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EL8186
Data Sheet August 23, 2005 FN7455.4
Micropower Single Supply Rail-to-Rail Input-Output Op Amp
The EL8186 is a micropower operational amplifier optimized for single supply operation at 5V and can operate down to 2.4V. The EL8186 draws minimal supply current while meeting excellent DC-accuracy noise and output drive specifications. Competing devices seriously degrade these parameters to achieve micropower supply current. Offset current, voltage and current noise, slew rate, and gain-bandwidth product are all two to ten times better than on previous micropower op amps. The EL8186 can be operated from one lithium cell or two Ni-Cd batteries. The input range includes both positive and negative rail. The output swings to both rails.
Features
* 55A supply current * 400V typical offset voltage * 500pA input bias current * 400kHz gain-bandwidth product * 1MHz -3dB bandwidth * 0.13V/s slew rate * Single supply operation down to 2.4V * Rail-to-rail input and output * Output sources and sinks 26mA load current * Pb-Free plus anneal available (RoHS compliant)
Applications
* Battery- or solar-powered systems * 4mA to 25mA current loops * Handheld consumer products * Medical devices * Thermocouple amplifiers * Photodiode pre amps * pH probe amplifiers
Ordering Information
PART NUMBER (BRAND) EL8186IW-T7 (BBJA) EL8186IW-T7A (BBJA) EL8186IWZ-T7 (BBJA) (Note) EL8186IWZ-T7A (BBJA) (Note) EL8186ISZ (Note) EL8186ISZ-T7 (Note) EL8186ISZ-T13 (Note) PACKAGE 6-Pin SOT-23 6-Pin SOT-23 6-Pin SOT-23 (Pb-free) 6-Pin SOT-23 (Pb-free) 8-Pin SO (Pb-free) 8-Pin SO (Pb-free) 8-Pin SO (Pb-free) TAPE & REEL 7" (3K pcs) 7" (250 pcs) 7" (3K pcs) 7" (250 pcs) 7" 13" PKG. DWG. # MDP0038 MDP0038 MDP0038 MDP0038 MDP0027 MDP0027
Pinouts
EL8186 (6-PIN SOT-23) TOP VIEW
OUT 1 6 VS+ +5 ENABLE 4 IN-
MDP0027
VS- 2 IN+ 3
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
EL8186 (8-PIN SO) TOP VIEW
NC 1 IN- 2 IN+ 3 VS- 4 + 8 ENABLE 7 VS+ 6 VOUT 5 NC
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2004, 2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
EL8186
Absolute Maximum Ratings (TA = 25C)
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V Differential Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to VS + 0.5V Output Short-Circuit Duration . . . . . . . . . . . . . . . . . . . . . . .Indefinite Ambient Operating Temperature Range . . . . . . . . . .-40C to +85C Storage Temperature Range . . . . . . . . . . . . . . . . . .-65C to +150C
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA
Electrical Specifications
PARAMETER VOS V OS --------------T IOS IB eN iN CMIR CMRR PSRR AVOL
VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = 25C unless otherwise specified. CONDITIONS MIN TYP 0.4 1 0.4 0.5 fO = 1kHz fO = 1kHz Guaranteed by CMRR test VCM = 0V to 5V VS = 2.4V to 5V VO = 0.5V to 4.5V, RL = 100k VO = 0.5V to 4.5V, RL = 1k 0 90 90 200 110 110 500 25 3 130 4.994 4.8 0.09 fO = 100kHz Unity gain, CLOAD = 27pF, RF = 100 40 4.997 4.88 0.13 400 1 55 3 RL = 10 RL = 10 18 17 31 26 2.2 2.4 2 0.8 VEN = 5V VEN = 0V 0.25 -0.5 0.7 0 2 +0.5 75 10 0.17 6 200 25 0.1 5 2 3 MAX 1 UNIT mV V/C nA nA nV/Hz pA/Hz V dB dB V/mV V/mV mV mV V V V/s kHz MHz A A mA mA V V V A A
DESCRIPTION Input Offset Voltage Input Offset Drift vs Temperature Input Offset Current Input Bias Current Input Noise Voltage Density Input Noise Current Density Input Voltage Range Common-Mode Rejection Ratio Power Supply Rejection Ratio Large Signal Voltage Gain
VOUT
Maximum Output Voltage Swing
Output low, RL = 100k Output low, RL = 1k Output high, RL = 100k Output high, RL = 1k
SR GBW BW IS,ON IS,OFF IO+ IOVS VINH VINL IENH IENL
Slew Rate Gain Bandwidth Product -3dB Bandwidth Supply Current, Enabled Supply Current, Disabled Short Circuit Output Current Short Circuit Output Current Minimum Supply Voltage Enable Pin High Level Enable Pin Low Level Enable Pin Input Current Enable Pin Input Current
