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an important notice at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. production data. OPA1641-Q1 , opa1642-q1 sbos791 ? june 2017 opa164x-q1 soundplus ? jfet-input, automotive-grade, audio operational amplifiers 1 1 features 1 ? qualified for automotive applications ? aec-q100 qualified with the following results: ? device temperature grade 1: ? 40 c to +125 c ambient operating temperature ? device hbm esd classification level 2 ? device cdm esd classification level c6 ? low noise: 5.1 nv/ hz at 1 khz ? ultra-low distortion: 0.00005% at 1 khz ? high slew rate: 20 v/ s ? unity gain stable ? no phase reversal ? low quiescent current: 1.8 ma per channel ? rail-to-rail output ? wide supply range: 2.25 v to 18 v ? single, dual, and quad versions available 2 applications ? automotive ? hev and ev power train ? advanced driver assist (adas) ? infotainment systems ? in-cabin microphones 3 description the OPA1641-Q1 (single) and opa1642-q1 (dual) series are jfet-input, ultra-low distortion, low-noise operational amplifiers (op amps) fully specified for audio applications. the rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. features include 5.1-nv/ hz noise, low total harmonic distortion + noise (thd+n) (0.00005%), a low input bias current of 2 pa, and low quiescent current of 1.8 ma per channel. these devices operate over a very wide supply voltage range of 2.25 v to 18 v. the opa164x-q1 series of operational amplifiers are unity-gain stable and provide excellent dynamic behavior over a wide range of load conditions. the dual version features completely independent circuitry for lowest crosstalk and freedom from interactions between channels, even when overdriven or overloaded. device information (1) part number package body size (nom) OPA1641-Q1 soic (8) 4.90 mm 3.90 mm vssop (8) 3.00 mm 3.00 mm opa1642-q1 soic (8) 4.90 mm 3.90 mm vssop (8) 3.00 mm 3.00 mm (1) for all available packages, see the orderable addendum at the end of the data sheet. space simplified internal schematic extremely stable input capacitance 4 4.5 5 5.5 6 6.5 7 7.5 C10 C8 C6 C4 C2 0 2 4 6 8 10 common-mode capacitance (pf) common-mode voltage (v) opa164x family traditional jfet-input amplifier inC pre-output driver out in+ v+ vC copyright ? 2017 texas instruments inc. productfolder ordernow technical documents tools & software support &community
2 OPA1641-Q1 , opa1642-q1 sbos791 ? june 2017 www.ti.com product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated table of contents 1 features .................................................................. 1 2 applications ........................................................... 1 3 description ............................................................. 1 4 revision history ..................................................... 2 5 pin configuration and functions ......................... 3 6 specifications ......................................................... 4 6.1 absolute maximum ratings ..................................... 4 6.2 esd ratings .............................................................. 4 6.3 recommended operating conditions ....................... 4 6.4 thermal information .................................................. 4 6.5 electrical characteristics ........................................... 5 6.6 typical characteristics .............................................. 7 7 detailed description ............................................ 12 7.1 overview ................................................................. 12 7.2 functional block diagram ....................................... 12 7.3 feature description ................................................. 13 7.4 device functional modes ........................................ 15 8 application and implementation ........................ 16 8.1 application information ............................................ 16 8.2 typical application ................................................. 21 9 power supply recommendations ...................... 23 10 layout ................................................................... 24 10.1 layout guidelines ................................................. 24 10.2 layout example .................................................... 24 11 device and documentation support ................. 25 11.1 device support .................................................... 25 11.2 documentation support ....................................... 25 11.3 related links ........................................................ 26 11.4 receiving notification of documentation updates 26 11.5 community resources .......................................... 26 11.6 trademarks ........................................................... 26 11.7 electrostatic discharge caution ............................ 26 11.8 glossary ................................................................ 26 12 mechanical, packaging, and orderable information ........................................................... 26 4 revision history date revision notes june 2017 * initial release
3 OPA1641-Q1 , opa1642-q1 www.ti.com sbos791 ? june 2017 product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated 5 pin configuration and functions OPA1641-Q1: d and dgk packages 8-pin soic and vssop top view (1) nc - no internal connection pin functions: OPA1641-Q1 pin i/o description name no. ? in 2 i inverting input +in 3 i noninverting input nc 1, 5, 8 ? no connection out 6 o output v ? 4 ? negative (lowest) power supply v+ 7 ? positive (highest) power supply opa1642-q1: d and dgk packages 8-pin soic and vssop top view pin functions: opa1642-q1 pin i/o description name no. ? in a 2 i inverting input, channel a ? in b 6 i inverting input, channel b +in a 3 i noninverting input, channel a +in b 5 i noninverting input, channel b out a 1 o output, channel a out b 7 o output, channel b v ? 4 ? negative (lowest) power supply v+ 8 ? positive (highest) power supply 12 3 4 87 6 5 v+ out b Cin b +in b out a Cin a +in a vC a b C C + + 12 3 4 87 6 5 nc (1) v+ out nc (1) nc (1) Cin C +in + vC
