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sgm321 sgm358 SGM324 product description the sgm321(single), sgm358(dual) and SGM324(quad) are rail-to-rail input and output voltage feedback amplifiers offering low cost. they have a wide input common-mode voltage range and output voltage swing, and take the minimum operating supply voltage down to 2.1v and the maximum recommended supply voltage is 5.5 v. all are specified over the extended ? 40c to +85c temperature range. the sgm321/358/324 provide 1mhz bandwidth at a low current consumption of 60a 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 inputs and outputs are useful to designers buffering asic in single-supply systems. applications for the series amplifiers include safety monitor- ing, portable equipment, battery and power supply control, and signal conditioning and interfacing for transducers in very low power systems. the sgm321 is available in sot23-5 and sc70-5 packages. the sgm358 comes in so-8 msop-8 and pdip-8 packages. the SGM324 is offered in so-14, tssop-14, tssop-16 and so-16 packages. applications asic input or output amplifier sensor interface piezo electric transducer amplifier medical instrumentation mobile communication audio output portable systems smoke detectors notebook pc pcmcia cards battery ?powered equipment dsp interface 1mhz, 60a, rail-to-rail i/o cmos operational amplifier 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 currents: 10pa ? operates on 2.1 v to 5.5 v supplies ? input voltage range: - 0.1 v to +5.6 v with v s = 5.5 v ? low supply current: 60 a/amplifier ? small packaging sgm321 available in sot23-5 and sc70-5 sgm358 available in so-8, msop-8 and pdip-8 SGM324 available in so-14, so-16, tssop-14 and tssop-16 pin configurations (top view) +v s -in 1 2 3 4 5 -v s +in sgm321 sot23-5 / sc70-5 out out a out b +inb +v s 1 2 3 4 5 6 7 8 -ina +ina -v s -inb sgm358 so-8 / msop-8 / pdip-8 1 2 3 4 5 out a -in a +in a -v s +v s -ind +ind 6 7 89 10 11 12 13 14 15 16 -inb +inb -inc nc nc out b out c +inc out d nc = no connect tssop-16 / so-16 SGM324 1 2 3 4 5 out a -in a +in a -v s +v s -ind +ind SGM324 tssop-14/so-14 6 7 8 9 10 11 12 13 14 -inb +inb -inc out b out c +inc out d shengbang microelectronics co, ltd tel: 86/451/84348461 www.sg-micro.com rev. d
sgm321/358/324 electrical characteristics : v s = +5v (at r l = 100k connected to vs/2,and v out = vs/2, unless otherwise noted) sgm321/358/324 typ min/max over temperature parameter condition +25 +25 -40 to 85 unit s min / max input characteristics input offset voltage (v os ) input bias current (i b ) input offset current (i os ) common-mode voltage range (v cm ) common-mode rejection ratio(cmrr) open-loop voltage gain( a ol ) input offset voltage drift ( ? v os / ? t ) v s = 5.5v v s = 5.5v, v cm = - 0.1v to 4 v v s = 5.5v, v cm = - 0.1v to 5.6 v r l = 5k ? ,vo = 0.1v to 4.9v r l =100k ? ,vo = 0.035v to 4.965v 0.8 10 10 - 0.1 to + 5.6 70 68 80 84 2.7 5 62 56 70 80 5.6 62 55 70 80 mv pa pa v db db db db v/ max typ typ typ min min min min typ output characteristics output voltage swing from rail output current (i out ) r l = 100k ? r l = 10k ? 0.008 0.08 23 20 18.8 v v ma typ typ min power supply operating voltage range power supply rejection ratio (psrr) quiescent current / amplifier (i q ) v s = +2.5 v to + 5.5 v v cm = (-v s ) + 0.5 i out = 0 82 60 2.1 5.5 60 80 2.5 5.5 58 86 v v db a min max min max dynamic performance gain-bandwidth product (gbp) slew rate (sr) settling time to 0.1%( t s ) overload recovery time c l = 100pf g = +1 , 2v output step g = +1, 2 v output step v in gain = vs 1 0.52 5.3 2.6 mhz v/s s s typ typ typ typ noise performance voltage noise density (e n ) f = 1khz f = 10khz 27 20 nv/ hz nv/ hz typ typ specifications subject to change without notice.
