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january 2012 doc id 2471 rev 14 1/24 24 lm2904, lm2904a low-power dual operational amplifier features internally frequency-compensated large dc voltage gain: 100 db wide bandwidth (unity gain): 1.1 mhz (temperature compensated) very low supply current/ amplifier, essentially independent of supply voltage low input bias current: 20 na (temperature compensated) low input offset current: 2 na input common-mode voltage range includes negative rail differential input voltag e range equal to the power supply voltage large output voltage swing 0 v to (v cc+ -1.5 v) description this circuit consists of two independent, high gain, internally frequency-compensated operational amplifiers de signed specifically for automotive and industrial control systems. it operates from a single power supply over a wide range of voltages. the low power supply drain is independent of the magnitude of the power supply voltage. application areas include transducer amplifiers, dc gain blocks and all the conventional op-amp circuits which can now be more easily implemented in single power supply systems. for example, these circuits can be directly supplied from the standard +5 v which is used in logic systems and easily provides the required interface electronics without requiring any additional power supply. in the linear mode, the input common-mode voltage range includes ground and the output voltage can also swing to ground, even though operated from a single power supply. n dip8 (plastic package) d so-8 (plastic micropackage) p tssop8 (thin shrink small outline package) s miniso-8 pin connections (top view) q2 dfn8 2 x 2 mm (plastic micropackage) www.st.com
contents lm2904, lm2904a 2/24 doc id 2471 rev 14 contents 1 schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 absolute maximum ratings and operating conditions . . . . . . . . . . . . . 4 3 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.1 typical single-supply applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4 macromodel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5.1 dip8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5.2 so-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 5.3 dfn8 2 x 2 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 5.4 tssop8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 5.5 miniso-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 6 ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 7 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
lm2904, lm2904a schematic diagram doc id 2471 rev 14 3/24 1 schematic diagram figure 1. schematic diagram (1/2 lm2904) 6 m a 4 m a 100 m a q2 q 3 q4 q1 inverting inp u t non-inverting inp u t q 8 q 9 q10 q11 q12 50 ma q1 3 o u tp u t q7 q6 q5 r s c v cc c c gnd
absolute maximum ratings and operating conditions lm2904, lm2904a 4/24 doc id 2471 rev 14 2 absolute maximum ratings and operating conditions table 1. absolute maximum ratings symbol parameter value unit v cc supply voltage (1) 16 or 32 v v id differential input voltage (2) 32 v v in input voltage -0.3 to 32 v output short-circuit duration (3) infinite s i in input current (4) : v in driven negative input current (5) : v in driven positive above amr value 5 ma in dc or 50 ma in ac (duty cycle = 10%, t = 1s) 0.4 ma t oper operating free-air temperature range -40 to +125 c t stg storage temperature range -65 to +150 c t j maximum junction temperature 150 c r thja thermal resistance junction to ambient (6) so-8 tssop8 dip8 miniso-8 dfn8 2x2 125 120 85 190 57 c/w r thjc thermal resistance junction to case (6) so-8 tssop8 dip8 miniso-8 40 37 41 39 c/w esd hbm: human body model (7) 300 v mm: machine model (8) 200 v cdm: charged device model (9) 1.5 kv 1. all voltage values, except differential voltage are with respect to net work ground terminal. 2. differential voltages are the non-inverting input term inal with respect to the inverting input terminal. 3. short-circuits from the output to v cc can cause excessive heating if v cc+ > 15 v. the maximum output current is approximately 40 ma, independent of the magnitude of v cc . destructive dissipation can result from simu ltaneous short-circuits on all amplifiers. 4. this input current only exists when the voltage at any of t he input leads is driven negative. it is due to the collector-base junction of the input pnp transistor becom ing forward-biased and thereby acting as input diode clamp. in addition to this diode action, there is npn parasit ic action on the ic chip. this transistor acti on can cause the output voltages of the op- amps to go to the v cc voltage level (or to ground for a large overdrive) fo r the time during which an input is driven negative. this is not destructive and normal output is restored for input voltages above -0.3 v. 5. the junction base/substrate of the input pn p transistor polarized in reverse must be pr otected by a resistor in series with the inputs to limit the input current to 400 a max (r = (vin-32 v)/400 a). 6. short-circuits can c ause excessive heating and destructive dissipation. values are typical. 7. human body model: a 100 pf capacitor is charged to the specified voltage, then discharged through a 1.5 k resistor between two pins of the device. this is do ne for all couples of connected pin combinat ions while the other pins are floating. 8. machine model: a 200 pf capacitor is charged to the specifie d voltage, then discharged directly between two pins of the device with no external series resistor (i nternal resistor < 5 ). this is done for all couples of connected pin combinations while the other pins are floating. 9. charged device model: all pins and the package are charged together to the s pecified voltage and then discharged directly to the ground through only one pin. this is done for all pins.