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FN7455.4 August 23, 2005
EL8186 Typical Performance Curves
6 VS=1.25V GAIN (dB) 45 40 3 35 30 GAIN (dB) 0 VS=2.5V -3 AV=1 CL=27pF RF=100 RG=OPEN 10K VS=1.0V 25 20 AV=100 15 RL=10k CL=2.7pF 10 R /R =99.02 FG RF=221k 5 RG=2.23k 0 100 1K VS=2.5V VS=1.25V VS=1.0V
-6
-9 1K
100K 1M FREQUENCY (Hz)
10M
10K FREQUENCY (Hz)
100K
1M
FIGURE 1. UNITY GAIN FREQUENCY RESPONSE vs SUPPLY VOLTAGE
FIGURE 2. FREQUENCY RESPONSE vs SUPPLY VOLTAGE
60 50 40 30 20 10 0 INPUT OFFSET VOLTAGE (V)
200
VCM=VDD/2 150 AV=-1 100 50 0 -50 -100 -150 -200 0 1 2 3 4 5 VDD=2.5V VDD=5V
SUPPLY CURRENT (A)
2
2.5
3
3.5
4
4.5
5
5.5
SUPPLY VOLTAGE (V)
OUTPUT VOLTAGE (V)
FIGURE 3. SUPPLY CURRENT vs SUPPLY VOLTAGE
FIGURE 4. INPUT OFFSET VOLTAGE vs OUTPUT VOLTAGE
-20
VOS, V
INPUT BIAS, OFFSET CURRENTS (pA)
0 INPUT OFFSET VOLTAGE (V)
10K
1K
IB+
-40
100
IOS
IB-
-60
-80
10
-100
0
1
2
3
4
5
1
0
1
2
3
4
5
COMMON-MODE INPUT VOLTAGE (V)
COMMON-MODE INPUT VOLTAGE (V)
FIGURE 5. INPUT OFFSET VOLTAGE vs COMMON-MODE INPUT VOLTAGE
FIGURE 6. INPUT BIAS + OFFSET CURRENTS vs COMMONMODE INPUT VOLTAGE
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FN7455.4 August 23, 2005
EL8186 Typical Performance Curves
100 80 PHASE 60 GAIN (dB) 40 0 20 0 -20 10 GAIN -50 -100 100 1K 10K 100K -150 1M -40 -80
(Continued)
200 150 100 PHASE () 50 40 0 PHASE () GAIN (dB) 120 80
80
40
0
-40
-80
1
10
100
1K
10K
100K
1M
-120 10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 7. AVOL vs FREQUENCY @ 1k LOAD
FIGURE 8. AVOL vs FREQUENCY @ 100k LOAD
120 110 100 90 80 PSRR (dB) 70 60 50 40 30 20 10 0 1 10 100 1K 10K 100K 1M PSRRPSRR+ CMRR (dB)
120 110 100 90 80 70 60 50 40 30 20 10 0 1 10 100 1K 10K 100K 1M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 9. PSRR vs FREQUENCY
FIGURE 10. CMRR vs FREQUENCY
1K CURRENT NOISE (pA/Hz) 100 1K FREQUENCY (Hz) 10K 100K VOLTAGE NOISE (nV/Hz)
10.00
100
1.00
10
0.10
1 10
0.01 1
10
100
1K
10K
100K
FREQUENCY (Hz)
FIGURE 11. VOLTAGE NOISE vs FREQUENCY
FIGURE 12. CURRENT NOISE vs FREQUENCY
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FN7455.4 August 23, 2005
EL8186 Typical Performance Curves
500 INPUT OFFSET VOLTAGE (V) 400 300 200 100 0 -100 -200 -300 -400 -500 -50 0 50 100 100 95 90 -50 0 50 TEMPERATURE (C) 100 PSRR (dB) 120 115 110 105 SOT23-6 PACKAGE 10 SAMPLES
(Continued)
130 125 SOT23-6 PACKAGE
TEMPERATURE (C)
FIGURE 13. VOS vs TEMPERATURE
FIGURE 14. PSRR vs TEMPERATURE
120 115 110 105 100 95 90 -60 SOT23-6 PACKAGE
130 SOT23-6 PACKAGE 125 OPEN LOOP GAIN (dB) -40 -20 0 20 40 60 80 100 120 115 110 105 100 -60
CMRR (dB)
-40
-20
0
20
40
60
80
100
TEMPERATURE (C)
TEMPERATURE (C)
FIGURE 15. CMRR vs TEMPERATURE
FIGURE 16. AVOL vs TEMPERATURE
2000 1500 1000 IB (pA) IS (mA) 500 0 -500 -1000 -1500 -60 SOT23-6 PACKAGE
70 65 60 55 50 45 40 35 30 -40 -20 0 20 40 60 80 100 TEMPERATURE (C) -60 -40 -20 0 20 40 60 TEMPERATURE (C) 80 100 SOT23-6 PACKAGE
FIGURE 17. IB vs TEMPERATURE
FIGURE 18. IS vs TEMPERATURE
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FN7455.4 August 23, 2005
EL8186 Typical Performance Curves
(Continued)
1 POWER DISSIPATION (W)
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD 909mW
J 8 /W S O 0 C 1 =1
A
0.7 POWER DISSIPATION (W)
JEDEC JESD51-3 LOW EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD
0.8
0.6 625mW
J
0.5 0.4 391mW 0.3 0.2 0.1 0 0
8 /W SO 0 C 6 =1
A
0.6 435mW 0.4
J
SO
A =2
30
T2 3 C
JA =
-6
SO T2 36 25 6 C/ W
0.2
/W
0
0
25
50
75 85 100
125
150
25
50
75 85 100
125
150
AMBIENT TEMPERATURE (C)
AMBIENT TEMPERATURE (C)
FIGURE 19. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE
FIGURE 20. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE
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FN7455.4 August 23, 2005
EL8186 Applications Information
Introduction