sgm321/358/324 package/ordering information model order number package description package option marking information sgm321yc5/tr sc70-5 tape and reel, 3000 321 sgm321 sgm321yn5/tr sot23-5 tape and reel, 3000 321 sgm358ys/tr so-8 tape and reel, 2500 sgm358ys sgm358yms/tr msop-8 tape and reel, 3000 sgm358yms sgm358 sgm358yp pdip-8 tube, 50 sgm358yp SGM324ys/tr so-16 tape and reel, 2500 SGM324ys SGM324yts/tr tssop-16 tape and reel, 3000 SGM324yts SGM324ys14/tr so-14 tape and reel, 2500 SGM324ys14 SGM324 SGM324yts14/tr tssop-14 tape and reel, 3000 SGM324yts14 absolute maximum ratings supply voltage, v+ to v- . . . . . . . . . . . . . . . . . . . . . 7.5 v common-mode input voltage . . . . . . . . . . . . . . . . . . . . (?v s ) ? 0.5 v to (+v s )+0.5v storage temperature range . . . . . . . . .?6 5 to +150 junction temperature . . . . . . . . . . . . . . . .. . . . . . . .160 operating temperature range . . . . . . . ?45 to +85 package thermal resistance @ t a = 25 sc70-5, ja ............................ ................. ................... 333 /w sot23-5, ja ........................ ...... ................................ 190 /w so-8, ja .................. ........... ..... ....................................125 /w msop-8, ja .............. ..... ........................................... 216 /w so-16, ja ................... ....... ........................................... 82 /w tssop-16, ja ................ ...... ...................................... 105 /w lead temperature range (soldering 10 sec) ..................................................... 260 esd susceptibility hbm............................................ ..... ............. ............ ......4000v mm............................... ................. ....................................400v notes 1. stresses above those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. caution this integrated circuit can be damaged by esd. shengbang micro-electronics 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 parametric changes could cause the device not to meet its published specifications.
sgm321/358/324 typical performance characteristics at t a = +25 , v s = +5v, and r l = 100k connected to vs/2,unless otherwise noted. small-signal step response large-signal step response 2s/div 10s/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 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 maximum output voltage vs.frequency 0 1 2 3 4 5 6 1 10 100 1000 10000 frequency(khz) output voltage(vp-p) maximum output voltage without slew-rate induced distortion v s = 5.5v v s = 5v v s = 2.5v quiescent and short-circuit current vs.supply voltage 25 30 35 40 45 50 2 2.5 3 3.5 4 4.5 5 5.5 supply voltage(v) quiescent current( a) i sc i q 5 15 20 10 25 30 short-circuit current(ma) 20mv/div 500mv/div g = +1 c l = 100pf r l = 100k ? g = +1 c l = 1 0 0 p f r l = 1 0 0 k ?
sgm321/358/324 typical performance characteristics at t a = +25 , v s = +5v, and r l = 100k connected to vs/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 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 1 2 3 048121620 output current(ma) output voltage(v) 25 135 -50 25 135 -50 v s = 3v sourcing current sinking current output voltage swing vs.output current 0 1 2 3 4 5 0 5 10 15 20 25 30 output current(ma) output voltage(v) 25 135 -50 25 135 -50 v s = 5v sourcing current sinking current supply current vs.temperature 30 35 40 45 50 55 60 -50 -30 -10 10 30 50 70 90 110 130 temperature() supply current( a) v s = 2.5v v s = 5v v s = 3v open-loop gain vs.temperature 60 70 80 90 100 110 120 -50 -30 -10 10 30 50 70 90 110 130 temperature() openCloop gain(db) r l = 5k r l = 100k
sgm321/358/324 typical performance characteristics at t a = +25 , v s = +5v, and r l = 100k connected to vs/2,unless otherwise noted. common-mode rejection ratio vs.temperature 60 70 80 90 100 110 120 -50 -30 -10 10 30 50 70 90 110 130 temperature() cmrr(db) -vs < v cm <(+vs) -vs < v cm < (+vs)-1.5v power-supply rejection ratio vs.temperature 60 70 80 90 100 110 120 -50 -30 -10 10 30 50 70 90 110 130 temperature() psrr(db) overload recovery time time(2s/div) vs = 5v g = -5 v in = 500mv 2.5v 0v 500mv 0v
sgm321/358/324 application notes driving capacitive loads the sgm3xx can directly drive 250pf in unity-gain without oscillation. the unity-gain follower (buffer) is the most sensitive configuration to capacitive load ing. direct capacitive loading reduces the phase margin of amplif iers and this results in ringing or even oscillation. applications that require greater capacitive drive 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 improvement circuit is show n 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 he avy capacitive load with dc accuracy for no-buffer configuration, there are two others 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 sgm3xx family operates from either a single +2.5v to +5.5v supply or dual 1.25v to 2.75v supplies. for single-supply operation, bypass the power supply v dd with a 0.1 f ceramic capacitor which should be placed close to the v dd pin. for dual-supply operation, both the v dd and the v ss supplies should be bypassed to ground with separate 0.1 f ceramic capacitors. 2.2 f tantalum capacitor can be added for better performance. sgm321 v dd vn vp v ss v out 10 f 0.1 f 10 f 0.1 f sgm321 vn vp v dd v ss (gnd) v out 10 f 0.1 f figure 3. amplifier with bypass capacitors
