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SGM8531/2/4 500khz, 18 a, rail-to-rail i/o cmos operational amplifiers product description the SGM8531 (single), sgm8532 (dual) and sgm8534 (quad) are low cost, rail-to-rail input and output voltage feedback amplifiers. they have a wide input common mode voltage range and output voltage swing, and take the minimum operating supply voltage down to 2.1v. the maximum recommended supply voltage is 5.5v. all are specified over the extended -40 to +125 temperature range. the SGM8531/2/4 provide 500khz bandwidth at a low current consumption of 18 a per amplifier. very low input bias currents of 0.5pa enable the SGM8531/2/4 to be used for integrators, photodiode amplifiers, and piezoelectric sensors. rail-to-rail input and output are useful to designers for buffering asic in single-supply systems. applications for these amplifie rs include safety monitoring, portable equipment, battery and power supply control, and signal conditioning and interfacing for transducers in very low power systems. the SGM8531 single is available in the green sot-23-5 and soic-8 packages. the sgm8532 dual comes in green soic-8 and msop-8 packages. the sgm8534 quad is offered in green soic-14 and tssop-14 packages. applications asic input or output amplifier sensor interface piezoelectric transducer amplifier medical instrumentation mobile communication audio output portable systems smoke detectors mobile telephone notebook pc pcmcia cards battery-powered equipment features ? low cost ? rail-to-rail input and output 0.8mv typical v os ? unity gain stable ? gain-bandwidth product: 500khz ? very low input bias current: 0.5pa ? supply voltage range: 2.1v to 5.5v ? input voltage range: -0.1v to +5.6v with v s = 5.5v ? low supply current: 18 a/amplifier ? small packaging SGM8531 available in soic-8 and sot-23-5 sgm8532 available in soic-8 and msop-8 sgm8534 available in soic-14 and tssop-14 pin configurations (top view) +v s -in 1 2 3 4 5 -v s +in SGM8531 sot-23-5 out 1 2 3 4 5 6 7 8 +v s SGM8531 soic-8 nc nc = no connect -in +in -v s nc nc out outa outb +inb +v s 1 2 3 4 5 6 7 8 -ina +ina -v s -inb sgm8532 soic-8/msop-8 9 10 8 11 12 13 14 1 2 3 4 5 6 7 sgm8534 soic-14/tssop-14 outa -ina +ina +v s -inb +inb outb -v s -ind +ind -inc outc +inc outd rev. c. 4 sg micro corp www.sg-micro.com
500khz, 18 a, rail-to-rail i/o SGM8531/2/4 cmos operational amplifiers 2 sg micro corp www.sg-micro.com package/ordering information model order number package description package option marking information SGM8531xn5/tr sot-23-5 tape and reel, 3000 8531 SGM8531 SGM8531xs/tr soic-8 tape and reel, 2500 SGM8531xs sgm8532xs/tr soic-8 tape and reel, 2500 sgm8532xs sgm8532 sgm8532xms/tr msop-8 tape and reel, 3000 sgm8532xms sgm8534xs14/tr soic-14 tape and reel, 2500 sgm8534xs14 sgm8534 sgm8534xts14/tr tssop-14 tape and reel, 3000 sgm8534xts14 absolute maximum ratings supply voltage, +v s to -v s .....................................................6v common mode input voltage.......... (-v s ) - 0.3v to (+v s ) + 0.3v storage temperature range............................. -65 to +150 junction temperature ........................................................150 operating temperature range ......................... -40 to +125 package thermal resistance @ t a = +25 sot-23-5, ja ................................................................ 190 /w soic-8, ja ....................................................................125 /w msop-8, ja ................................................................. 216 /w lead temperature (soldering 10sec)?????.?..........260 esd susceptibility hbm??????.................. ....................... ...................4000v mm???????.............................................................400v note: stresses beyond those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute ma ximum rating conditions for extended periods may affect device rel iability. caution this integrated circuit can be damaged by esd if you don?t pay attention to esd protection. sgmicro recommends that all integrated circuits be handled with appropriate precautions. failu re 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 parametr ic changes could cause the device not to meet its published specifications. sgmicro reserves the right to make any change in circuit design, specificati on or other related things if necessary without not ice at any time. please contact sgmicro sales office to get the latest datasheet.
