View BU7481G_9105220.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

www.rohm.com tsz02201-0rar0g200370-1-2 ? 2014 rohm co., ltd. all rights reserved. 1/18 17.jan.2014 rev.001 tsz22111 ? 14 ? 001 datashee t operational amplifiers high speed low voltage operation cmos operational amplifiers BU7481G bu7481sg general description the bu7481xx are input ground sense, output full swing, low voltage operation, low input offset voltage and high speed operational amplifiers. it has a mosfet input with a small input bias current of 1pa(typ), suitable for sensor amplifier applications. features ? low operating supply voltage ? high large signal voltage gain ? low input bias current ? high slew rate key specifications ? operating supply voltage (single supply): +1.8v to +5.5v ? slew rate: 3.2v/s ? temperature range: BU7481G -40c to +85c bu7481sg -40c to +105c ? input offset current: 1pa (typ) ? input bias current: 1pa (typ) package w(typ) x d(typ) x h(max) ssop5 2.90mm x 2.80mm x 1.25mm applications ? buffer ? active filter ? sensor amplifier ? mobile equipment pin configuration BU7481G, bu7481sg : ssop5 pin no. pin name 1 in+ 2 vss 3 in- 4 out 5 vdd package ssop5 BU7481G bu7481sg ordering information b u 7 4 8 1 x x - t r part number BU7481G bu7481sg package g:ssop5 packaging and forming specification tr: embossed tape and reel 1 - + 2 3 4 5 vss in- in+ vdd out product structure silicon monolithic integrated circuit this product has no designed protec tion against radioactive rays. downloaded from: http:///
datasheet www.rohm.com tsz02201-0rar0g200370-1-2 ? 2014 rohm co., ltd. all rights reserved. 2/18 17.jan.2014 rev.001 tsz22111 ? 15 ? 001 BU7481G bu7481sg line-up t opr package orderable part number -40c to +85c ssop5 reel of 3000 BU7481G-tr -40c to +105c ssop5 reel of 3000 bu7481sg-tr absolute maximum ratings (t a =25c) parameter symbol rating unit BU7481G bu7481sg supply voltage vdd - vss +7 v power dissipation p d 0.54 (note 1,2) w differential input voltage (note 3) v id vdd - vss v input common-mode voltage range v icm (vss - 0.3) to (vdd + 0.3) v input current (note 4) i i 10 ma operating supply voltage v opr +1.8 to +5.5 v operating temperature t opr - 40 to +85 - 40 to +105 c storage temperature t stg - 55 to +125 c maximum junction temperature t jmax +125 c (note 1) to use at temperature above t a =25 ? c reduce 5.4mw. (note 2) mounted on a fr4 glas s epoxy pcb 70mm70mm1.6mm (copper foil area less than 3%). (note 3) the voltage difference between inverting input and non-inverting input is the differential input voltage. then input pin voltage is set to more than vss. (note 4) an excessive input current will flow when input voltages of more than vdd+0.6v or less than vss-0.6v are applied. the input current can be set to less than the rated current by adding a limiting resistor. caution: operating the ic over the absolute maximum ratings may damage the ic. the damage can either be a short circuit between pins or an open circuit between pins and the internal circuitry. therefore, it is important to consider circuit protection measures, such as ad ding a fuse, in case the ic is operated over the absolute maximum ratings. downloaded from: http:///
datasheet www.rohm.com tsz02201-0rar0g200370-1-2 ? 2014 rohm co., ltd. all rights reserved. 3/18 17.jan.2014 rev.001 tsz22111 ? 15 ? 001 BU7481G bu7481sg electrical characteristics BU7481G, bu7481sg (unless otherwise specified vdd=+3v, vss=0v, t a =25c) parameter symbol temperature range limit unit conditions min typ max input offset voltage (note 5) v io 25c - 1 8 mv - input offset current (note 5) i io 25c - 1 - pa - input bias current (note 5) i b 25c - 1 - pa - supply current (note 6) i dd 25c - 420 750 a r l = a v =0db, in+=0.9v full range - - 900 high level output voltage v oh 25c vdd-0.1 - - v r l =10k ? low level output voltage v ol 25c - - vss+0.1 v r l =10k ? large signal voltage gain av 25c 70 105 - db r l =10k ? input common-mode voltage range v icm 25c 0 - 1.8 v vss to vdd-1.2v common-mode rejection ratio cmrr 25c 45 60 - db - power supply rejection ratio psrr 25c 60 80 - db - output source current (note 7) i source 25c 5 8 - ma out=vdd-0.4v output sink current (note 7) i sink 25c 9 16 - ma out=vss+0.4v slew rate sr 25c - 3.2 - v/ sc l =25pf unity gain frequency f t 25c - 2.8 - mhz c l =25pf, a v =40db phase margin 25c - 50 - deg c l =25pf, a v =40db total harmonic distortion + noise thd+n 25c - 0.03 - % out=0.8v p-p , f=1khz (note 5) absolute value (note 6) full range bu7481: t a =-40c to +85c bu7481s: t a =-40c to +105c (note 7) consider the power dissipation of the ic under high temperature environment when selecting the output current value. there may be a case where the output current value is reduced due to the rise in ic temperature caused by the heat generated i nside the ic. downloaded from: http:///