4 OPA1641-Q1 , opa1642-q1 sbos791 ? june 2017 www.ti.com product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated (1) stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions . exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) input pins are diode-clamped to the power-supply rails. input signals that can swing more than 0.5 v beyond the supply rails must be current-limited to 10 ma or less. the input voltage and output negative-voltage ratings can be exceeded if the input and output current ratings are followed. (3) short-circuit to v s / 2 (ground in symmetrical dual-supply setups), one amplifier per package. 6 specifications 6.1 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) (1) min max unit v s supply voltage 40 v v in input voltage (2) (v ? ) ? 0.5 (v+) + 0.5 v i in input current (2) 10 ma v in(diff) differential input voltage vs v i o output short-circuit (3) continuous t a operating temperature ? 55 125 c t j junction temperature ? 65 150 c t stg storage temperature ? 65 150 c (1) aec q100-002 indicates that hbm stressing shall be in accordance with the ansi/esda/jedec js-001 specification. 6.2 esd ratings value unit v (esd) electrostatic discharge human-body model (hbm), per aec q100-002 (1) 3000 v charged-device model (cdm), per aec q100-011 1000 6.3 recommended operating conditions over operating free-air temperature range (unless otherwise noted) min nom max unit supply voltage (v+, v ? ) single supply 4.5 36 v dual supply 2.25 18 specified temperature ? 40 125 c (1) for more information about traditional and new thermal metrics, see the semiconductor and ic package thermal metrics application report. 6.4 thermal information thermal metric (1) OPA1641-Q1, opa1642-q1 unit d (soic) dgk (vssop) 8 pins 8 pins r ja junction-to-ambient thermal resistance 160 180 c/w r jc(top) junction-to-case (top) thermal resistance 75 55 c/w r jb junction-to-board thermal resistance 60 130 c/w jt junction-to-top characterization parameter 9 n/a c/w jb junction-to-board characterization parameter 50 120 c/w r jc(bot) junction-to-case (bottom) thermal resistance n/a n/a c/w
5 OPA1641-Q1 , opa1642-q1 www.ti.com sbos791 ? june 2017 product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated (1) full power bandwidth = sr / (2 v p ), where sr = slew rate. (2) see figure 19 and figure 20 . 6.5 electrical characteristics at t a = 25 c, v s = 4.5 v to 36 ( 2.25 v to 18 v), r l = 2 k ? connected to midsupply, and v cm = v out = midsupply (unless otherwise noted) parameter test conditions min typ max unit audio performance thd+n total harmonic distortion + noise g = 1, f = 1 khz, v o = 3 v rms 0.00005% ? 126 db imd intermodulation distortion smpte/din two-tone, 4:1 (60 hz and 7 khz), g = 1, v o = 3 v rms 0.00004% ? 128 db dim 30 (3-khz square wave and 15-khz sine wave), g = 1, v o = 3 v rms 0.00008% ? 122 db ccif twin-tone (19 khz and 20 khz), g = 1, v o = 3 v rms 0.00007% ? 123 db frequency response gbw gain-bandwidth product g = 1 11 mhz sr slew rate g = 1 20 v/ s full-power bandwidth (1) v o = 1 v p 3.2 mhz overload recovery time (2) g = ? 10 600 ns channel separation (dual and quad) f = 1 khz ? 126 db noise input voltage noise f = 20 hz to 20 khz 4.3 v pp e n input voltage noise density f = 10 hz 8 nv/ hz f = 100 hz 5.8 f = 1 khz 5.1 i n input current noise density f = 1 khz 0.8 fa/ hz offset voltage v os input offset voltage v s = 18 v 1 3.5 mv psrr v os vs power supply v s = 2.25 v to 18 v 0.14 2 v/v input bias current i b input bias current v cm = 0 v 2 20 pa i os input offset current v cm = 0 v 2 20 pa input voltage range v cm common-mode voltage range (v ? ) ? 0.1 (v+) ? 3.5 v cmrr common-mode rejection ratio v cm = (v ? ) ? 0.1 v to (v+) ? 3.5 v, v s = 18 v 120 126 db input impedance differential 10 13 || 8 || pf common-mode v cm = (v ? ) ? 0.1 v to (v+) ? 3.5 v 10 13 || 6 || pf open-loop gain a ol open-loop voltage gain (v ? ) + 0.2 v v o (v+) ? 0.2 v, r l = 10 k 120 134 db (v ? ) + 0.35 v v o (v+) ? 0.35 v, r l = 2 k 114 126
6 OPA1641-Q1 , opa1642-q1 sbos791 ? june 2017 www.ti.com product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated electrical characteristics (continued) at t a = 25 c, v s = 4.5 v to 36 ( 2.25 v to 18 v), r l = 2 k ? connected to midsupply, and v cm = v out = midsupply (unless otherwise noted) parameter test conditions min typ max unit output v o voltage output swing from rail r l = 10 k , a ol 120 db (v ? ) + 0.2 (v+ ) ? 0.2 v r l = 2 k , a ol 114 db (v ? ) + 0.35 (v+) ? 0.35 i out output current see typical characteristics z o open-loop output impedance see typical characteristics i sc short-circuit current source 36 ma sink ? 30 c load capacitive load drive see typical characteristics power supply v s specified voltage 2.25 18 v i q quiescent current (per amplifier) i out = 0 a 1.8 2.3 ma temperature range specified range ? 40 125 c operating range ? 55 125 c
7 OPA1641-Q1 , opa1642-q1 www.ti.com sbos791 ? june 2017 product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated 6.6 typical characteristics at t a = 25 c, r l = 2 k ? connected to midsupply, and v cm = v out = midsupply (unless otherwise noted) figure 1. input voltage noise density vs frequency figure 2. 0.1-hz to 10-hz noise figure 3. maximum output voltage vs frequency figure 4. cmrr and psrr vs frequency (referred to input) figure 5. gain and phase vs frequency figure 6. closed-loop gain vs frequency 3020 10 0 C10 C20 gain (db) 100k 1m 10m 100m frequency (hz) g = +10 g = +1 g = C1 3530 25 20 15 10 50 output voltage (v ) pp 10k 100k 1m 10m frequency (hz) v = 2.25 v s v = 5 v s v = 15 v s maximum output voltage range without slew-rate induced distortion 160140 120 100 8060 40 20 0 common-mode rejection ratio (db) power-supply rejection ratio (db) 1 10 100 1k 10k 100k 1m 10m 100m frequency (hz) cmrr +psrr Cpsrr voltage noise density (nv/ ) ? hz 0.1 frequency (hz) 100k 10 1 100 1k 10k 100 10 1 100 nv/div time (1 s/div) 140120 100 8060 40 20 0 -20 180135 90 45 0 gain (db) phase () 50 100 1k 10k 100k 1m 10m 100m frequency (hz) phase gain
8 OPA1641-Q1 , opa1642-q1 sbos791 ? june 2017 www.ti.com product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated typical characteristics (continued) at t a = 25 c, r l = 2 k ? connected to midsupply, and v cm = v out = midsupply (unless otherwise noted) vout = 3 v rms bw = 80 khz figure 7. thd+n ratio vs frequency vout = 3 v rms bw > 500 khz figure 8. thd+n ratio vs frequency bw = 80 khz 1 khz signal r source = 0 figure 9. thd+n ratio vs output amplitude g = 1 figure 10. intermodulation distortion vs output amplitude v s = 15 v v out = 3 v rms g = 1 figure 11. channel separation vs frequency figure 12. no phase reversal output output time (0.4 s/div) m 5 v/div +18 v - 18 v 37 v pp sine wave ( 18.5 v) OPA1641-Q1 C80 C90 C100 C110 C120 C130 C140 channel separation (db) 10 frequency (hz) 100k 100 1k 10k r = 2 k ! l r = 600 ! l l r = 5 k ! 0.01% 0.001% 0.0001% 0.00001% total harmonic distortion + noise total harmonic distortion + noise (db) 0.1 1 10 20 output amplitude (v ) rms C80 C100 C120 C140 g = C1, r = 2 k l ! g = +1, r = 2 k l ! 0.01% 0.001% 0.0001% 0.00001% intermodulation distortion intermodulation distortion (db) 0.1 1 10 20 output amplitude (v ) rms -- - 80100 120 -140 ccif twin-tone (19 khz and 20 khz) dim30 (3 khz square wave and 15 khz sine wave) smpte/din two-tone 4:1 (60 hz and 7 khz) 0.001% 0.0001% 0.00001% C100 C120 C140 total harmonic distortion + noise total harmonic distortion + noise (db) 10 100 1k 10k 20k frequency (hz) g = +1 r = 600 l ! g = +1 r = 2 k l ! g = C1 r = 2 k l ! g = C1 r = 600 l ! 0.01% 0.001% 0.0001% 0.00001% total harmonic distortion + noise 10 100 1k 10k 100k frequency (hz) g = C1 r = 2 k l ! g = C1 r = 600 l ! g = +1 r = 600 l ! C80 C100 C120 C140 total harmonic distortion + noise (db) g = +1 r = 2 k l !