lm2904, lm2904a absolute maximum ratings and operating conditions doc id 2471 rev 14 5/24 table 2. operating conditions symbol parameter value unit v cc supply voltage 3 to 30 v v icm common mode input voltage range 0 to v cc+ - 1.5 v t oper operating free-air temperature range -40 to +125 c
electrical characteristics lm2904, lm2904a 6/24 doc id 2471 rev 14 3 electrical characteristics table 3. v cc+ = 5 v, v cc- = ground, v o = 1.4 v, t amb = 25 c (unless otherwise specified) symbol parameter min. typ. max. unit v io input offset voltage (1) t amb = 25 c lm2904 t amb = 25 c lm2904a t min t amb t max lm2904 t min t amb t max lm2904a 2 1 7 2 9 4 mv dv io input offset voltage drift 7 30 v/c i io input offset current t amb = 25 c t min t amb t max 230 40 na di io input offset current drift 10 300 pa/c i ib input bias current (2) t amb = 25 c t min t amb t max 20 150 200 na a vd large signal voltage gain v cc+ = +15 v, r l =2k , v o = 1.4 v to 11.4 v t amb = 25 c t min t amb t max 50 25 100 v/mv svr supply voltage rejection ratio (r s 10 k ) t amb = 25 c t min t amb t max 65 65 100 db i cc supply current, all amp, no load t amb = 25c, v cc+ = +5 v t min t amb t max , v cc+ = +30 v 0.7 1.2 2 ma v icm input common mode voltage range (v cc+ = +30 v) (3) t amb = 25 c t min t amb t max 0 0 v cc+ -1.5 v cc+ -2 v cmr common-mode rejection ratio (r s = 10 k ) t amb = 25 c t min t amb t max 70 60 85 db i source output short-circuit current v cc+ = +15 v, v o = +2 v, v id = +1 v 20 40 60 ma i sink output sink current v o = 2 v, v cc+ = +5 v v o = +0.2 v, v cc+ = +15 v 10 12 20 50 ma a v oh high level output voltage (v cc+ = + 30 v) t amb = +25 c, r l = 2k t min t amb t max t amb = +25 c, r l = 10 k t min t amb t max 26 26 27 27 27 28 v
lm2904, lm2904a electrical characteristics doc id 2471 rev 14 7/24 v ol low level output voltage (r l = 10 k ) t amb = +25 c t min t amb t max 520 20 mv sr slew rate v cc+ = 15 v, v in = 0.5 to 3 v, r l = 2k , c l =100 pf, unity gain t min t amb t max 0.3 0.2 0.6 v/s gbp gain bandwidth product f = 100 khz v cc+ = 30 v, v in = 10 mv, r l = 2k , c l = 100 pf 0.7 1.1 mhz thd total harmonic distortion f = 1 khz, a v = 20 db, r l = 2 k , v o = 2 v pp , c l = 100 pf, v cc+ = 30 v 0.02 % e n equivalent input noise voltage f=1khz, r s =100 , v cc+ =30v 55 nv/ hz v o1 /v o2 channel separation (4) 1khz f 20 khz 120 db 1. v o = 1.4 v, r s = 0 , 5 v < v cc+ < 30 v, 0 v < v ic < v cc+ - 1.5 v. 2. the direction of the input current is out of the ic. this current is essentially constant, independent of the state of the ou tput, so there is no change in the l oading charge on the input lines. 3. the input common-mode voltage of either input signal volt age should not be allowed to go negative by more than 0.3 v. the upper end of the common-mode voltage range is v cc+ ?1.5 v, but either or both inputs can go to +32 v without damage. 4. due to the proximity of external components, ensure that the stray capacitance does not cause coupling between these external parts. this can typically be detected at hi gher frequencies because this ty pe of capacitance increases. table 3. v cc+ = 5 v, v cc- = ground, v o = 1.4 v, t amb = 25 c (unless otherwise specified) (continued) symbol parameter min. typ. max. unit