sgm321/358/324 typical application circuits differential amplifier the circuit shown in figure 4 performs the difference function. if the resistors ratios are equal ( r4 / r3 = r2 / r1 ), then v out = ( vp ? vn ) r 2 / r 1 + vref. vn vp v out sgm321 vref 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 the high input impedance. vn vp sgm321 vref r1 r2 r3 r4 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 is within the bandwidth of the amplifie r. 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 resistors value as low as possible and consistent with output loading consideration. v in v out sgm321 r1 r2 r3 = r1 // r2 c figure 6. low pass active filter
sgm321/358/324 package outline dimensions sc70-5 e1 d e1 e b a2 a a1 e l l1 0.20 c 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 0.650typ 0.026typ e1 1.200 1.400 0.047 0.055 l 0.525ref 0.021ref l1 0.260 0.460 0.010 0.018 0 8 0 8
sgm321/358/324 package outline dimensions sot23-5 d e1 b a2 a a1 e l l c e1 0 0.20 e 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 0.400 0.012 0.016 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 0.950typ 0.037typ e1 1.800 2.000 0.071 0.079 l 0.700ref 0.028ref l1 0.300 0.600 0.012 0.024 0 8 0 8
sgm321/358/324 package outline dimensions so-8 c l d e e e1 a2 b a a1 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 0.190 0.250 0.007 0.010 d 4.780 5.000 0.188 0.197 e 3.800 4.000 0.150 0.157 e1 5.800 6.300 0.228 0.248 e 1.270typ 0.050typ l 0.400 1.270 0.016 0.050 0 8 0 8
sgm321/358/324 package outline dimensions msop-8 c l d e e1 a1 e b a2 a dimensions in millimeters dimensions in inches symbol min max min max a 0.800 1.200 0.031 0.047 a1 0.000 0.200 0.000 0.008 a2 0.760 0.970 0.030 0.038 b 0.30 typ 0.012 typ c 0.15 typ 0.006 typ d 2.900 3.100 0.114 0.122 e 0.65 typ 0.026 typ e 2.900 3.100 0.114 0.122 e1 4.700 5.100 0.185 0.201 l 0.410 0.650 0.016 0.026 0 6 0 6
sgm321/358/324 package outline dimensions pdip-8 d e a l a2 a1 e b1 b e1 c e2 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
sgm321/358/324 package outline dimensions so-14 0.25 d e1 e b a3 a l2 l m e index 0.80.1 dep0.20.1 2.00.1 btm e-mark dep0.10.05 a1 a2 3 4 0.10 b b1 c c1 with plating base metal section b-b 2 1 r1 r l1 h bb h dimensions in millimeters symbol min nom max a 1.35 1.60 1.75 a1 0.10 0.15 0.25 a2 1.25 1.45 1.65 a3 0.55 0.65 0.75 b 0.36 0.49 b1 0.35 0.40 0.45 c 0.16 0.25 c1 0.15 0.20 0.25 d 8.53 8.63 8.73 e 5.80 6.00 6.20 e1 3.80 3.90 4.00 e 1.27 bsc l 0.45 0.60 0.80 l1 1.04 ref l2 0.25 bsc r 0.07 r1 0.07 h 0.30 0.40 0.50 0 8 1 6 8 10 2 6 8 10 3 5 7 9 4 5 7 9
sgm321/358/324 package outline dimensions so-16 c l d e e e1 b a a1 a2 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 0.007 0.010 d 9.800 10.20 0.386 0.402 e 3.800 4.000 0.150 0.157 e1 5.800 6.200 0.228 0.244 e 1.270 (bsc) 0.050 (bsc) l 0.400 1.270 0.016 0.050 0 8 0 8
sgm321/358/324 package outline dimensions tssop-14 d e1 e a3 e index 1 .00.05 0.1 dep 0.10 +0 -0.1 #1 pin a2 a a1 2 3 1 r1 r s b b l2 l l1 b b1 c c1 base metal section b-b dimensions in millimeters symbol min nom max a 1.20 a1 0.05 0.15 a2 0.90 1.00 1.05 a3 0.34 0.44 0.54 b 0.20 0.28 b1 0.20 0.22 0.24 c 0.10 0.19 c1 0.10 0.13 0.15 d 4.86 4.96 5.06 e 6.20 6.40 6.60 e1 4.30 4.40 4.50 e 0.65 bsc l 0.45 0.60 0.75 l1 1.00 ref l2 0.25 bsc r 0.09 r1 0.09 s 0.20 1 0 8 2 10 12 14 3 10 12 14
sgm321/358/324 package outline dimensions tssop-16 d e e1 e b a2 a pin #1 ident. a a1 l h c a dimensions in millimeters dimensions in inches symbol min max min max d 4.900 5.100 0.193 0.201 e 4.300 4.500 0.169 0.177 b 0.190 0.300 0.007 0.012 c 0.090 0.200 0.004 0.008 e1 6.250 6.550 0.246 0.258 a 1.100 0.043 a2 0.800 1.000 0.031 0.039 a1 0.020 0.150 0.001 0.006 e 0.65 (bsc) 0.026 (bsc) l 0.500 0.700 0.020 0.028 h 0.25(typ) 0.01(typ) 1 7 1 7
sgm321/358/324 revision history location page 11/06? data sheet changed from rev.a to rev.b changes to absolute maximum atings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 04/07? data sheet changed from rev.b to rev.c adds output voltage swing from rail test condition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 06/07? data sheet changed from rev.c to rev. d adds so-14 and tssop-14 packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1, 3, 14, 16 shengbang microelectronics co, ltd unit 3, chuangye plaza no.5, taihu northern street, yingbin road centralized industrial park harbin development zone harbin, heilongjiang 150078 p.r. china tel.: 86-451-84348461 fax: 86-451-84308461 www.sg-micro.com

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