9 OPA1641-Q1 , opa1642-q1 www.ti.com sbos791 ? june 2017 product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated typical characteristics (continued) at t a = 25 c, r l = 2 k ? connected to midsupply, and v cm = v out = midsupply (unless otherwise noted) g = 1 c l = 100 pf figure 13. small-signal step response (100 mv) g = ? 1 c l = 100 pf figure 14. small-signal step response (100 mv) g = 1 c l = 100 pf figure 15. large-signal step response g = ? 1 c l = 100 pf figure 16. large-signal step response g = ? 10 figure 17. positive overload recovery g = ? 10 figure 18. negative overload recovery time (0.4 s/div) m 2 k w 20 k w v in v out OPA1641-Q1 5 v/div v in v out time (0.4 s/div) m 2 k w 20 k w v in v out OPA1641-Q1 5 v/div v in v out 2 v/div time (400 ns/div) 2 v/div time (400 ns/div) 20 mv/div time (100 ns/div) +15 v - 15 v c l r l OPA1641-Q1 time (100 ns/div) 20 mv/div +15 v - 15 v r f = 2 k w r i = 2 k w c l OPA1641-Q1
10 OPA1641-Q1 , opa1642-q1 sbos791 ? june 2017 www.ti.com product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated typical characteristics (continued) at t a = 25 c, r l = 2 k ? connected to midsupply, and v cm = v out = midsupply (unless otherwise noted) g = 1 figure 19. small-signal overshoot vs capacitive load (100-mv output step) g = ? 1 figure 20. small-signal overshoot vs capacitive load (100-mv output step) figure 21. open-loop gain vs temperature figure 22. i b and i os vs temperature v s = 18 v figure 23. i b and i os vs common-mode voltage figure 24. quiescent current vs temperature 45%40% 35% 30% 25% 20% 15% 10% 5% 0 overshoot 0 100 200 300 400 500 600 700 800 900 1000 capacitive load (pf) r = 0 w out r = 24 w out r = 51 w out OPA1641-Q1 r = i 2 k w r out c l r f = 2 k w +15 v - 15 v 10 86 4 2 0 C2 C4 C6 C8 C10 i and i (pa) b os C18 C12 C6 0 6 12 18 common-mode voltage (v) +i b i os Ci b common-mode range 2.5 2 1.5 1 0.5 0 i (ma) q C40 C10 20 50 65 5 35 80 95 110 125 temperature (c) C25 0 C0.2 C0.4 C0.6 C0.8 C1 C1.2 a ( v/v) ! ol -40 -15 10 35 60 85 temperature (c) 10 k " 2 k " 8070 60 50 40 30 20 10 0 C10 C20 i and i (pa) b os C40 C15 10 35 60 85 temperature ( c) Ci b +i b Ci os 40%35% 30% 25% 20% 15% 10% 5% 0 overshoot 0 100 200 300 400 500 600 700 800 900 1000 capacitive load (pf) r = 0 w out r = 24 w out r = 51 w out +15 v - 15 v r out c l OPA1641-Q1 r l
11 OPA1641-Q1 , opa1642-q1 www.ti.com sbos791 ? june 2017 product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated typical characteristics (continued) at t a = 25 c, r l = 2 k ? connected to midsupply, and v cm = v out = midsupply (unless otherwise noted) figure 25. quiescent current vs supply voltage v out = midsupply (includes self-heating) figure 26. short-circuit current vs temperature figure 27. output voltage vs output current figure 28. open-loop output impedance vs frequency output voltage (v) 0 10 20 30 40 50 output current (ma) +85 c +25 c -40 c 18 17.5 17 16.5 16 -16 16.5 17 17.5 18 - - - - +125 c z ( ) w o 10 frequency (hz) 100m 100 1k 10k 100k 10m 1m 1k 100 10 1 2 1.75 1.5 1.25 1 0.75 0.5 0.25 0 i (ma) q 0 4 8 12 16 20 24 28 32 36 supply voltage (v) specified supply-voltage range 6050 40 30 20 10 0 i sc (ma) C50 C25 0 25 50 75 100 125 temperature ( c) i sc-sink i sc-source
12 OPA1641-Q1 , opa1642-q1 sbos791 ? june 2017 www.ti.com product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated 7 detailed description 7.1 overview the opa164x-q1 family of operational amplifiers combine an ultra-low noise jfet input stage with a rail-to-rail output stage to provide high overall performance in audio applications. the internal topology is selected specifically to deliver extremely low distortion, consume limited power, and accommodate small packages. these amplifiers are well-suited for analog signal processing applications such as active filter circuits, pre-amplifiers, and tone controls. the unique input stage design and semiconductor processes used in this device deliver extremely high performance even in applications with high source impedance and wide common-mode voltage swings. 7.2 functional block diagram inC pre-output driver out in+ v+ vC copyright ? 2017 texas instruments inc.