datasheet www.rohm.com tsz02201-0rar0g200370-1-2 ? 2014 rohm co., ltd. all rights reserved. 4/18 17.jan.2014 rev.001 tsz22111 ? 15 ? 001 BU7481G bu7481sg description of electrical characteristics described below are descriptions of the rele vant electrical terms used in this datasheet. items and symbols used are also shown. note that item name and symbol and their meaning ma y differ from those on another manufacturers document or general document. 1. absolute maximum ratings absolute maximum rating items indicate the condition which must not be exceeded. application of voltage in excess of absolute maximum rating or use out of absolute maximum rated temperature environment may cau se deterioration of characteristics. (1) supply voltage (vdd/vss) indicates the maximum voltage that can be applied between the vdd terminal and vss terminal without deterioration or destruction of characteristics of internal circuit. (2) differential input voltage (v id ) indicates the maximum voltage that can be applied betw een non-inverting and inverting terminals without damaging the ic. (3) input common-mode voltage range (v icm ) indicates the maximum voltage that can be applied to the non-inverting and inverting terminals without deterioration or destruction of electrical characteristics. input common-mode voltage range of the maximum ratin gs does not assure normal operation of ic. for normal operation, use the ic within the input co mmon-mode voltage range characteristics. (4) power dissipation (p d ) indicates the power that can be consumed by the ic when mo unted on a specific board at t he ambient temperature 25c (normal temperature). as for package product, p d is determined by the temperature that can be permitted by the ic in the package (maximum junction temperature) and the thermal resistance of the package. 2. electrical characteristics (1) input offset voltage (v io ) indicates the voltage difference between non-inverting termi nal and inverting terminals. it can be translated into the input voltage difference required for setting the output voltage at 0 v. (2) input offset current (i io ) indicates the difference of input bias current bet ween the non-inverting and inverting terminals. (3) input bias current (i b ) indicates the current that flows into or out of the input terminal. it is defined by the average of input bias currents at the non-inverting and inverting terminals. (4) supply current (i dd ) indicates the current that flows within the ic under specified no-load conditions. (5) high level output voltage (high) / low level output voltage (low) (voh/vol) indicates the voltage range of the outpu t under specified load condition. it is typically divided into maximum output voltage high and low. maximum output voltage high indicate s the upper limit of output voltage. maximum output voltage low indicates the lower limit. (6) large signal voltage gain (a v ) indicates the amplifying rate (gain) of output voltage against the voltage difference between non-inverting terminal and inverting terminal. it is normally the amplifying rate (gain) with reference to dc voltage. a v = (output voltage) / (differential input voltage) (7) input common-mode voltage range (v icm ) indicates the input voltage range where ic normally operates. (8) common-mode rejection ratio (cmrr) indicates the ratio of fluctuation of input offset voltage when the input common mode voltage is changed. it is normally the fluctuation of dc. cmrr = (change of input common-mode voltage)/(input offset fluctuation) (9) power supply rejection ratio (psrr) indicates the ratio of fluctuation of input offset voltage when supply voltage is changed. it is normally the fluctuation of dc. psrr = (change of power supply volta ge)/(input offset fluctuation) (10) output source current/ output sink current (i source / i sink ) the maximum current that c an be output from the ic under specific output conditions. the output source current indicates the current flowing out from the ic, and the output sink current indica tes the current flowing into the ic. (11) slew rate (sr) indicates the ratio of the change in output voltage wi th time when a step input signal is applied. (12) unity gain frequency (f t ) indicates a frequency where the voltage gain of operational amplifier is 1. (13) phase margin ( ) indicates the margin of phase from 180 de gree phase lag at unity gain frequency. (14) total harmonic distortion + noise (thd+n) indicates the fluctuation of input offset vo ltage or that of output voltage with reference to the change of output voltage of driven channel. downloaded from: http:///