electrical characteristics lm2904, lm2904a 8/24 doc id 2471 rev 14 figure 2. open-loop frequency response figure 3. large signal frequency response voltage gain (db) 1.0 10 100 1k 10k 100k 1m 10m v cc = +10 to + 15v & frequency (hz) 10m v i v cc /2 v cc = 30v & 0.1 f v cc v o - + -55c t amb +125c 140 120 100 80 60 40 20 0 -55c t amb +125c frequency (hz) 1k 10k 100k 1m output swing (vpp) +7v 2k 1k 100k +15v vo - + v i 20 15 10 5 0 figure 4. voltage follower large signal response figure 5. current sinking output characteristics input voltage (v) output voltage (v) 010203040 t i m e ( s ) rl 2 k vcc = +15v 4 3 2 1 0 3 2 1 output s ink current (ma) 0,001 0,01 0,1 1 10 100 output voltage (v) vcc = +5v vcc = +15v vcc = + 3 0v - i o v o t a m b = +25c v cc /2 v cc + 10 1 0.1 0.01 figure 6. voltage follower small signal response figure 7. current sourcing output characteristics
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lm2904, lm2904a electrical characteristics doc id 2471 rev 14 9/24 figure 8. input current versus temperature figure 9. current limiting ( + + + % (( %& (( %& (( %& '( 4 ( + & '( 4 + + + figure 10. input voltage range figure 11. supply current
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figure 12. voltage gain figure 13. input current versus supply voltage 010203040 positive supply voltage (v) voltage gain (db) 160 120 80 40 l r = 20k l r=2k 5
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electrical characteristics lm2904, lm2904a 10/24 doc id 2471 rev 14 figure 14. gain bandwidth product fi gure 15. power supply rejection ratio figure 16. common-mode rejection ratio figure 17. phase margin vs capacitive load +++ '(
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lm2904, lm2904a electrical characteristics doc id 2471 rev 14 11/24 3.1 typical single-supply applications figure 18. ac coupled inverting amplifier figure 19. ac coupled non-inverting amplifier 1/2 lm2904 ~ 0 2v pp r 10 k l c o e o r 6.2 k b r 100 k f r1 10 k c i e i v cc r2 100 k c1 10 f r 3 100 k a=- r r1 v f ( as s hown a = -10) v 1/2 lm2904 ~ 0 2v pp r 10 k l c o e o r 6.2 k b c1 0.1 f e i v cc ( as s hown a = 11) v a=1+ r2 r1 v r1 100 k r2 1 m c i r 3 1 m r4 100 k r5 100 k c2 10 f figure 20. non-inverting dc gain figure 21. dc summing amplifier r1 10 k r2 1 m 1/2 lm2904 10 k e i e o +5v e o (v ) (mv) 0 a v =1+ r2 r1 (a ss hown = 101) a v 1/2 lm2904 e o e 4 e 3 e 2 e 1 100 k 100 k 100 k 100 k 100 k 100 k eo = e1 + e2 - e 3 - e4 where (e1 + e2) (e 3 + e4) to keep eo 0v figure 22. high input z, dc differential amplifier figure 23. using symmetrical amplifiers to reduce input current + 1/2 lm2904 r1 100 k r2 100 k r4 100 k r 3 100 k +v2 v1 v o 1/2 lm2904 if r1 = r5 a nd r 3 = r4 = r6 = r7 eo = [ 1 + ] (e2 - e1) a s s hown eo = 101 (e2 - e1) 2r1 r2 i b 2n 929 0.001 f i b 3 m i b e o i i e i i b i b inp u tc u rrent compen sa tion 1.5 m 1/2 lm2904 1/2 lm2904
electrical characteristics lm2904, lm2904a 12/24 doc id 2471 rev 14 figure 24. low drift peak detector figure 25. active bandpass filter 1/2 lm2904 i b 2n 929 0.001 f i b 3 r 3 m i b inp u tc u rrent compen sa tion e o i b e i z o z i c 1 f 2i b r 1 m 2i b 1/2 lm2904 1/2 lm2904 1/2 lm2904 r 8 100 k c 3 10 f r7 100 k r5 470 k c1 33 0 pf v o v c c r6 470 k c2 33 0 pf r4 10 m r1 100 k r2 100 k + v1 r 3 100 k 1/2 lm2904 1/2 lm2904 fo = 1 khz q = 50 av = 100 (40 db)
lm2904, lm2904a macromodel doc id 2471 rev 14 13/24 4 macromodel an accurate macromodel of the lm2904 is available on stmicroelectronics? web site at www.st.com . this model is a trade-off between accuracy and complexity (that is, time simulation) of the lm2904 operational amplifier. it emulates the nominal performances of a typical device within the specified operating conditions mentioned in the datasheet. it also helps to validate a design approach and to select the right operational amplifier, but it does not replace on-board measurements .