13 OPA1641-Q1 , opa1642-q1 www.ti.com sbos791 ? june 2017 product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated 7.3 feature description 7.3.1 phase reversal protection the opa164x-q1 family has internal phase-reversal protection. many op amps exhibit phase reversal when the input is driven beyond the linear common-mode range. this condition is most often encountered in noninverting circuits when the input is driven beyond the specified common-mode voltage range, causing the output to reverse into the opposite rail. the input of the opa164x-q1 prevents phase reversal with excessive common- mode voltage. instead, the appropriate rail limits the output voltage. this performance is shown in figure 29 . figure 29. output waveform devoid of phase reversal during an input overdrive condition 7.3.2 output current limit the output current of the opa164x-q1 series is limited by internal circuitry to 36 ma and ? 30 ma (sourcing and sinking), to protect the device if the output is accidentally shorted. this short-circuit current depends on temperature; see figure 26 . although uncommon for most modern audio applications to require 600- load drive capability, many audio operational amplifier applications continue to specify the total harmonic distortion (thd+n) at 600- load for comparative purposes. figure 7 and figure 8 provide typical thd+n measurement curves for the opa164x-q1 series, where the output drives a 3-v rms signal into a 600- load. however, correct device operation cannot be ensured when driving 600- loads at full supply. depending on supply voltage and temperature, this operating condition can possibly trigger the output current limit circuitry of the device. 7.3.3 emi rejection ratio (emirr) the electromagnetic interference (emi) rejection ratio, or emirr, describes the emi immunity of operational amplifiers. an adverse effect that is common to many operational amplifiers is a change in the offset voltage as a result of rf signal rectification. an operational amplifier that is more efficient at rejecting this change in offset as a result of emi has a higher emirr and is quantified by a decibel value. measuring emirr can be performed in many ways, but this document provides the emirr in+, which specifically describes the emirr performance when the rf signal is applied to the noninverting input pin of the operational amplifier. in general, only the noninverting input is tested for emirr for the following three reasons: ? operational amplifier input pins are known to be the most sensitive to emi, and typically rectify rf signals better than the supply or output pins. ? the noninverting and inverting operational amplifier inputs have symmetrical physical layouts and exhibit nearly matching emirr performance. ? emirr is easier to measure on noninverting pins than on other pins because the noninverting input pin can be isolated on a printed-circuit-board (pcb). this isolation allows the rf signal to be applied directly to the noninverting input pin with no complex interactions from other components or connecting pcb traces. a more formal discussion of the emirr in+ definition and test method is provided in application report emi rejection ratio of operational amplifiers , available for download at www.ti.com . output output time (0.4 s/div) m 5 v/div +18 v - 18 v 37 v pp sine wave ( 18.5 v) OPA1641-Q1
14 OPA1641-Q1 , opa1642-q1 sbos791 ? june 2017 www.ti.com product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated feature description (continued) the emirr in+ of the opa164x-q1 is plotted versus frequency in figure 30 . if available, any dual and quad operational amplifier device versions have nearly identical emirr in+ performance. the opa164x-q1 unity-gain bandwidth is 11 mhz. emirr performance below this frequency denotes interfering signals that fall within the operational amplifier bandwidth. figure 30. opa164x-q1 emirr vs frequency table 1 lists the emirr in+ values for the opa164x-q1 at particular frequencies commonly encountered in real- world applications. applications listed in table 1 can be centered on or operated near the particular frequency shown. this information can be of special interest to designers working with these types of applications, or working in other fields likely to encounter rf interference from broad sources, such as the industrial, scientific, and medical (ism) radio band. table 1. opa164x-q1 emirr in+ for frequencies of interest frequency application and allocation emirr in+ 400 mhz mobile radio, mobile satellite, space operation, weather, radar, uhf 53.1 db 900 mhz gsm, radio communication and navigation, gps (to 1.6 ghz), ism, aeronautical mobile, uhf 72.2 db 1.8 ghz gsm, mobile personal comm. broadband, satellite, l-band 80.7 db 2.4 ghz 802.11b/g/n, bluetooth ? , mobile personal comm., ism, amateur radio and satellite, s-band 86.8 db 3.6 ghz radiolocation, aero comm./nav., satellite, mobile, s-band 91.7 db 5 ghz 802.11a/n, aero communication and navigation, mobile communication, space and satellite operation, c-band 96.6 db 0 20 40 60 80 100 120 140 10m 100m 1g 10g emirr (db) frequency (hz) c003
15 OPA1641-Q1 , opa1642-q1 www.ti.com sbos791 ? june 2017 product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated 7.3.3.1 emirr in+ test configuration figure 31 shows the circuit configuration for testing the emirr in+. an rf source is connected to the operational amplifier noninverting input pin using a transmission line. the operational amplifier is configured in a unity-gain buffer topology with the output connected to a low-pass filter (lpf) and a digital multimeter (dmm). a large impedance mismatch at the operational amplifier input causes a voltage reflection; however, this effect is characterized and accounted for when determining the emirr in+. the resulting dc offset voltage is sampled and measured by the multimeter. the lpf isolates the multimeter from residual rf signals that can interfere with multimeter accuracy. see emi rejection ratio of operational amplifiers for more details. figure 31. emirr in+ test configuration schematic 7.4 device functional modes 7.4.1 operating voltage the opa164x-q1 series of operational amplifiers can be used with single or dual supplies from an operating range of v s = 4.5 v ( 2.25 v) and up to v s = 36 v ( 18 v). these devices do not require symmetrical supplies; only a minimum supply voltage of 4.5 v ( 2.25 v) is required. for v s less than 3.5 v, the common-mode input range does not include midsupply. supply voltages higher than 40 v can permanently damage the device; see absolute maximum ratings for more information. key parameters are specified over the operating temperature range, t a = ? 40 c to +85 c. key parameters that vary over the supply voltage or temperature range are shown in typical characteristics . + low-pass filter 50 digital multimeter ambient temperature: 25 ?& sample / averaging +v s -v s not shown: 0.1 f and 10 f supply decoupling rf source dc bias: 0 v modulation: none (cw) frequency sweep: 201 pt. log
16 OPA1641-Q1 , opa1642-q1 sbos791 ? june 2017 www.ti.com product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated 8 application and implementation note information in the following applications sections is not part of the ti component specification, and ti does not warrant its accuracy or completeness. ti ? s customers are responsible for determining suitability of components for their purposes. customers should validate and test their design implementation to confirm system functionality. 8.1 application information the opa164x-q1 amplifiers are unity-gain stable, audio operational amplifiers with very low noise, input bias current, and input offset voltage. applications with noisy or high-impedance power supplies require decoupling capacitors placed close to the device pins. in most cases, 0.1- f capacitors are adequate. figure 32 shows a simplified schematic of the OPA1641-Q1. figure 32. simplified internal schematic inC pre-output driver out in+ v+ vC copyright ? 2017 texas instruments inc.