datasheet www.rohm.com tsz02201-0rar0g200370-1-2 ? 2014 rohm co., ltd. all rights reserved. 5/18 17.jan.2014 rev.001 tsz22111 ? 15 ? 001 BU7481G bu7481sg typical performance curves BU7481G, bu7481sg (*) the above characteristics are measurements of typical sample, they are not guaranteed. BU7481G: -40c to +85 c bu7481sg: -40 c to +105 c 0 200 400 600 800 -50 -25 0 25 50 75 100 125 ambient temperature [c] supply current [ a] 0 200 400 600 800 123456 supply voltage [v] supply current [ a] 0.0 0.2 0.4 0.6 0.8 1.0 0 25 50 75 100 125 ambient temperature [c] power dissipation [w] 0.0 0.2 0.4 0.6 0.8 1.0 0 25 50 75 100 125 ambient temperature [c] power dissipation [w] 85 figure 1. power dissipation vs ambient temperature (derating curve) figure 2. power dissipation vs ambient temperature (derating curve) figure 3. supply current vs supply voltage figure 4. supply current vs ambient temperature -40 c 25 c 85 c 105 c 1.8v 5.5v 3.0v BU7481G bu7481sg 105 downloaded from: http:///
datasheet www.rohm.com tsz02201-0rar0g200370-1-2 ? 2014 rohm co., ltd. all rights reserved. 6/18 17.jan.2014 rev.001 tsz22111 ? 15 ? 001 BU7481G bu7481sg typical performance curves - continued BU7481G, bu7481sg (*) the above characteristics are measurements of typical sample, they are not guaranteed. BU7481G: -40c to +85 c bu7481sg: -40 c to +105 c 0 1 2 3 4 5 6 123456 supply voltage [v] maximum output voltage (high) [v] 0 5 10 15 20 123456 supply voltage [v] maximum output voltage (low) [mv] 0 1 2 3 4 5 6 -50 -25 0 25 50 75 100 125 ambient temperature [c] maximum output voltage (high) [v] 0 5 10 15 20 - 5 0- 2 5 0 2 55 07 51 0 01 2 5 ambient temperature [c] maximum output voltage (low) [mv] figure 7. maximum output voltage (low) vs supply voltage (r l =10k ? ) figure 5. maximum output voltage (high) vs supply voltage (r l =10k ? ) figure 6. maximum output voltage (high) vs ambient temperature (r l =10k ? ) figure 8. maximum output voltage (low) vs ambient temperature (r l =10k ? ) -40 c 25 c 85 c 105 c 1.8v 5.5v 3.0v -40 c 25 c 85 c 105 c 1.8v 5.5v 3.0v downloaded from: http:///
datasheet www.rohm.com tsz02201-0rar0g200370-1-2 ? 2014 rohm co., ltd. all rights reserved. 7/18 17.jan.2014 rev.001 tsz22111 ? 15 ? 001 BU7481G bu7481sg figure 10. output source current vs ambient temperature (out=vdd-0.4v) typical performance curves - continued BU7481G, bu7481sg (*) the above characteristics are measurements of typical sample, they are not guaranteed. BU7481G: -40c to +85 c bu7481sg: -40 c to +105 c 0 10 20 30 40 -50 -25 0 25 50 75 100 125 ambient temperature [c] output source current [ma] 0 10 20 30 40 0.0 0.5 1.0 1.5 2.0 2.5 3.0 output voltage [v] output source current [ma] 0 20 40 60 80 -50 -25 0 25 50 75 100 125 ambient temperature [c] output sink current [ma] 0 20 40 60 80 0.0 0.5 1.0 1.5 2.0 2.5 3.0 output voltage [v] output sink current [ma] figure 12. output sink current vs ambient temperature (out=vss+0.4v) figure 11. output sink current vs output voltage (vdd=3v) figure 9. output source current vs output voltage (vdd=3v) -40 c 25 c 85 c 105 c 1.8v 5.5v 3.0v -40 c 25 c 85 c 105 c 1.8v 5.5v 3.0v downloaded from: http:///
datasheet www.rohm.com tsz02201-0rar0g200370-1-2 ? 2014 rohm co., ltd. all rights reserved. 8/18 17.jan.2014 rev.001 tsz22111 ? 15 ? 001 BU7481G bu7481sg typical performance curves - continued BU7481G, bu7481sg (*) the above characteristics are measurements of typical sample, they are not guaranteed. BU7481G: -40c to +85 c bu7481sg: -40 c to +105 c -5 -4 -3 -2 -1 0 1 2 3 4 5 123456 supply voltage [v] input offset voltage [mv] -5 -4 -3 -2 -1 0 1 2 3 4 5 -50 -25 0 25 50 75 100 125 ambient temperature [c] input offset voltage [mv] -5 -4 -3 -2 -1 0 1 2 3 4 5 -1 0 1 2 3 input voltage [v] input offset voltage [mv] 60 80 100 120 140 160 123456 supply voltage [v] large signal voltage gain [db] figure 13. input offset voltage vs supply voltage (v icm =vdd-1.2v, e k =-vdd/2) figure 14. input offset voltage vs ambient temperature (v icm =vdd-1.2v, e k =-vdd/2) figure 15. input offset voltage vs input voltage (vdd=3v) figure 16. large signal voltage gain vs supply voltage -40 c 25 c 85 c 105 c 5.5v 1.8v 3.0v -40 c 25 c 85 c 105 c -40 c 25 c 85 c 105 c downloaded from: http:///
datasheet www.rohm.com tsz02201-0rar0g200370-1-2 ? 2014 rohm co., ltd. all rights reserved. 9/18 17.jan.2014 rev.001 tsz22111 ? 15 ? 001 BU7481G bu7481sg typical performance curves - continued BU7481G, bu7481sg (*) the above characteristics are measurements of typical sample, they are not guaranteed. BU7481G: -40c to +85 c bu7481sg: -40 c to +105 c 60 80 100 120 140 160 -50 -25 0 25 50 75 100 125 ambient temperature [c] large signal voltage gain [db] 0 20 40 60 80 100 120 123456 supply voltage [v] common mode rejection ratio [db] 0 20 40 60 80 100 120 -50 -25 0 25 50 75 100 125 ambient temperature [c] common mode rejection ratio [db] 0 30 60 90 120 150 -50 -25 0 25 50 75 100 125 ambient temperature [c] power supply rejection ratio [db] figure 17. large signal voltage gain vs ambient temperature figure 18. common mode rejection ratio vs supply voltage figure 19. common mode rejection ratio vs ambient temperature figure 20. power supply rejection ratio vs ambient temperature 5.5v 1.8v 3.0v -40 c 25 c 85 c 105 c 5.5v 1.8v 3.0v downloaded from: http:///