package information lm2904, lm2904a 14/24 doc id 2471 rev 14 5 package information in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack ? specifications, grade definitions and product status are available at: www.st.com . ecopack ? is an st trademark.
lm2904, lm2904a package information doc id 2471 rev 14 15/24 5.1 dip8 package information figure 26. dip8 package mechanical drawing table 4. dip8 package mechanical data ref. dimensions millimeters inches min. typ. max. min. typ. max. a5.330.210 a1 0.38 0.015 a2 2.92 3.30 4.95 0.115 0.130 0.195 b 0.36 0.46 0.56 0.014 0.018 0.022 b2 1.14 1.52 1.78 0.045 0.060 0.070 c 0.20 0.25 0.36 0.008 0.010 0.014 d 9.02 9.27 10.16 0.355 0.365 0.400 e 7.62 7.87 8.26 0.300 0.310 0.325 e1 6.10 6.35 7.11 0.240 0.250 0.280 e 2.54 0.100 ea 7.62 0.300 eb 10.92 0.430 l 2.92 3.30 3.81 0.115 0.130 0.150
package information lm2904, lm2904a 16/24 doc id 2471 rev 14 5.2 so-8 package information figure 27. so-8 package mechanical drawing table 5. so-8 package mechanical data ref. dimensions millimeters inches min. typ. max. min. typ. max. a1.750.069 a1 0.10 0.25 0.004 0.010 a2 1.25 0.049 b 0.28 0.48 0.011 0.019 c 0.17 0.23 0.007 0.010 d 4.80 4.90 5.00 0.189 0.193 0.197 e 5.80 6.00 6.20 0.228 0.236 0.244 e1 3.80 3.90 4.00 0.150 0.154 0.157 e 1.27 0.050 h 0.25 0.50 0.010 0.020 l 0.40 1.27 0.016 0.050 l1 1.04 0.040 k1 81 8 ccc 0.10 0.004
lm2904, lm2904a package information doc id 2471 rev 14 17/24 5.3 dfn8 2 x 2 mm package mechanical data figure 28. dfn8 2 x 2 mm package mechanical drawing table 6. dfn8 2 x 2 mm package mechanical data (pitch 0.5 mm) ref. dimensions millimeters inches min. typ. max. min. typ. max. a 0.51 0.55 0.60 0.020 0.022 0.024 a1 0.05 0.002 a3 0.15 0.006 b 0.18 0.25 0.30 0.007 0.010 0.012 d 1.85 2.00 2.15 0.073 0.079 0.085 d2 1.45 1.60 1.70 0.057 0.063 0.067 e 1.85 2.00 2.15 0.073 0.079 0.085 e2 0.75 0.90 1.00 0.030 0.035 0.039 e 0.50 0.020 l0.500.020 ddd 0.08 0.003
package information lm2904, lm2904a 18/24 doc id 2471 rev 14 figure 29. dfn8 2 x 2 mm footprint recommendation 2. 8 0 mm 0. 3 0 mm 0.50 mm 0.45 mm 1.60 mm 0.75 mm
lm2904, lm2904a package information doc id 2471 rev 14 19/24 5.4 tssop8 package information figure 30. tssop8 package mechanical drawing table 7. tssop8 package mechanical data ref. dimensions millimeters inches min. typ. max. min. typ. max. a1.200.047 a1 0.05 0.15 0.002 0.006 a2 0.80 1.00 1.05 0.031 0.039 0.041 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.008 d 2.90 3.00 3.10 0.114 0.118 0.122 e 6.20 6.40 6.60 0.244 0.252 0.260 e1 4.30 4.40 4.50 0.169 0.173 0.177 e 0.65 0.0256 k0 80 8 l 0.45 0.60 0.75 0.018 0.024 0.030 l1 1 0.039 aaa 0.10 0.004
package information lm2904, lm2904a 20/24 doc id 2471 rev 14 5.5 miniso-8 package information figure 31. miniso-8 package mechanical drawing table 8. miniso-8 package mechanical data ref. dimensions millimeters inches min. typ. max. min. typ. max. a 1.1 0.043 a1 0 0.15 0 0.006 a2 0.75 0.85 0.95 0.030 0.033 0.037 b 0.22 0.40 0.009 0.016 c 0.08 0.23 0.003 0.009 d 2.80 3.00 3.20 0.11 0.118 0.126 e 4.65 4.90 5.15 0.183 0.193 0.203 e1 2.80 3.00 3.10 0.11 0.118 0.122 e 0.65 0.026 l 0.40 0.60 0.80 0.016 0.024 0.031 l1 0.95 0.037 l2 0.25 0.010 k0 80 8 ccc 0.10 0.004