17 OPA1641-Q1 , opa1642-q1 www.ti.com sbos791 ? june 2017 product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated application information (continued) 8.1.1 total harmonic distortion measurements the opa164x-q1 series operational amplifiers have excellent distortion characteristics. thd + noise is below 0.00005% (g = 1, v o = 3 v rms , bw = 80 khz) throughout the audio frequency range, 20 hz to 20 khz, with a 2-k ? load (see figure 7 ). the distortion produced by the opa164x-q1 series op amps is below the measurement limit of many commercially available distortion analyzers. however, a special test circuit (such as shown in figure 33 ) can be used to extend the measurement capabilities. operational amplifier distortion can be considered an internal error source that can be referred to the input. figure 33 shows a circuit that causes the operational amplifier distortion to be 101 times (or approximately 40 db) greater than that normally produced by the op amp. the addition of r 3 to the otherwise standard noninverting amplifier configuration alters the feedback factor or noise gain of the circuit. the closed-loop gain is unchanged, but the feedback available for error correction is reduced by a factor of 101, extending the resolution by 101. the input signal and load applied to the op amp are the same as with conventional feedback without r 3 . keep the value of r 3 small to minimize any effect on distortion measurements. the validity of this technique can be verified by duplicating measurements at high gain or high frequency where the distortion is within the measurement capability of the test equipment. measurements for this document were made with an audio precision system two distortion and noise analyzer that greatly simplifies repetitive measurements. however, the measurement technique can be performed with manual distortion measurement instruments. space (1) for measurement bandwidth, see figure 7 through figure 10 . figure 33. distortion test circuit 8.1.2 source impedance and distortion in traditional jfet-input op amps, the impedance applied to the positive and negative inputs in noninverting applications must be matched for lowest distortion. legacy methods for fabricating the jfets in the fet input stage exhibit a varying input capacitance with applied common-mode input voltage. in inverting configurations, the input does not vary with input voltage because the inverting input is held at virtual ground. however, in noninverting applications, the inputs do vary, and the gate-to-source voltage is not constant. this effect produces increased distortion resulting from the varying capacitance for unmatched source impedances. however, the opa164x-q1 family of amplifiers is designed to maintain a constant input capacitance with varying common- mode voltage to prevent this mechanism of distortion. the variation of input capacitance with common-mode voltage for a traditional amplifier is compared to the opa164x-q1 family in figure 34 . r 2 OPA1641-Q1 r 1 signal gain = 1+ distortion gain = 1+ r 3 generatoroutput analyzer input audio precision system two (1) with pc controller signal gain distortion gain r 1 r 2 r 3 100 w 1 k w 1 k w 10 w 11 w 1 11 101101 r 2 r 1 r 2 r ii r 1 3 load copyright ? 2016, texas instruments incorporated v = 3 v o rms
18 OPA1641-Q1 , opa1642-q1 sbos791 ? june 2017 www.ti.com product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated figure 34. input capacitance of the opa164x-q1 family of amplifiers compared to traditional jfet- input amplifiers by stabilizing the input capacitance, the distortion performance of the amplifier is greatly improved for noninverting configurations with high source impedances. the measured performance of an opa164x-q1 amplifier is compared to a traditional jfet-input amplifier in figure 35 . the unity-gain configuration, high source impedance, and large-signal amplitude produce additional distortion in the traditional amplifier. figure 35. measured thd+n of the opa164x-q1 family of amplifiers compared to traditional jfet- input amplifiers 8.1.3 capacitive load and stability the dynamic characteristics of the opa164x-q1 are optimized for commonly encountered gains, loads, and operating conditions. the combination of low closed-loop gain and high capacitive loads decreases the phase margin of the amplifier and can lead to gain peaking or oscillations. as a result, heavier capacitive loads must be isolated from the output. the simplest way to achieve this isolation is to add a small resistor (r out equal to 50 , for example) in series with the output. figure 19 and figure 20 illustrate graphs of small-signal overshoot vs capacitive load for several values of r out . for details of analysis techniques and application circuits, see see feedback plots define op amp ac performance available for download at www.ti.com 4 4.5 5 5.5 6 6.5 7 7.5 C10 C8 C6 C4 C2 0 2 4 6 8 10 common-mode capacitance (pf) common-mode voltage (v) opa164x family traditional jfet-input amplifier C120 C110 C100 C90 C80 C70 C60 C50 C40 0.0001% 0.001% 0.01% 0.1% 1% 10 100 1k 10k 20k total harmonic distortion + noise (db) total harmonic distortion + noise frequency (hz) 10 k ! +C 5 v rms opa164x amplifier traditional jfet-input amplifier
19 OPA1641-Q1 , opa1642-q1 www.ti.com sbos791 ? june 2017 product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated 8.1.4 power dissipation and thermal protection the opa164x-q1 op amps are capable of driving 2-k loads with power-supply voltages of up to 18 v over the specified temperature range. in a single-supply configuration, where the load is connected to the negative supply voltage, the minimum load resistance is 2.8 k at a supply voltage of 36 v. for lower supply voltages (either single-supply or symmetrical supplies), a lower load resistance can be used, as long as the output current does not exceed 13 ma; otherwise, the device short-circuit current-protection circuit can activate. internal power dissipation increases when operating at high supply voltages. copper leadframe construction used in the opa164x-q1 series of devices improves heat dissipation compared to conventional materials. pcb layout can help reduce a possible increase in junction temperature. wide copper traces help dissipate the heat by functioning as an additional heat sink. temperature rise can be further minimized by soldering the devices directly to the pcb rather than using a socket. although the output current is limited by internal protection circuitry, accidental shorting one or more output channels of a device can result in excessive heating. for instance, when an output is shorted to midsupply, the typical short-circuit current of 36 ma leads to an internal power dissipation of over 600 mw at a supply of 18 v. in case of a dual opa1642-q1 in an vssop-8 package (thermal resistance r ja = 180 c/w), such a power dissipation results in the die temperature to be 220 c above ambient temperature, when both channels are shorted. this temperature increase destroys the device. to prevent such excessive heating that can destroy the device, the opa164x-q1 series has an internal thermal shutdown circuit that shuts down the device if the die temperature exceeds approximately 180 c. when this thermal shutdown circuit activates, a built-in hysteresis of 15 c ensures that the die temperature must drop to approximately 165 c before the device switches on again. 8.1.5 electrical overstress designers often ask questions about the capability of an operational amplifier to withstand electrical overstress. these questions tend to focus on the device inputs, but can involve the supply voltage pins or even the output pin. each of these different pin functions have electrical stress limits determined by the voltage breakdown characteristics of the particular semiconductor fabrication process and specific circuits connected to the pin. additionally, internal electrostatic discharge (esd) protection is built into these circuits to protect them from accidental esd events both before and during product assembly. having a good understanding of this basic esd circuitry and the relevance to an electrical overstress event is helpful. figure 36 illustrates the esd circuits contained in the opa164x-q1 series (indicated by the dashed line area). the esd protection circuitry involves several current-steering diodes connected from the input and output pins and routed back to the internal power-supply lines where an internal absorption device is connected. this protection circuitry is intended to remain inactive during normal circuit operation. an esd event produces a short-duration, high-voltage pulse that is transformed into a short-duration, high- current pulse when discharging through a semiconductor device. the esd protection circuits are designed to provide a current path around the operational amplifier core to prevent damage. the energy absorbed by the protection circuitry is then dissipated as heat. when an esd voltage develops across two or more of the amplifier device pins, current flows through one or more of the steering diodes. depending on the path that the current takes, the absorption device can activate. the absorption device has a trigger (or threshold voltage) that is above the normal operating voltage of the opa164x-q1 but below the device breakdown voltage level. when this threshold is exceeded, the absorption device quickly activates and clamps the voltage across the supply rails to a safe level. when the operational amplifier connects into a circuit as shown in figure 36 , the esd protection components are intended to remain inactive and not become involved in the application circuit operation. however, circumstances can arise where an applied voltage exceeds the operating voltage range of a given pin. if this condition occurs, some of the internal esd protection circuits can be biased on and conduct current. any such current flow occurs through steering diode paths and rarely involves the absorption device. figure 36 depicts a specific example where the input voltage (v in ) exceeds the positive supply voltage (+v s ) by 500 mv or more. much of what happens in the circuit depends on the supply characteristics. if +v s can sink the current, one of the upper input steering diodes conducts and directs current to +v s . excessively high current levels can flow with increasingly higher v in . as a result, the data sheet specifications recommend that applications limit the input current to 10 ma.