The EL8186 is a rail-to-rail input and output micro-power single supply operational amplifier with an enable feature. The device achieves rail-to-rail input and output operation and eliminates the concerns introduced by a conventional rail-to-rail input and output operational amplifier.
Rail-to-Rail Output
A pair of complementary MOSFET devices achieves rail-torail output swing. The NMOS sinks current to swing the output in the negative direction. The PMOS sources current to swing the output in the positive direction. The EL8186 with a 100k load will swing to within 3mV of the supply rails.
Enable/Disable Feature
The EL8186 offers an EN pin. The active low enable pin disables the device when pulled up to at least 2.2V. Upon disable the part consumes typically 3A, while the output is in a high impedance state. The EN also has an internal pull down. If left open, the EN pin will pull to negative rail and the device will be enabled by default. The high impedance at output during disable allows multiple EL8186s to be connected together as a MUX. The outputs are tied together in parallel and a channel can be selected by the EN pin.
Rail-to-Rail Input
The input common-mode voltage range of the EL8186 goes from negative supply to positive supply without introducing offset errors or degrading performance associated with a conventional rail-to-rail input operational amplifier. Many railto-rail input stages use two differential input pairs, a long-tail PNP (or PFET) and an NPN (or NFET). Severe penalties have to be paid for this topology. As the input signal moves from one supply rail to another, the operational amplifier switches from one input pair to the other causing drastic changes in input offset voltage and an undesired change in magnitude and polarity of input offset current. The EL8186 achieves input rail-to-rail performance without sacrificing important precision specifications and without degrading distortion performance. The EL8186's input offset voltage exhibits a smooth behavior throughout the entire common-mode input range. The input bias current versus the common-mode voltage range for the EL8186 gives consistent behavior from typically 10mV above the negative rail all the way up to the positive rail.
Typical Applications
R4 100k R3 R2 10k 10k V+ + EL8186 V-
K TYPE THERMOCOUPLE
+ 5V
410V/C
R1 100k
Input Bias Current Compensation
The input bias currents of the EL8186 are reduced to a typical 500pA while maintaining excellent bandwidth for a micro-power operational amplifier. Inside the EL8186 is an input bias cancelling circuit. The input stage transistors are still biased with an adequate amount of current for speed but the cancelling circuit sinks most of the base current, leaving a small fraction as input bias current. The input bias current compensation/cancellation operates from typically 10mV above the negative rail to the positive supply rail.
FIGURE 21. THERMOCOUPLE AMPLIFIER
Thermocouples are the most popular temperature-sensing device because of their low cost, interchangeability, and ability to measure a wide range of temperatures. The EL8186 is used to convert the differential thermocouple voltage into single-ended signal with 10X gain. The EL8186's rail-to-rail input characteristic allows the thermocouple to be biased at ground and the converter to run from a single 5V supply.
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FN7455.4 August 23, 2005
EL8186 SO Package Outline Drawing
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FN7455.4 August 23, 2005
EL8186 SOT-23 Package Outline Drawing
NOTE: The package drawing shown here may not be the latest version. To check the latest revision, please refer to the Intersil website at http://www.intersil.com/design/packages/index.asp
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com 9
FN7455.4 August 23, 2005

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