500khz, 18 a, rail-to-rail i/o SGM8531/2/4 cmos operational amplifiers 3 sg micro corp www.sg-micro.com electrical characteristics (at v s = +5v, r l = 200k ? connected to v s /2 and v out = v s /2, unless otherwise noted.) SGM8531/2/4 typ min/max over temperature parameter symbol conditions +25 +25 -40 to +125 units min/max input characteristics input offset voltage v os v cm = v s /2 0.8 3.5 5.4 mv max input bias current i b 0.5 pa typ input offset current i os 0.5 pa typ input common mode voltage range v cm v s = 5.5v -0.1 to +5.6 v typ v s = 5.5v, v cm = -0.1v to +4v 88 71 68 common mode rejection ratio cmrr v s = 5.5v, v cm = -0.1v to +5.6v 75 60 57 db min r l = 5k ? , v o = +0.1v to +4.9v 104 86 81 open-loop voltage gain a ol r l = 100k ? , v o = +0.035v to +4.965v 110 90 86 db min input offset voltage drift v os / t 1.7 v/ typ output characteristics v oh r l = 100k ? 4.997 4.980 4.970 v min v ol r l = 100k ? 3 20 30 mv max v oh r l = 10k ? 4.994 4.970 4.960 v min output voltage swing v ol r l = 10k ? 6 30 40 mv max i source 85 60 45 output current i sink r l = 10 ? to v s /2 76 60 45 ma min power supply 2.1 2.5 v min operating voltage range 5.5 5.5 v max power supply rejection ratio psrr v s = +2.5v to +5.5v, v cm = +0.5v 85 70 66 db min quiescent current/amplifier i q 18 33 39 a max dynamic performance (c l = 100pf) gain-bandwidth product gbp 500 khz typ slew rate sr g = +1, 2v output step 0.2 v/ s typ settling time to 0.1% t s g = +1, 2v output step 18 s typ overload recovery time v in gain = v s 16 s typ noise performance f = 1khz 33 nv/ hz typ voltage noise density e n f = 10khz 20 nv/ hz typ
500khz, 18 a, rail-to-rail i/o SGM8531/2/4 cmos operational amplifiers 4 sg micro corp www.sg-micro.com typical performance characteristics at t a = +25 , v s = +5v and r l = 200k ? connected to v s /2, unless otherwise noted. small signal step response small signal step response 10 s/div 10 s/div small-signal overshoot vs. load capacitance 0 10 20 30 40 50 60 10 100 1000 10000 load capacitance (pf) small-signal overshoot (%) g = +1 r l = 200k ? g = -1 r fb = 5k ? g = -1 r fb = 100k ? small-signal overshoot vs. load capacitance 0 10 20 30 40 50 60 10 100 1000 10000 load capacitance (pf) small-signal overshoot (%) g = -5 r fb = 100k ? maximum output voltage vs. frequency 0 1 2 3 4 5 6 1 10 100 1000 frequency (khz) output voltage (v p-p ) maximum output voltage without slew-rate induced distortion v s = 5.5v v s = 5v v s = 2.5v g = +1 c l = 100pf r l = 5k ? g = +1 c l = 100pf r l = 200k ? g = +1 c l = 100pf r l = 200k ? 20mv/div 50mv/div 500mv/div large signal step response 20 s/div
