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SGM321/sgm358/sgm324 1mhz, 60 a, rail-to-rail i/o cmos operational amplifiers product description the SGM321 (single), sgm358 (dual) and sgm324 (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 +85 temperature range. the SGM321/358/324 provide 1mhz bandwidth at a low current consumption of 60 a per amplifier. very low input bias currents of 10pa enable SGM321/358/324 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 this series of amplifiers include safety monitoring, portable equipment, battery and power supply control, and signal conditioning and interfacing for transducers in very low power systems. the SGM321 is available in the green sot-23-5 and sc70-5 packages. the sgm358 comes in the green soic-8, msop-8 and dip-8 packages. the sgm324 is offered in the 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 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: 1mhz ? very low input bias current: 10pa ? supply voltage range: 2.1v to 5.5v ? input voltage range: -0.1v to +5.6v with v s = 5.5v ? low supply current: 60 a/amplifier ? small packaging SGM321 available in sot-23-5 and sc70-5 sgm358 available in soic-8, msop-8 and dip-8 sgm324 available in soic-14 and tssop-14 pin configurations (top view) out a out b +inb +v s 1 2 3 4 5 6 7 8 -ina +ina -v s -inb sgm358 soic-8/msop-8/dip-8 1 2 3 4 5 out a -in a +in a -v s +v s -ind +ind sgm324 tssop-14/soic-14 6 7 8 9 10 11 12 13 14 -inb +in b -inc out b out c +inc out d +v s -in 1 2 3 4 5 -v s +in SGM321yn5 SGM321yc5 sot-23-5/sc70-5 out +v s -in 1 2 3 4 5 -v s +in sot-23-5 out SGM321byn5 dsp interface rev. d. 4 sg micro corp www.sg-micro.com
1mhz, 60 a, rail-to-rail i/o SGM321/sgm358/sgm324 cmos operational amplifiers 2 sg micro corp www.sg-micro.com package/ordering information model order number package description package option marking information SGM321yc5/tr sc70-5 tape and reel, 3000 321 SGM321yn5/tr sot-23-5 tape and reel, 3000 321 SGM321 SGM321byn5/tr sot-23-5 tape and reel, 3000 321b sgm358ys/tr soic-8 tape and reel, 2500 sgm358ys sgm358yms/tr msop-8 tape and reel, 3000 sgm358yms sgm358 sgm358yp dip-8 tube, 50 sgm358yp sgm324ys14/tr soic-14 tape and reel, 2500 sgm324ys14 sgm324 sgm324yts14/tr tssop-14 tape and reel, 3000 sgm324yts14 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 +85 package thermal resistance @ t a = +25 sc70-5, ja ................................................................ 333 /w 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. 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 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.
1mhz, 60 a, rail-to-rail i/o SGM321/sgm358/sgm324 cmos operational amplifiers 3 sg micro corp www.sg-micro.com electrical characteristics (at v s = +5v, r l = 100k ? connected to v s /2, and v out = v s /2, unless otherwise noted.) SGM321/358/324 typ min/max over temperature parameter symbol conditions +25 +25 -40 to +85 units min/max input characteristics input offset voltage v os v cm = v s /2 0.8 5 5.6 mv max input bias current i b 10 pa typ input offset current i os 10 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 70 62 62 common mode rejection ratio cmrr v s = 5.5v, v cm = -0.1v to 5.6v 68 56 55 db min r l = 5k ? , v o = +0.1v to +4.9v 80 70 70 open-loop voltage gain a ol r l = 100k ? , v o = +0.035v to +4.965v 84 80 80 db min input offset voltage drift v os / t 2.7 v/ typ output characteristics v oh r l = 100k ? 4.997 4.980 4.970 v min v ol r l = 100k ? 5 20 30 mv max v oh r l = 10k ? 4.992 4.970 4.960 v min output voltage swing from rail v ol r l = 10k ? 8 30 40 mv max i source 84 60 45 output current i sink r l = 10 ? to v s /2 75 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 82 60 58 db min quiescent current/amplifier i q 60 80 86 a max dynamic performance (c l = 100pf) gain-bandwidth product gbp 1 mhz typ slew rate sr g = +1, 2v output step 0.52 v/ s typ settling time to 0.1% t s g = +1, 2v output step 5.3 s typ overload recovery time v in gain = v s 2.6 s typ noise performance f = 1khz 27 nv/ hz typ voltage noise density e n f = 10khz 20 nv/ hz typ
1mhz, 60 a, rail-to-rail i/o SGM321/sgm358/sgm324 cmos operational amplifiers 4 sg micro corp www.sg-micro.com typical performance characteristics at t a = +25 , v s = +5v, and r l = 100k ? connected to v s /2, unless otherwise noted. small-signal step response 2 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 = -5 r fb = 100k ? maximum output voltage vs. frequency 0 1 2 3 4 5 6 1 10 100 1000 10000 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 large-signal step response 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 = 100k ? g = -1 r fb = 5k ? g = -1 r fb = 100k ? supply current vs. supply voltage 0 10 20 30 40 50 60 70 80 01234567 supply voltage (v) supply current ( a) 20mv/div 500mv/div g = +1 c l = 100pf r l = 100k ? g = +1 c l = 100pf r l = 100k ?