datasheet www.rohm.com tsz02201-0rar0g200370-1-2 ? 2014 rohm co., ltd. all rights reserved. 10/18 17.jan.2014 rev.001 tsz22111 ? 15 ? 001 BU7481G bu7481sg typical performance curves - continued BU7481G, bu7481sg (*) the above characteristics are measurements of typical sample, they are not guaranteed. BU7481G: -40c to +85 c bu7481sg: -40 c to +105 c 0 2 4 6 8 10 -50 -25 0 25 50 75 100 125 ambient temperature [c] slew rate l-h [v/ s] 0 2 4 6 8 10 -50 -25 0 25 50 75 100 125 ambient temperature [c] slew rate h-l [v/ s] 0 20 40 60 80 frequency [hz] voltage gain [db] 0 50 100 150 200 phase [deg] figure 21. slew rate l-h vs ambient temperature figure 22. slew rate h-l vs ambient temperature figure 23. voltage gain ? phase vs frequency 5.5v 1.8v 3.0v 5.5v 1.8v 3.0v phase gain 10 2 10 3 10 4 10 5 10 6 10 7 10 8 downloaded from: http:///
datasheet www.rohm.com tsz02201-0rar0g200370-1-2 ? 2014 rohm co., ltd. all rights reserved. 11/18 17.jan.2014 rev.001 tsz22111 ? 15 ? 001 BU7481G bu7481sg application information null method condition for test circuit 1 vdd, vss, e k , v icm unit: v parameter v f sw1 sw2 sw3 vdd vss e k v icm calculation input offset voltage v f1 on on off 3 0 -1.5 1.8 1 large signal voltage gain v f2 on on on 3 0 -0.5 0.9 2 v f3 -2.5 common-mode rejection ratio (input common-mode voltage range) v f4 on on off 3 0 -1.5 0 3 v f5 1.8 power supply rejection ratio v f6 on on off 1.8 0 -0.9 0 4 v f7 on on off 5.5 - calculation - 1. input offset voltage (v io ) 2. large signal voltage gain (a v ) 3. common-mode rejection ration (cmrr) 4. power supply rejection ratio (psrr) figure 24 . test circuit 1 v icm r s =50 ? r s =50 ? r f =50k ? r i =1m ? r i =1m ? 0.015 f 0.015 f sw1 sw2 50k ? sw3 r l v rl 0.1 f e k 500k ? 500k ? 1000pf v f 0.01 f 15v -15v vdd vss vo v null dut |v f5 - v f4 | cmrr = 20log ? v icm (1+r f /r s ) [db] a v = 20log |v f3 - v f2 | ? e k (1+r f /r s ) [db] psrr = 20log |v f7 - v f6 | ? vdd (1+ r f /r s ) [db] v io = 1 + r f /r s [v] |v f1 | downloaded from: http:///
datasheet www.rohm.com tsz02201-0rar0g200370-1-2 ? 2014 rohm co., ltd. all rights reserved. 12/18 17.jan.2014 rev.001 tsz22111 ? 15 ? 001 BU7481G bu7481sg application information - continued switch condition for test circuit 2 sw no. sw1 sw2 sw3 sw4 sw5 sw6 sw7 sw8 sw9 sw10 sw11 sw12 supply current off off on off on off off off off off off off maximum output voltage (r l =10k ? ) off on off off on off off on off off on off output current off on off off on off off off off on off off slew rate off off on off off off on off on off off on unity gain frequency on off off on on off off off on off off on figure 25. test circuit 2 sw3 sw1 sw2 sw9 sw10 sw11 sw8 sw5 sw6 sw7 c l sw12 sw4 r1=1k ? r2=100k ? r l vss vdd out in- in+ v rl figure 26. slew rate input and output wave sr= ? v/ ? t output voltage ? t t ? v 10% 90% 1.8v 0v output wave input voltage t 1.8v p-p 1.8v 0v input wave downloaded from: http:///
datasheet www.rohm.com tsz02201-0rar0g200370-1-2 ? 2014 rohm co., ltd. all rights reserved. 13/18 17.jan.2014 rev.001 tsz22111 ? 15 ? 001 BU7481G bu7481sg examples of circuit voltage follower inverting amplifier non-inverting amplifier figure 28. inverting amplifier circuit figure 29. non-inverting amplifier circuit figure 27. voltage follower circuit out vss in vdd vss r2 vdd in out r1 r2 r1 out vss in vdd voltage gain is 0db. using this circuit, the output voltage (out) is configured to be equal to the input voltage (in). this circuit also stabilizes the output voltage (out) due to high input impedance and low output impedance. computation for output voltage (out) is shown below. out=in for inverting amplifier, input voltage (in) is amplified by a voltage gain and depends on the ratio of r1 and r2. the out-of-phase output voltage is shown in the next expression out=-(r2/r1) ? in this circuit has input impedance equal to r1. for non-inverting amplifier, input voltage (in) is amplified by a voltage gain, which depends on the ratio of r1 and r2. the output voltage (out) is in-phase with the input voltage (in) and is shown in the next expression. out=(1 + r2/r1) ? in effectively, this circuit has high input impedance since its input side is the same as that of the operational amplifier. downloaded from: http:///