20 OPA1641-Q1 , opa1642-q1 sbos791 ? june 2017 www.ti.com product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated if the supply is not capable of sinking the current, v in can begin sourcing current to the operational amplifier, and then take over as the source of positive supply voltage. the danger in this case is that the voltage can rise to levels that exceed the operational amplifier absolute maximum ratings. another common question involves what happens to the amplifier if an input signal is applied to the input when the power supplies +v s and ? v s are at 0 v. the amplifier behavior depends on the supply characteristic when at 0 v, or at a level below the input signal amplitude. if the supplies appear as high impedance, then the operational amplifier supply current can be supplied by the input source through the current steering diodes. this state is not a normal bias condition; the amplifier most likely does not operate normally. if the supplies are low impedance, then the current through the steering diodes can become quite high. the current level depends on the ability of the input source to deliver current and any resistance in the input path. if there is an uncertainty about the ability of the supply to absorb this current, external zener diodes can be added to the supply pins, as shown in figure 36 . the zener voltage must be selected so the diode does not turn on during normal operation. however, the zener voltage must be low enough so that the zener diode conducts if the supply pin begins to rise above the safe operating supply voltage level. (1) v in = +v s + 500 mv. (2) tvs: +v s(max) > v tvsbr (min) > +v s (3) suggested value is approximately 1 k . figure 36. equivalent internal esd circuitry and the relation to a typical circuit application r f op-amp core r i r l v (1) in i d - in out +in esd current-steering diodes edge-triggered esd absorption circuit +v s +v - v - v s OPA1641-Q1 r s (3) tvs (2) tvs (2) copyright ? 2016, texas instruments incorporated
21 OPA1641-Q1 , opa1642-q1 www.ti.com sbos791 ? june 2017 product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated 8.2 typical application 8.2.1 single-supply electret microphone preamplifier for speech electret microphones are commonly used in automotive hands-free phone systems because of their small size, low cost, and relatively good signal-to-noise ratio (snr). the low noise and distortion of the OPA1641-Q1 makes the device a good choice for preamplifier circuits for electret microphones. the circuit shown in figure 37 is a single-supply preamplifier circuit for electret microphones with a bandwidth from 100 hz to 3 khz for capturing speech. figure 37. preamplifier circuit for electret microphones using a single power supply voltage 8.2.1.1 design requirements ? 9-v single supply ? 1-v rms output for 100-db spl input ? approximately 100-hz to 3-khz, ? 3-db bandwidth ? microphone sensitivity: 8 a / pa ? microphone operating voltage: 2 v to 10 v ? microphone bias current: 500 a 8.2.1.2 detailed design procedure in this circuit, the op amp is configured as a transimpedance amplifier which converts the signal current of the microphone into an output voltage. the bandwidth of this circuit is limited to the vocal range as is common in telephony systems. the gain of the circuit is determined by the feedback resistor (r fb ), which must be calculated according to the microphone sensitivity. for this design, a microphone output current of 8 a per pascal (pa) of air pressure was selected. using this value, the output current for a sound pressure level of 100 db spl , or 2 pa air pressure, is calculated in equation 1 . (1) r fb is then calculated from this current to produce 1-v rms output for a 100-db spl input signal in equation 2 . (2) the feedback capacitor (c fb ) is calculated to limit the bandwidth of the amplifier to 3 khz in equation 3 . (3) o rms fb mic v 1 v r 62500 61.9 k i 16 a o : p mic 8 a i 2 pa = 16 a 1 pa p u p v s+ OPA1641-Q1 v s + 61.9 k 0.1 f +9 v +9 v electret microphone +9 v r div 100 k r bias r fb c in c fb output 14 k 0.1 f c div 160 nf 1 nf r div 100 k copyright ? 2016, texas instruments incorporated 12 fb fb h 1 1 c 857 10 1 nf 2 r f 2 (61.9 k ) (3 khz) u o ? s ? ? ? s ? : ?
22 OPA1641-Q1 , opa1642-q1 sbos791 ? june 2017 www.ti.com product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated typical application (continued) r bias is necessary to divert the microphone signal current through capacitor c in rather than flowing from the power supply (v cc ). larger values of r bias allow for a smaller capacitor to be used for c in and reduces the overall noise of the circuit. however, the maximum value for r bias is limited by the microphone bias current and minimum operating voltage. the value of r bias is calculated in equation 4 . (4) input capacitor c in forms a high-pass filter in combination with resistor r bias . the filter corner frequency calculation is shown in equation 5 to place the high-pass corner frequency at 100 hz. (5) the voltage divider network at the op amp noninverting input is used to bias the op amp output to the midsupply point (v cc / 2) to maximize the output voltage range of the circuit. this result is easily achieved by selecting the same value for both resistors in the divider. the absolute value of those resistors is limited by the acceptable power-supply current drawn by the voltage divider. choosing 50 a as an acceptable limit of supply current gives a value of 100 k for the resistors in the divider, as equation 6 shows. (6) finally, to minimize the additional noise contribution from the voltage divider, a capacitor is placed at the op amp noninverting input. this capacitor forms a low-pass filter with the parallel combination of the voltage divider resistors. selecting a filter corner frequency of 20 hz minimizes the noise contribution of the voltage divider inside the amplifier passband; see equation 7 . (7) 7 div div l 1 1 c 1.592 10 160 nf r 100 k 2 (20 hz) 2 f 2 2 u o : ? s ? ? ? s ? ? ? ? ? 1 ? 1 cc div div v 9 v r 90 k 100 k 2 i 2 50 a t t t : o : ? ? p 9 in bias l 1 1 c 113.7 10 100 nf 2 r f 2 (14 k ) (100 hz) u o ? s ? ? ? s ? : ? cc mic bias bias v v 9 v 2 v r 14 k i 500 a : p
23 OPA1641-Q1 , opa1642-q1 www.ti.com sbos791 ? june 2017 product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated typical application (continued) 8.2.1.3 application curve the transfer function of the microphone preamplifier circuit is shown in figure 38 . the nominal gain of the circuit is 95.46 db, or 59,292.5 v per amp of input current. the ? 3-db bandwidth limits of the circuit are 105.7 hz and 2.77 khz. figure 38. microphone preamplifier transfer function 9 power supply recommendations the opa164x-q1 devices are specified for operation from 4.5 v to 36 v ( 2.25 v to 18 v); many specifications apply from ? 40 c to +125 c. parameters that can exhibit significant variance with regard to operating voltage or temperature are presented in typical characteristics . 80 82 84 86 88 90 92 94 96 98 10 100 1k 10k 20k gain (db, v/a) frequency (hz)