500khz, 18 a, rail-to-rail i/o SGM8531/2/4 cmos operational amplifiers 5 sg micro corp www.sg-micro.com typical performance characteristics at t a = +25 , v s = +5v and r l = 200k ? connected to v s /2, unless otherwise noted. short-circuit current vs. supply voltage -20 0 20 40 60 80 100 120 0123456 supply voltage (v) short-circuit current (ma) input voltage noise spectral density vs. frequency 10 100 1000 0.01 0.1 1 10 100 frequency (khz) voltage noise (nv/ hz) output voltage swing vs. output current 0 0.5 1 1.5 2 2.5 3 3.5 0 102030405060 output current (ma) output voltage (v) 25 135 -55 25 1 35 ) supply current ( a) cmrr and psrr vs. frequency 0 10 20 30 40 50 60 70 80 90 100 0.01 0.1 1 10 100 1000 10000 frequency (khz) cmrr,psrr (db) cmrr psrr output voltage swing vs. output current 0 1 2 3 4 5 6 0 20 40 60 80 100 120 140 160 output current (ma) output voltage (v) 25 135 -55 2 5 135 - 55 v s = 5v sourcing current sinking current
500khz, 18 a, rail-to-rail i/o SGM8531/2/4 cmos operational amplifiers 6 sg micro corp www.sg-micro.com typical performance characteristics at t a = +25 , v s = +5v and r l = 200k ? connected to v s /2, unless otherwise noted. common mode rejection ratio vs. temperature 60 70 80 90 100 110 120 -50 -25 0 25 50 75 100 125 150 temperature ( ) cmrr (db) -v s < v cm < (+v s ) -v s < v cm < (+v s ) - 1.5v r l = 100k ? power supply rejection ratio vs. temperature 80 90 100 110 120 130 140 -50 -25 0 25 50 75 100 125 150 temperature ( ) psrr (db) r l = 100k ? open-loop voltage gain vs. temperature 80 90 100 110 120 130 140 -50 -25 0 25 50 75 100 125 150 temperature ( ) open?loop voltage gain (db) r l = 5k ? r l = 100k ? offset voltage production distribution 0 4 8 12 16 20 24 28 32 36 40 -3 -2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 2.5 3 offset voltage (mv) percentage of amplifiers (%) typical production distribution of packaged units. supply current vs. supply voltage 0 5 10 15 20 25 30 0123456 supply voltage (v) supply current ( a) 2.5 v 0 v 250m v 0 v vs = 5v g = -10 v in = 250mv time (20 s/div) overload recovery time
500khz, 18 a, rail-to-rail i/o SGM8531/2/4 cmos operational amplifiers 7 sg micro corp www.sg-micro.com application notes driving capacitive loads the SGM8531/2/4 can directly drive 250pf in unity-gain without oscillation. the unity-gain follower (buffer) is the most sensitive configuration to capacitive loading. direct capacitive loading reduces the phase margin of amplifiers and this results in ringing or even oscillation. applications that require greater capacitive driving capability should use an isolation resistor between the output and the capacitive load like the circuit in figure 1. the isolation resistor r iso and the load capacitor c l form a zero to increase stability. the bigger the r iso resistor value, the more stable v out will be. note that this method results in a loss of ga in accuracy because r iso forms a voltage divider with the r load . v in v out SGM8531 c l r iso figure 1. indirectly driving heavy capacitive load an improved circuit is shown in figure 2. it provides dc accuracy as well as ac stability. r f provides the dc accuracy by connecting the inverting signal with the output. c f and r iso serve to counteract the loss of phase margin by feeding the high frequency component of the output signal back to the amplifier?s inverting input, thereby preserving phase margin in the overall feedback loop. v in v out SGM8531 c l r iso r l r f c f figure 2. indirectly driving heavy capacitive load with dc accuracy