datasheet www.rohm.com tsz02201-0rar0g200370-1-2 ? 2014 rohm co., ltd. all rights reserved. 14/18 17.jan.2014 rev.001 tsz22111 ? 15 ? 001 BU7481G bu7481sg power dissipation power dissipation (total loss) indicates the power that the ic can consume at t a =25c (normal temperature). as the ic consumes power, it heats up, causing its temperature to be higher than the ambient temperature. the allowable temperature that the ic can accept is limited. this depends on the circuit configuration, manufacturing process, and consumable power. power dissipation is determined by the allowable temperature within the ic (maximum junction temperature) and the thermal resistance of the package used (heat dissipation capabilit y). maximum junction temperature is typically equal to the maximum storage temperature. the heat generated through the consumption of power by the ic radiates from the mold resin or lead frame of the package. thermal resistance, represented by the symbol ja c/w, indicates this heat dissipation capability. similarly, the temperature of an ic inside its package can be estimated by thermal resistance. figure 30(a) shows the model of the thermal resistance of a package. the equation below shows how to compute for the thermal resistance ( ja ), given the ambient temperature (t a ), maximum junction temperature (t jmax ), and power dissipation (p d ). ja = (t jmax -t a ) / p d c/w the derating curve in figure 30(b) indicates the power that the ic can consume with reference to ambient temperature. power consumption of the ic begins to attenuate at certain temperatures. this gradient is determined by thermal resistance ( ja ), which depends on the chip size, power consumption, package, ambient temperature, package condition, wind velocity, etc. this may also vary even when the same of package is used. thermal reduction curve indicates a reference value measured at a specified condition. figure 30( c) and (d) shows an example of the derating curve for BU7481G and bu7481sg. when using the unit above t a =25c, subtract the value above per c . permissible dissipation is the value when fr4 glass epoxy board 70mm 70mm 1.6mm (copper foil area below 3%) is mounted 5.4 mw/c figure 30. thermal resistance and derating curve 0.0 0.2 0.4 0.6 0.8 1.0 0 25 50 75 100 125 ambient temperature [c] power dissipation [w] 0.0 0.2 0.4 0.6 0.8 1.0 0 25 50 75 100 125 ambient temperature [c] power dissipation [w] BU7481G bu7481sg (c) BU7481G (d) bu7481sg 85 105 ja =(t jmax -t a )/ p d c/w a mbient temperature t a [ c ] chip surface temperature t j [ c ] (a) thermal resistance (b) derating curve ambient temperature t a [ c ] power dissipation of lsi [w] p dmax ja2 < ja1 ja1 t jmax 0 50 75 100 125 25 p1 p2 ja2 power dissipation of ic downloaded from: http:///
datasheet www.rohm.com tsz02201-0rar0g200370-1-2 ? 2014 rohm co., ltd. all rights reserved. 15/18 17.jan.2014 rev.001 tsz22111 ? 15 ? 001 BU7481G bu7481sg operational notes 1. reverse connection of power supply connecting the power supply in reverse polarity can damage the ic. take precautions against reverse polarity when connecting the power supply, such as mounting an external diode between the power supply and the ics pow er supply pins. 2. power supply lines design the pcb layout pattern to provide low impedance supply lines. separate the ground and supply lines of the digital and analog blocks to prevent noise in the ground and supply lines of the digital bloc k from affecting the analog block. furthermore, connect a capacitor to ground at all power supply pins. consider the effect of temperature and aging on the capacitance value when using electrolytic capacitors. 3. ground voltage ensure that no pins are at a voltage below that of the ground pin at any time, even during transient condition. 4. ground wiring pattern when using both small-signal and large-current ground traces, the two ground traces should be routed separately but connected to a single ground at the reference point of the application board to avoid fluctuations in the small-signal ground caused by large currents. also ensure that the ground traces of external components do not cause variations on the ground voltage. the ground lines must be as short and thick as possible to reduce line impedance. 5. thermal consideration should by any chance the power dissipation rating be exceeded the rise in temperature of the chip may result in deterioration of the properties of the chip. the absolute maximum rating of the p d stated in this specification is when the ic is mounted on a 70mm x 70mm x 1.6mm glass epoxy board. in case of exceeding this absolute maximum rating, increase the board size and copper area to prevent exceeding the p d rating. 