24 OPA1641-Q1 , opa1642-q1 sbos791 ? june 2017 www.ti.com product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated 10 layout 10.1 layout guidelines for best operational performance of the device, use good pcb layout practices, including: ? noise can propagate into analog circuitry through the power pins of the circuit as a whole and of the op amp itself. bypass capacitors reduce the coupled noise by providing low-impedance power sources local to the analog circuitry. ? connect low-esr, 0.1- f ceramic bypass capacitors between each supply pin and ground, placed as close as possible to the device. a single bypass capacitor from v+ to ground is applicable for single- supply applications. ? separate grounding for analog and digital portions of circuitry is one of the simplest and most-effective methods of noise suppression. one or more layers on multilayer pcbs are usually devoted to ground planes. a ground plane helps distribute heat and reduces emi noise pickup. take care to physically separate digital and analog grounds, paying attention to the flow of the ground current. ? to reduce parasitic coupling, run the input traces as far away as possible from the supply or output traces. if these traces cannot be kept separate, crossing the sensitive trace perpendicular is much better as opposed to in parallel with the noisy trace. ? place the external components as close as possible to the device. as shown in figure 39 , keeping rf and rg close to the inverting input minimizes parasitic capacitance. ? keep the length of input traces as short as possible. always remember that the input traces are the most sensitive part of the circuit. ? consider a driven, low-impedance guard ring around the critical traces. a guard ring can significantly reduce leakage currents from nearby traces that are at different potentials. ? ti recommends cleaning the pcb following board assembly for best performance. ? any precision integrated circuit can experience performance shifts resulting from moisture ingress into the plastic package. following any aqueous pcb cleaning process, ti recommends baking the pcb assembly to remove moisture introduced into the device packaging during the cleaning process. a low temperature, post-cleaning bake at 85 c for 30 minutes is sufficient for most circumstances. 10.2 layout example figure 39. OPA1641-Q1 layout example n/c in +in v v+ output n/c n/c vs+ gnd vs gnd ground (gnd) plane on another layer vout vin gnd run the input traces as far away from the supply lines as possible use low-esr, ceramic bypass capacitor rf rg place components close to device and to each other to reduce parasitic errors + vin vout rg rf (schematic representation) use low-esr, ceramic bypass capacitor
25 OPA1641-Q1 , opa1642-q1 www.ti.com sbos791 ? june 2017 product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated 11 device and documentation support 11.1 device support 11.1.1 development support 11.1.1.1 tina-ti ? (free software download) tina ? is a simple, powerful, and easy-to-use circuit simulation program based on a spice engine. tina-ti is a free, fully-functional version of the tina software, preloaded with a library of macromodels in addition to a range of both passive and active models. tina-ti provides all the conventional dc, transient, and frequency domain analysis of spice, as well as additional design capabilities. available as a free download from the analog elab design center, tina-ti offers extensive post-processing capability that allows users to format results in a variety of ways. virtual instruments offer the ability to select input waveforms and probe circuit nodes, voltages, and waveforms, creating a dynamic quick-start tool. note these files require that either the tina software (from designsoft ? ) or tina-ti software be installed. download the free tina-ti software from the tina-ti folder . 11.1.1.2 ti precision designs ti precision designs, available online at http://www.ti.com/ww/en/analog/precision-designs/ , are analog solutions created by ti ? s precision analog applications experts and offer the theory of operation, component selection, simulation, complete pcb schematic and layout, bill of materials, and measured performance of many useful circuits. 11.1.1.3 webench ? filter designer webench ? filter designer is a simple, powerful, and easy-to-use active filter design program. the webench filter designer lets optimized filter designs to be created using a selection of ti operational amplifiers and passive components from ti's vendor partners. available as a web based tool from the webench ? design center, the webench ? filter designer allows complete multistage active filter solutions to be designed, optimized, and simulated within minutes. 11.2 documentation support 11.2.1 related documentation for related documentation see the following: ? operational amplifier gain stability, part 3: ac gain-error analysis ? operational amplifier gain stability, part 2: dc gain-error analysis ? using infinite-gain, mfb filter topology in fully differential active filters ? op amp performance analysis ? single-supply operation of operational amplifiers ? tuning in amplifiers ? shelf-life evaluation of lead-free component finishes
26 OPA1641-Q1 , opa1642-q1 sbos791 ? june 2017 www.ti.com product folder links: OPA1641-Q1 opa1642-q1 submit documentation feedback copyright ? 2017, texas instruments incorporated 11.3 related links table 2 lists quick access links. categories include technical documents, support and community resources, tools and software, and quick access to sample or buy. table 2. related links parts product folder sample & buy technical documents tools & software support & community OPA1641-Q1 click here click here click here click here click here opa1642-q1 click here click here click here click here click here 11.4 receiving notification of documentation updates to receive notification of documentation updates, navigate to the device product folder on ti.com. in the upper right corner, click on alert me to register and receive a weekly digest of any product information that has changed. for change details, review the revision history included in any revised document. 11.5 community resources the following links connect to ti community resources. linked contents are provided "as is" by the respective contributors. they do not constitute ti specifications and do not necessarily reflect ti's views; see ti's terms of use . ti e2e ? online community ti's engineer-to-engineer (e2e) community. created to foster collaboration among engineers. at e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers. design support ti's design support quickly find helpful e2e forums along with design support tools and contact information for technical support. 11.6 trademarks e2e is a trademark of texas instruments. tina-ti is a trademark of texas instruments, inc and designsoft, inc. tina, designsoft are trademarks of designsoft, inc. 11.7 electrostatic discharge caution this integrated circuit can be damaged by esd. texas instruments recommends that all integrated circuits be handled with appropriate precautions. failure to observe proper handling and installation procedures can cause damage. esd damage can range from subtle performance degradation to complete device failure. precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. 11.8 glossary slyz022 ? ti glossary . this glossary lists and explains terms, acronyms, and definitions. 12 mechanical, packaging, and orderable information the following pages include mechanical, packaging, and orderable information. this information is the most current data available for the designated devices. this data is subject to change without notice and revision of this document. for browser-based versions of this data sheet, refer to the left-hand navigation.