lm2904, lm2904a ordering information doc id 2471 rev 14 21/24 6 ordering information table 9. order codes order code temperature range package packing marking lm2904n -40 c to +125 c dip8 tube lm2904n lm2904d/dt so-8 tube or tape & reel 2904 lm2904pt tssop8 (thin shrink outline package) tape & reel lm2904st miniso-8 tape & reel k403 lm2904q2t dfn8 2 x 2 tape & reel k1y lm2904ydt (1) so-8 (automotive grade level) tape & reel 2904y LM2904AYDT (1) 2904ay lm2904ypt (2) tssop8 (automotive grade level) tape & reel 2904y lm2904aypt (2) 2904ay lm2904yst (1) miniso-8 (automotive grade level) tape & reel k409 1. qualified and characterized accordi ng to aec q100 and q003 or equivalent, adv anced screening according to aec q001 & q 002 or equivalent. 2. qualification and characteri zation according to aec q100 and q003 or equi valent, advanced screening according to aec q001 & q 002 or equivalent are on-going.
revision history lm2904, lm2904a 22/24 doc id 2471 rev 14 7 revision history table 10. document revision history date revision changes 02-jan-2002 1 initial release. 20-jun-2005 2 ppap references inserted in the datasheet, see table 9 on page 21 . esd protection inserted in table 1 on page 4 . 10-oct-2005 3 ppap part numbers added in table table 9 on page 21 . 12-dec-2005 4 pin connections identification added on cover page figure. thermal resistance junction to case information added see ta b l e 1 o n page 4 . 01-feb-2006 5 maximum junction temperature parameter added in table 1 on page 4 . 02-may-2006 6 minimum slew rate parameter in temperature table 3 on page 6 . 13-jul-2006 7 modified esd values and added explanation on v cc , v id in ta b l e 1 o n page 4 . added macromodel information. 28-feb-2007 8 modified esd/hbm values in table 1 on page 4 . updated miniso-8 package information. added note relative to automotive grade level part numbers in ta bl e 9 o n page 21 . 18-jun-2007 9 power dissipation value corrected in table 1: absolute maximum ratings . table 2: operating conditions added. equivalent input noise voltage parameter added in ta b l e 3 . electrical characteristics curves updated. figure 17: phase margin vs capacitive load added. section 5: package information updated. 18-dec-2007 10 removed power dissipation parameter from table 1: absolute maximum ratings . removed v opp from electrical characteristics in ta b l e 3 . corrected miniso-8 package mechanical data in section 5.5: miniso-8 package information . 08-apr-2008 11 added table of contents. corrected the scale of figure 5 (ma not a). corrected so-8 package information. 02-jun-2009 12 added input current information in table 1: absolute maximum ratings . added l1 parameters in table 5: so-8 package mechanical data . added new order codes, lm2904ayd/dt, lm2904aypt and lm2904ayst in table 9: order codes .
lm2904, lm2904a revision history doc id 2471 rev 14 23/24 13-apr-2010 13 added lm2904a on cover page. corrected footnote (5) in table 1: absolute maximum ratings . removed order code lm2904ayst from table 9: order codes . 24-jan-2012 14 removed macromodel from chapter 4 (now available on www.st.com ). added dfn8 2 x 2 mm package information in chapter 5 and related order codes in chapter 6 . removed lm2904yd and lm2904ayd order codes from ta bl e 9 . changed note for lm2904yst order code in ta bl e 9 . table 10. document revision history (continued) date revision changes
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