for non-buffer configuration, there are two other ways to increase the phase margin: (a) by increasing the amplifier?s gain or (b) by placing a capacitor in parallel with the feedback resistor to counteract the parasitic capacitance associated with inverting node. power-supply bypassing and layout the SGM8531/2/4 family operates from either a single +2.1v to +5.5v supply or dual 1.05v to 2.75v supplies. for single-supply operation, bypass the power supply +v s with a 0.1f ceramic capacitor which should be placed close to the +v s pin. for dual-supply operation, both the +v s and the -v s supplies should be bypassed to ground with separate 0.1f ceramic capacitors. 2.2f tantalum capacitor can be added for better performance. SGM8531 +v s vn vp -v s v out 10f 0.1f 10f 0.1f SGM8531 vn vp +v s -v s (gnd) v out 10f 0.1f figure 3. amplifier with bypass capacitors
500khz, 18 a, rail-to-rail i/o SGM8531/2/4 cmos operational amplifiers 8 sg micro corp www.sg-micro.com typical application circuits differential amplifier the circuit shown in figure 4 perfo rms the difference function. if the resistor ratios are equal to (r 4 / r 3 = r 2 / r 1 ), then v out = (vp - vn) r 2 / r 1 + v ref . vn vp v out SGM8531 v ref r 1 r 2 r 3 r 4 figure 4. differential amplifier instrumentation amplifier the circuit in figure 5 performs the same function as that in figure 4 but with a high input impedance. vn vp SGM8531 v ref r 1 r 2 r 3 r 4 v out SGM8531 SGM8531 figure 5. instrumentation amplifier low pass active filter the low pass filter shown in figure 6 has a dc gain of (-r 2 / r 1 ) and the -3db corner frequency is 1/2 ? r 2 c. make sure the filter bandwidth is within the bandwidth of the amplifier. the large values of feedback resistors can couple with parasitic capacitance and cause undesired effects such as ringing or oscillation in high-spee d amplifiers. keep resistor values as low as possible and consistent with output loading consideration. v in v out SGM8531 r 1 r 2 r 3 = r 1 // r 2 c figure 6. low pass active filter
500khz, 18 a, rail-to-rail i/o SGM8531/2/4 cmos operational amplifiers 9 sg micro corp www.sg-micro.com package outline dimensions sot-23-5 e e1 e e1 b d a1 a2 a c l 0.2 recommended land pattern (unit: mm) 1.90 2.59 0.99 0.69 0.95 dimensions in millimeters dimensions in inches symbol min max min max a 1.050 1.250 0.041 0.049 a1 0.000 0.100 0.000 0.004 a2 1.050 1.150 0.041 0.045 b 0.300 0.500 0.012 0.020 c 0.100 0.200 0.004 0.008 d 2.820 3.020 0.111 0.119 e 1.500 1.700 0.059 0.067 e1 2.650 2.950 0.104 0.116 e 0.950 bsc 0.037 bsc e1 1.900 bsc 0.075 bsc l 0.300 0.600 0.012 0.024 0 8 0 8
500khz, 18 a, rail-to-rail i/o SGM8531/2/4 cmos operational amplifiers 10 sg micro corp www.sg-micro.com package outline dimensions soic-8 d e e1 e b a a2 a1 c l 1.27 0.6 2.2 5.2 recommended land pattern (unit: mm) dimensions in millimeters dimensions in inches symbol min max min max a 1.350 1.750 0.053 0.069 a1 0.100 0.250 0.004 0.010 a2 1.350 1.550 0.053 0.061 b 0.330 0.510 0.013 0.020 c 0.170 0.250 0.006 0.010 d 4.700 5.100 0.185 0.200 e 3.800 4.000 0.150 0.157 e1 5.800 6.200 0.228 0.244 e 1.27 bsc 0.050 bsc l 0.400 1.270 0.016 0.050 0 8 0 8