6. recommended operating conditions these conditions represent a range within which the expect ed characteristics of the ic can be approximately obtained. the electrical characteristics are guaranteed under the conditions of each parameter. 7. inrush current when power is first supplied to the ic, it is possible that the internal logic may be unstable and inrush current may flow instantaneously due to the internal powering sequence and delays, especially if the ic has more than one power supply. therefore, give special consideration to power coupling capacitance, power wiring, width of ground wiring, and routing of connections. 8. operation under strong electromagnetic field operating the ic in the presence of a strong electromagnetic field may cause the ic to malfunction. 9. testing on application boards when testing the ic on an application board, connecting a capacitor directly to a low-impedance output pin may subject the ic to stress. always discharge capacitors completely after each process or step. the ics power supply should always be turned off completely before connecting or removing it from the test setup during the inspection process. to prevent damage from static discharge, ground t he ic during assembly and use similar precautions during transport and storage. 10. inter-pin short and mounting errors ensure that the direction and position are correct when mounting the ic on the pcb. incorrect mounting may result in damaging the ic. avoid nearby pins being shorted to each ot her especially to ground, power supply and output pin. inter-pin shorts could be due to many reasons such as metal particles, water droplets (in very humid environment) and unintentional solder bridge deposited in between pins during assembly to name a few. 11. regarding the input pin of the ic in the construction of this ic, p-n junctions are inevit ably formed creating parasitic diodes or transistors. the operation of these parasitic elements can result in mutual interference among circuits, operational faults, or physical damage. therefore, conditions which cause these parasiti c elements to operate, such as applying a voltage to an input pin lower than the ground voltage should be avoided. furthermore, do not apply a vo ltage to the input pins when no power supply voltage is applied to the ic. even if the power supply voltage is applied, make sure that the input pins have voltages within the values specified in the electrical characteristics of this ic. 12. input voltage applying vdd+0.3v to the input terminal is possible without causing deterioration of the electrical characteristics or destruction, regardless of the supply voltage. however, this does not ensure normal circuit operation. please note that the circuit operates normally only when the input voltage is within the common mode input voltage range of the electric characteristics. downloaded from: http:///
datasheet www.rohm.com tsz02201-0rar0g200370-1-2 ? 2014 rohm co., ltd. all rights reserved. 16/18 17.jan.2014 rev.001 tsz22111 ? 15 ? 001 BU7481G bu7481sg operational notes C continued 13. power supply(single/dual) the operational amplifiers operate when the voltage supplied is between vdd an d vss. therefore, the single supply operational amplifiers can be used as dual supply operational amplifiers as well. 14. output capacitor if a large capacitor is connected between the output pin and vss pin, current from the charged capacitor will flow into the output pin and may destroy the ic when the vdd pin is shorted to ground or pulled down to 0v. use a capacitor smaller than 0.1f between output pin and vss pin. 15. oscillation by output capacitor please pay attention to the oscillation by output capacito r and in designing an applicat ion of negative feedback loop circuit with these ics. 16. latch up be careful of input voltage that exceed the vdd and vss. when cmos device have sometimes occur latch up and protect the ic from abnormaly noise. downloaded from: http:///
datasheet www.rohm.com tsz02201-0rar0g200370-1-2 ? 2014 rohm co., ltd. all rights reserved. 17/18 17.jan.2014 rev.001 tsz22111 ? 15 ? 001 BU7481G bu7481sg physical dimension, tape and reel information package name ssop5 downloaded from: http:///
datasheet www.rohm.com tsz02201-0rar0g200370-1-2 ? 2014 rohm co., ltd. all rights reserved. 18/18 17.jan.2014 rev.001 tsz22111 ? 15 ? 001 BU7481G bu7481sg e mie ? 2 b2 e marking diagram product name package type marking BU7481G ssop5 a3 bu7481sg d9 land pattern data all dimensions in mm pkg land pitch e land space mie land length R? 2 land width b2 ssop5 0.95 2.4 1.0 0.6 revision history date revision changes 17.jan.2014 001 new release part number marking ssop5(top view) lot number ssop5 downloaded from: http:///