package option addendum www.ti.com 28-jun-2017 addendum-page 1 packaging information orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish (6) msl peak temp (3) op temp (c) device marking (4/5) samples opa1641aqdgkrq1 active vssop dgk 8 2500 green (rohs & no sb/br) cu nipdauag level-2-260c-1 year -40 to 125 1641 opa1642aqdgkrq1 preview vssop dgk 8 2500 tbd call ti call ti -40 to 125 (1) the marketing status values are defined as follows: active: product device recommended for new designs. lifebuy: ti has announced that the device will be discontinued, and a lifetime-buy period is in effect. nrnd: not recommended for new designs. device is in production to support existing customers, but ti does not recommend using this part in a new design. preview: device has been announced but is not in production. samples may or may not be available. obsolete: ti has discontinued the production of the device. (2) rohs: ti defines "rohs" to mean semiconductor products that are compliant with the current eu rohs requirements for all 10 rohs substances, including the requirement that rohs substance do not exceed 0.1% by weight in homogeneous materials. where designed to be soldered at high temperatures, "rohs" products are suitable for use in specified lead-free processes. ti may reference these types of products as "pb-free". rohs exempt: ti defines "rohs exempt" to mean products that contain lead but are compliant with eu rohs pursuant to a specific eu rohs exemption. green: ti defines "green" to mean the content of chlorine (cl) and bromine (br) based flame retardants meet js709b low halogen requirements of <=1000ppm threshold. antimony trioxide based flame retardants must also meet the <=1000ppm threshold requirement. (3) msl, peak temp. - the moisture sensitivity level rating according to the jedec industry standard classifications, and peak solder temperature. (4) there may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) multiple device markings will be inside parentheses. only one device marking contained in parentheses and separated by a "~" will appear on a device. if a line is indented then it is a continuation of the previous line and the two combined represent the entire device marking for that device. (6) lead/ball finish - orderable devices may have multiple material finish options. finish options are separated by a vertical ruled line. lead/ball finish values may wrap to two lines if the finish value exceeds the maximum column width. important information and disclaimer: the information provided on this page represents ti's knowledge and belief as of the date that it is provided. ti bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. efforts are underway to better integrate information from third parties. ti has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ti and ti suppliers consider certain information to be proprietary, and thus cas numbers and other limited information may not be available for release. in no event shall ti's liability arising out of such information exceed the total purchase price of the ti part(s) at issue in this document sold by ti to customer on an annual basis.
package option addendum www.ti.com 28-jun-2017 addendum-page 2 other qualified versions of OPA1641-Q1, opa1642-q1 : ? catalog: opa1641 , opa1642 note: qualified version definitions: ? catalog - ti's standard catalog product

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designers ? ) understand and agree that designers remain responsible for using their independent analysis, evaluation and judgment in designing their applications and that designers have full and exclusive responsibility to assure the safety of designers ' applications and compliance of their applications (and of all ti products used in or for designers ? applications) with all applicable regulations, laws and other applicable requirements. designer represents that, with respect to their applications, designer has all the necessary expertise to create and implement safeguards that (1) anticipate dangerous consequences of failures, (2) monitor failures and their consequences, and (3) lessen the likelihood of failures that might cause harm and take appropriate actions. designer agrees that prior to using or distributing any applications that include ti products, designer will thoroughly test such applications and the functionality of such ti products as used in such applications. ti ? s provision of technical, application or other design advice, quality characterization, reliability data or other services or information, including, but not limited to, reference designs and materials relating to evaluation modules, (collectively, ? ti resources ? ) are intended to assist designers who are developing applications that incorporate ti products; by downloading, accessing or using ti resources in any way, designer (individually or, if designer is acting on behalf of a company, designer ? s company) agrees to use any particular ti resource solely for this purpose and subject to the terms of this notice. ti ? s provision of ti resources does not expand or otherwise alter ti ? s applicable published warranties or warranty disclaimers for ti products, and no additional obligations or liabilities arise from ti providing such ti resources. ti reserves the right to make corrections, enhancements, improvements and other changes to its ti resources. ti has not conducted any testing other than that specifically described in the published documentation for a particular ti resource. designer is authorized to use, copy and modify any individual ti resource only in connection with the development of applications that include the ti product(s) identified in such ti resource. no other license, express or implied, by estoppel or otherwise to any other ti intellectual property right, and no license to any technology or intellectual property right of ti or any third party is granted herein, including but not limited to any patent right, copyright, mask work right, or other intellectual property right relating to any combination, machine, or process in which ti products or services are used. information regarding or referencing third-party products or services does not constitute a license to use such products or services, or a warranty or endorsement thereof. use of ti resources may require a license from a third party under the patents or other intellectual property of the third party, or a license from ti under the patents or other intellectual property of ti. ti resources are provided ? as is ? and with all faults. ti disclaims all other warranties or representations, express or implied, regarding resources or use thereof, including but not limited to accuracy or completeness, title, any epidemic failure warranty and any implied warranties of merchantability, fitness for a particular purpose, and non-infringement of any third party intellectual property rights. ti shall not be liable for and shall not defend or indemnify designer against any claim, including but not limited to any infringement claim that relates to or is based on any combination of products even if described in ti resources or otherwise. in no event shall ti be liable for any actual, direct, special, collateral, indirect, punitive, incidental, consequential or exemplary damages in connection with or arising out of ti resources or use thereof, and regardless of whether ti has been advised of the possibility of such damages. unless ti has explicitly designated an individual product as meeting the requirements of a particular industry standard (e.g., iso/ts 16949 and iso 26262), ti is not responsible for any failure to meet such industry standard requirements. where ti specifically promotes products as facilitating functional safety or as compliant with industry functional safety standards, such products are intended to help enable customers to design and create their own applications that meet applicable functional safety standards and requirements. using products in an application does not by itself establish any safety features in the application. designers must ensure compliance with safety-related requirements and standards applicable to their applications. designer may not use any ti products in life-critical medical equipment unless authorized officers of the parties have executed a special contract specifically governing such use. life-critical medical equipment is medical equipment where failure of such equipment would cause serious bodily injury or death (e.g., life support, pacemakers, defibrillators, heart pumps, neurostimulators, and implantables). such equipment includes, without limitation, all medical devices identified by the u.s. food and drug administration as class iii devices and equivalent classifications outside the u.s. ti may expressly designate certain products as completing a particular qualification (e.g., q100, military grade, or enhanced product). designers agree that it has the necessary expertise to select the product with the appropriate qualification designation for their applications and that proper product selection is at designers ? own risk. designers are solely responsible for compliance with all legal and regulatory requirements in connection with such selection. designer will fully indemnify ti and its representatives against any damages, costs, losses, and/or liabilities arising out of designer ? s non- compliance with the terms and provisions of this notice. mailing address: texas instruments, post office box 655303, dallas, texas 75265 copyright ? 2017, texas instruments incorporated

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