1mhz, 60 a, rail-to-rail i/o SGM321/sgm358/sgm324 cmos operational amplifiers 5 sg micro corp www.sg-micro.com typical performance characteristics at t a = +25 , v s = +5v, and r l = 100k ? connected to v s /2, unless otherwise noted. 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 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) - 55 135 - 55 135 v s = 3v sourcing current sinking current supply current vs. temperature 50 55 60 65 70 75 80 -50 -25 0 25 50 75 100 125 150 temperature ( ) supply current ( a) 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 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) sourcing current sinking current v s = 5v - 55 -55 25 25 135 135 open-loop gain vs. temperature 60 70 80 90 100 110 120 -50 -25 0 25 50 75 100 125 150 temperature ( ) open?loop gain (db) r l = 100k ? r l = 5k ?
1mhz, 60 a, rail-to-rail i/o SGM321/sgm358/sgm324 cmos operational amplifiers 6 sg micro corp www.sg-micro.com typical performance characteristics at t a = +25 , v s = +5v, and r l = 100k ? 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 overload recovery time time (2 s/div) power supply rejection ratio vs. temperature 60 70 80 90 100 110 120 -50 -25 0 25 50 75 100 125 150 temperature ( ) psrr (db) short-circuit current vs. supply voltage -20 0 20 40 60 80 100 120 01234567 supply voltage (v) short-circuit current (ma) v s = 5v g = -5 v in = 500mv 2.5v 0v 500mv 0v
1mhz, 60 a, rail-to-rail i/o SGM321/sgm358/sgm324 cmos operational amplifiers 7 sg micro corp www.sg-micro.com application notes driving capacitive loads the SGM321/sgm358/sgm324 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 osc illation. applicatio ns 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 SGM321 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 SGM321 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 SGM321/sgm358/sgm324 can operate 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. SGM321 vn vp +v s -v s (gnd) v out 10f 0.1f SGM321 +v s vn vp -v s v out 10f 0.1f 10f 0.1f figure 3. amplifier with bypass capacitors
1mhz, 60 a, rail-to-rail i/o SGM321/sgm358/sgm324 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 (r 4 / r 3 = r 2 / r 1 ), then v out = (vp - vn) r 2 / r 1 + v ref . vn vp v out SGM321 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 SGM321 v ref r 1 r 2 r 3 r 4 v out SGM321 SGM321 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-speed amplifiers. keep resistor values as low as possible and consistent with output loading consideration. v in v out SGM321 r 1 r 2 r 3 = r 1 // r 2 c figure 6. low pass active filter
1mhz, 60 a, rail-to-rail i/o SGM321/sgm358/sgm324 cmos operational amplifiers 9 sg micro corp www.sg-micro.com package outline dimensions sc70-5 e e1 e1 e d b a a2 a1 l c 0.20 l1 recommended land pattern (unit: mm) 1.9 0.65 1.3 0.75 0.4 dimensions in millimeters dimensions in inches symbol min max min max a 0.900 1.100 0.035 0.043 a1 0.000 0.100 0.000 0.004 a2 0.900 1.000 0.035 0.039 b 0.150 0.350 0.006 0.014 c 0.080 0.150 0.003 0.006 d 2.000 2.200 0.079 0.087 e 1.150 1.350 0.045 0.053 e1 2.150 2.450 0.085 0.096 e 0.65 typ 0.026 typ e1 1.300 bsc 0.051 bsc l 0.525 ref 0.021 ref l1 0.260 0.460 0.010 0.018 0 8 0 8
1mhz, 60 a, rail-to-rail i/o SGM321/sgm358/sgm324 cmos operational amplifiers 10 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
1mhz, 60 a, rail-to-rail i/o SGM321/sgm358/sgm324 cmos operational amplifiers 11 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
1mhz, 60 a, rail-to-rail i/o SGM321/sgm358/sgm324 cmos operational amplifiers 12 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
1mhz, 60 a, rail-to-rail i/o SGM321/sgm358/sgm324 cmos operational amplifiers 13 sg micro corp www.sg-micro.com package outline dimensions dip-8 e b1 b a a2 a1 l e d e1 e2 c dimensions in millimeters dimensions in inches symbol min max min max a 3.710 4.310 0.146 0.170 a1 0.510 0.020 a2 3.200 3.600 0.126 0.142 b 0.380 0.570 0.015 0.022 b1 1.524 bsc 0.060 bsc c 0.204 0.360 0.008 0.014 d 9.000 9.400 0.354 0.370 e 6.200 6.600 0.244 0.260 e1 7.320 7.920 0.288 0.312 e 2.540 bsc 0.100 bsc l 3.000 3.600 0.118 0.142 e2 8.400 9.000 0.331 0.354
1mhz, 60 a, rail-to-rail i/o SGM321/sgm358/sgm324 cmos operational amplifiers 14 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
1mhz, 60 a, rail-to-rail i/o SGM321/sgm358/sgm324 cmos operational amplifiers 15 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
1mhz, 60 a, rail-to-rail i/o SGM321/sgm358/sgm324 cmos operational amplifiers 16 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 sc70-5 7 9.5 2.25 2.55 1.20 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
1mhz, 60 a, rail-to-rail i/o SGM321/sgm358/sgm324 cmos operational amplifiers 17 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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