datasheet d a t a s h e e t notice - ge rev.002 ? 2014 rohm co., ltd. all rights reserved. notice precaution on using rohm products 1. our products are designed and manufac tured for application in ordinary elec tronic equipments (such as av equipment, oa equipment, telecommunication equipment, home electroni c appliances, amusement equipment, etc.). if you intend to use our products in devices requiring ex tremely high reliability (such as medical equipment (note 1) , transport equipment, traffic equipment, aircraft/spacecra ft, nuclear power controllers, fuel c ontrollers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property (specific applications), please consult with the rohm sale s representative in advance. unless otherwise agreed in writing by rohm in advance, rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any ro hms products for specific applications. (note1) medical equipment classification of the specific applications japan usa eu china class class class b class class class 2. rohm designs and manufactures its products subject to strict quality control system. however, semiconductor products can fail or malfunction at a certain rate. please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe desi gn against the physical injury, damage to any property, which a failure or malfunction of our products may cause. the following are examples of safety measures: [a] installation of protection circuits or other protective devices to improve system safety [b] installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. our products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditio ns, as exemplified below. accordin gly, rohm shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of an y rohms products under any special or extraordinary environments or conditions. if you intend to use our products under any special or extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] use of our products in any types of liquid, incl uding water, oils, chemicals, and organic solvents [b] use of our products outdoors or in places where the products are exposed to direct sunlight or dust [c] use of our products in places where the products ar e exposed to sea wind or corrosive gases, including cl 2 , h 2 s, nh 3 , so 2 , and no 2 [d] use of our products in places where the products are exposed to static electricity or electromagnetic waves [e] use of our products in proximity to heat-producing components, plastic cords, or other flammable items [f] sealing or coating our products with resin or other coating materials [g] use of our products without cleaning residue of flux (ev en if you use no-clean type fluxes, cleaning residue of flux is recommended); or washing our products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] use of the products in places subject to dew condensation 4. the products are not subjec t to radiation-proof design. 5. please verify and confirm characteristics of the final or mounted products in using the products. 6. in particular, if a transient load (a large amount of load applied in a short per iod of time, such as pulse. is applied, confirmation of performance characteristics after on-boar d mounting is strongly recomm ended. avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading c ondition may negatively affect product performance and reliability. 7. de-rate power dissipation (pd) depending on ambient temper ature (ta). when used in seal ed area, confirm the actual ambient temperature. 8. confirm that operation temperat ure is within the specified range described in the product specification. 9. rohm shall not be in any way responsible or liable for fa ilure induced under deviant condi tion from what is defined in this document. precaution for mounting / circuit board design 1. when a highly active halogenous (chlori ne, bromine, etc.) flux is used, the resi due of flux may negatively affect product performance and reliability. 2. in principle, the reflow soldering method must be used; if flow soldering met hod is preferred, please consult with the rohm representative in advance. for details, please refer to rohm mounting specification downloaded from: http:///