500khz, 18 a, rail-to-rail i/o SGM8531/2/4 cmos operational amplifiers 11 sg micro corp www.sg-micro.com package outline dimensions msop-8 e1 e e d a1 l c a a2 b recommended land pattern (unit: mm) 1.02 0.41 0.65 4.8 dimensions in millimeters dimensions in inches symbol min max min max a 0.820 1.100 0.032 0.043 a1 0.020 0.150 0.001 0.006 a2 0.750 0.950 0.030 0.037 b 0.250 0.380 0.010 0.015 c 0.090 0.230 0.004 0.009 d 2.900 3.100 0.114 0.122 e 2.900 3.100 0.114 0.122 e1 4.750 5.050 0.187 0.199 e 0.650 bsc 0.026 bsc l 0.400 0.800 0.016 0.031 0 6 0 6
500khz, 18 a, rail-to-rail i/o SGM8531/2/4 cmos operational amplifiers 13 sg micro corp www.sg-micro.com package outline dimensions tssop-14 e e1 d b a a1 a2 l c h e recommended land pattern (unit: mm) 5.94 0.42 1.78 0.65 dimensions in millimeters dimensions in inches symbol min max min max a 1.100 0.043 a1 0.050 0.150 0.002 0.006 a2 0.800 1.000 0.031 0.039 b 0.190 0.300 0.007 0.012 c 0.090 0.200 0.004 0.008 d 4.900 5.100 0.193 0.201 e 4.300 4.500 0.169 0.177 e1 6.250 6.550 0.246 0.258 e 0.650 bsc 0.026 bsc l 0.500 0.700 0.02 0.028 h 0.25 typ 0.01 typ 1 7 1 7
500khz, 18 a, rail-to-rail i/o SGM8531/2/4 cmos operational amplifiers 13 sg micro corp www.sg-micro.com package outline dimensions soic-14 dimensions in millimeters dimensions in inches symbol min mod max min mod max a 1.35 1.75 0.053 0.069 a1 0.10 0.25 0.004 0.010 a2 1.25 1.65 0.049 0.065 a3 0.55 0.75 0.022 0.030 b 0.36 0.49 0.014 0.019 d 8.53 8.73 0.336 0.344 e 5.80 6.20 0.228 0.244 e1 3.80 4.00 0.150 0.157 e 1.27 bsc 0.050 bsc l 0.45 0.80 0.018 0.032 l1 1.04 ref 0.040 ref l2 0.25 bsc 0.01 bsc r 0.07 0.003 r1 0.07 0.003 h 0.30 0.50 0.012 0.020 0 8 0 8 recommended land pattern (unit: mm) d e1 e l1 l2 a 3 a a 2 5.2 1.27 0.6 2.2 e b a 1 index 0.80.1 dep 0.20.1 2.00.1 btm e-mark dep 0.10.05 l h h r r1
500khz, 18 a, rail-to-rail i/o SGM8531/2/4 cmos operational amplifiers 13 sg micro corp www.sg-micro.com tape and reel information note: the picture is only for reference. please make the object as the standard. key parameter list of tape and reel package type reel diameter reel width w1 (mm) a0 (mm) b0 (mm) k0 (mm) p0 (mm) p1 (mm) p2 (mm) w (mm) pin1 quadrant sot-23-5 7?? 9.5 3.17 3.23 1.37 4.0 4.0 2.0 8.0 q3 soic-8 13 12.4 6.4 5.4 2.1 4.0 8.0 2.0 12.0 q1 msop-8 13 12.4 5.2 3.3 1.5 4.0 8.0 2.0 12.0 q1 soic-14 13 16.4 6.6 9.3 2.1 4.0 8.0 2.0 16.0 q1 tssop-14 13 12.4 6.95 5.6 1.2 4.0 8.0 2.0 12.0 q1 reel width (w1) reel diameter reel dimensions tape dimensions direction of feed p2 p0 w p1 a0 k0 b0 q1 q2 q4 q3 q3 q4 q2 q1 q3 q4 q2 q1
500khz, 18 a, rail-to-rail i/o SGM8531/2/4 cmos operational amplifiers 13 sg micro corp www.sg-micro.com carton box dimensions note: the picture is only for reference. please make the object as the standard. key parameter list of carton box reel type length (mm) width (mm) height (mm) pizza/carton 7? (option) 368 227 224 8 7? 442 410 224 18 13? 386 280 370 5

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