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sgm8521/2/4 150khz, 5.5 a, rail-to-rail i/o cmos operational amplifiers product description the sgm8521 (single), sgm8522 (dual) and sgm8524 (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 sgm8521/2/4 provide 150khz bandwidth at a low current consumption of 5.5 a per amplifier. very low input bias currents enable the sgm8521/2/4 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 sgm8521 single is available in green sot-23-5 and soic-8 packages. the sgm8522 dual comes in green soic-8 and msop-8 packages. the sgm8524 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 1mv typical v os ? unity gain stable ? gain-bandwidth product: 150khz ? supply voltage range: 2.1v to 5.5v ? input voltage range: -0.1v to +5.6v with v s = 5.5v ? low supply current: 5.5 a/amplifier ? small packaging sgm8521 available in soic-8 and sot-23-5 sgm8522 available in soic-8 and msop-8 sgm8524 available in soic-14 and tssop-14 pin configurations (top view) +v s -in 3 4 5 1 2 -v s +in sgm8521 sot-23-5 out 5 6 7 8 1 2 3 4 +v s sgm8521 soic-8 nc nc = no connect -in +in -v s nc nc out 10 11 12 13 14 1 2 3 4 5 outa -ina +ina -v s +v s -ind +ind soic-14/tssop-14 6 7 9 8 -inb +inb -inc outb outc +inc outd sgm8524 outa outb +inb +v s 5 6 7 8 1 2 3 4 -ina +ina -v s -inb sgm8522 soic-8/msop-8 rev. c. 2 sg micro corp www.sg-micro.com
150khz, 5.5 a, rail-to-rail i/o sgm8521/2/4 cmos operational amplifiers 2 sg micro corp www.sg-micro.com package/ordering information model order number package description package option marking information sgm8521xn5/tr sot-23-5 tape and reel, 3000 8521 sgm8521 sgm8521xs/tr soic-8 tape and reel, 2500 sgm8521xs sgm8522xs/tr soic-8 tape and reel, 2500 sgm8522xs sgm8522 sgm8522xms/tr msop-8 tape and reel, 3000 sgm8522xms sgm8524xs14/tr soic-14 tape and reel, 2500 sgm8524xs14 sgm8524 sgm8524xts14/tr tssop-14 tape and reel, 3000 sgm8524xts14 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 rang e............. .............-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 maxi mum 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. 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 parametr ic changes could cause the device not to meet its published specifications. sgmicro reserves the right to make any chang e in circuit design, specification or other related things if necessary without not ice at any time. please contact sgmicro sales office to get the latest datasheet.
150khz, 5.5 a, rail-to-rail i/o sgm8521/2/4 cmos operational amplifiers 3 sg micro corp www.sg-micro.com electrical characteristics (at t a = +25 , v s = +5v, r l = 500k ? connected to v s /2 and v out = v s /2, unless otherwise noted.) parameter symbol conditions min typ max units input offset voltage v os 1 3.5 mv quiescent current/amplifier i q 5.5 a v o = +0.015v to +4.985v, r l = 500k ? 90 110 open-loop voltage gain g v v o = +0.1v to +4.9v, r l = 100k ? 88 108 db v s = +5.5v, -0.1v < v cm < +5.6v 60 87 common mode rejection ratio cmrr v s = +5.5v, -0.1v < v cm < +4v 70 114 db power supply rejection ratio psrr v s = +2.5v to +5.5v, v cm = +0.5v 65 94 db i source 61 87 output current i sink r l = 10 ? to v s /2 60 76 ma v oh 4.990 4.997 output voltage swing v ol 0.005 0.010 v gain-bandwidth product gbp 150 khz slew rate sr r l = 100k ? 0.05 v/ s f = 1khz 85 voltage noise density e n f = 10khz 44 nv/ hz
150khz, 5.5 a, rail-to-rail i/o sgm8521/2/4 cmos operational amplifiers 4 sg micro corp www.sg-micro.com typical performance characteristics at t a = +25 , v s = +5v and r l = 500k ? connected to v s /2, unless otherwise noted. small signal step response time (50 s/div) output voltage (50mv/div) v s = 5v c l = 100pf r l = 100k ? cmrr and psrr vs. frequency 40 45 50 55 60 65 70 75 80 85 0.01 0.1 1 10 100 1000 frequency (khz) cmrr and psrr (db) cmrr psrr small-signal overshoot vs. load capacitance 0 10 20 30 40 50 60 70 10 100 1000 load capacitance (pf) small-signal overshoot (%) g = +1 r l = 500k ? g = -1 r fb = 560k ? large signal step response time (100 s/div) output voltage (500mv/div) v s = 5v c l = 100pf r l = 100k ? maximum output voltage vs. frequency 0 1 2 3 4 5 6 1 10 100 frequency (khz) output voltage (v p-p ) v s = 5v v s = 2.5v v s = 5.5v input voltage noise spectral density vs. frequency 0 20 40 60 80 100 120 0.1 1 10 100 frequency (khz) voltage noise (nv/ hz)
150khz, 5.5 a, rail-to-rail i/o sgm8521/2/4 cmos operational amplifiers 5 sg micro corp www.sg-micro.com typical performance characteristics at t a = +25 , v s = +5v, and r l = 500k ? connected to v s /2, unless otherwise noted. supply current vs. temperature 2 3 4 5 6 7 8 9 -50 -25 0 25 50 75 100 125 150 temperature ( ) supply current ( a) cmrr vs. temperature 50 60 70 80 90 100 110 -50 -25 0 25 50 75 100 125 150 temperature () cmrr (db) cmrr_l cmrr_h output voltage 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) v s = 5v sourcing current sinking current -55 -55 2 5 25 135 135 open-loop gain vs. temperature 80 90 100 110 120 130 140 -50 -25 0 25 50 75 100 125 150 temperature ( ) open?loop gain (db) r l = 100k ? r l = 500k ? psrr vs. temperature 20 40 60 80 100 120 140 -50 -25 0 25 50 75 100 125 150 temperature ( ) psrr (db) output voltage vs. output current 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0 102030405060 output current (ma) output voltage (v) v s = 3v sourcing current sinking current - 55 - 55 25 25 135 135
150khz, 5.5 a, rail-to-rail i/o sgm8521/2/4 cmos operational amplifiers 6 sg micro corp www.sg-micro.com typical performance characteristics at t a = +25 , v s = +5v, and r l = 500k ? connected to v s /2, unless otherwise noted. short-circuit current vs. supply voltage -20 0 20 40 60 80 100 120 01234567 supply voltage (v) short-circuit current (ma) supply current vs. supply voltage -1 0 1 2 3 4 5 6 7 01234567 supply voltage (v) supply current ( a)
150khz, 5.5 a, rail-to-rail i/o sgm8521/2/4 cmos operational amplifiers 7 sg micro corp www.sg-micro.com application notes driving capacitive loads the sgm8521/2/4 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. appl ications 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 gain accuracy because r iso forms a voltage divider with the r load . v in v out sgm8521 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 sgm8521 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 parasi tic capacitance associated with inverting node. power-supply bypassing and layout the sgm8521/2/4 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. sgm8521 +v s vn vp -v s v out sgm8521 vn vp +v s -v s (gnd) v out 10 f 0.1 f 10 f 0.1 f 10 f 0.1 f figure 3. amplifier with bypass capacitors
150khz, 5.5 a, rail-to-rail i/o sgm8521/2/4 cmos operational amplifiers 8 sg micro corp www.sg-micro.com typical application circuits differential amplifier the circuit shown in figure 4 perf orms the difference function. if the resistor ratios are equal to (r4/r3 = r2/r1), then v out = (vp - vn) r2/r1 + v ref . vn vp v out sgm8521 v ref r1 r2 r3 r4 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 sgm8521 v ref r1 r2 r3 r4 v out sgm8521 sgm8521 figure 5. instrumentation amplifier low pass active filter the low pass filter shown in figure 6 has a dc gain of (-r2/r1) 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-speed amplifiers. keep resistor values as low as possible and consistent with output loading consideration. v in v out sgm8521 r1 r2 r3 = r1 // r2 c figure 6. low pass active filter
150khz, 5.5 a, rail-to-rail i/o sgm8521/2/4 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
150khz, 5.5 a, rail-to-rail i/o sgm8521/2/4 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
150khz, 5.5 a, rail-to-rail i/o sgm8521/2/4 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
150khz, 5.5 a, rail-to-rail i/o sgm8521/2/4 cmos operational amplifiers 12 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
150khz, 5.5 a, rail-to-rail i/o sgm8521/2/4 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
150khz, 5.5 a, rail-to-rail i/o sgm8521/2/4 cmos operational amplifiers 14 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
150khz, 5.5 a, rail-to-rail i/o sgm8521/2/4 cmos operational amplifiers 15 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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