datasheet d a t a s h e e t notice - ge rev.002 ? 2014 rohm co., ltd. all rights reserved. precautions regarding application examples and external circuits 1. if change is made to the constant of an external circuit, pl ease allow a sufficient margin considering variations of the characteristics of the products and external components, including transient characteri stics, as well as static characteristics. 2. you agree that application notes, re ference designs, and associated data and in formation contained in this document are presented only as guidance for products use. theref ore, in case you use such information, you are solely responsible for it and you must exercise your own independent verification and judgment in the use of such information contained in this document. rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. precaution for electrostatic this product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. please take proper caution in your manufacturing process and storage so that voltage exceeding t he products maximum rating will not be applied to products. please take special care under dry condit ion (e.g. grounding of human body / equipment / solder iron, isolation from charged objects, se tting of ionizer, friction prevention and temperature / humidity control). precaution for storage / transportation 1. product performance and soldered connections may deteriora te if the products are stor ed in the places where: [a] the products are exposed to sea winds or corros ive gases, including cl2, h2s, nh3, so2, and no2 [b] the temperature or humidity exceeds those recommended by rohm [c] the products are exposed to di rect sunshine or condensation [d] the products are exposed to high electrostatic 2. even under rohm recommended storage c ondition, solderability of products out of recommended storage time period may be degraded. it is strongly recommended to confirm sol derability before using products of which storage time is exceeding the recommended storage time period. 3. store / transport cartons in the co rrect direction, which is indicated on a carton with a symbol. otherwise bent leads may occur due to excessive stress applied when dropping of a carton. 4. use products within the specified time after opening a humidity barrier bag. baking is required before using products of which storage time is exceeding the recommended storage time period. precaution for product label qr code printed on rohm products label is for rohms internal use only. precaution for disposition when disposing products please dispose them proper ly using an authorized industry waste company. precaution for foreign exchange and foreign trade act since our products might fall under cont rolled goods prescribed by the applicable foreign exchange and foreign trade act, please consult with rohm representative in case of export. precaution regarding intellectual property rights 1. all information and data including but not limited to application example contained in this document is for reference only. rohm does not warrant that foregoi ng information or data will not infringe any intellectual property rights or any other rights of any third party regarding such information or data. rohm shall not be in any way responsible or liable for infringement of any intellectual property rights or ot her damages arising from use of such information or data.: 2. no license, expressly or implied, is granted hereby under any intellectual property rights or other rights of rohm or any third parties with respect to the information contained in this document. other precaution 1. this document may not be reprinted or reproduced, in whol e or in part, without prior written consent of rohm. 2. the products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of rohm. 3. in no event shall you use in any wa y whatsoever the products and the related technical information contained in the products or this document for any military purposes, incl uding but not limited to, the development of mass-destruction weapons. 4. the proper names of companies or products described in this document are trademarks or registered trademarks of rohm, its affiliated companies or third parties. downloaded from: http:///
datasheet datasheet notice C we rev.001 ? 2014 rohm co., ltd. all rights reserved. general precaution 1. before you use our pro ducts, you are requested to care fully read this document and fully understand its contents. rohm shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny rohms products against warning, caution or note contained in this document. 2. all information contained in this docume nt is current as of the issuing date and subj ec t to change without any prior notice. before purchasing or using rohms products, please confirm the la test information with a rohm sale s representative. 3. the information contained in this doc ument is provi ded on an as is basis and rohm does not warrant that all information contained in this document is accurate an d/or error-free. rohm shall not be in an y way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or concerning such information. downloaded from: http:///

▲Up To Search▲

Price & Availability of BU7481G

	To Download BU7481G Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .