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1 lm2904/lm2902 1 .2 mhz, low - power 36v op amps www.3 peakic .com .cn r ev. a.01 features ? internal frequency compensation for unity gain ? high dc voltage gain : 1 1 0db(typ) ? wide bandwidth at unity gain : 1 .2 mhz(typ) ? wide power supply range: 3v to 3 6 v ? dual supplies : 1.5v to 1 8 v ? emirr in+: 71 db(under 1 ghz) ? low supply current : 10 0 a(typ) ? offset voltage temperature drift: 1 uv/ c ? input bias current: 60 p a typical ? input common - mode voltage range includes ground ? rail - to - rail output ? no phase reversal for overdriven inputs ? C 40c to 125c operati on range ? esd rating : robust 2 kv C hbm , 2kv C cdm and 500v C m m ? high performance drop - in compatible with 2904 , 2902 series product applications ? w alkie - t alkie ? battery management solution ? transducer amplifiers ? summing amplifiers ? multivibrators ? oscillators ? dc gain blocks pin configuration (top view) description lm 2904/2902 types consist of single/dual/quad channel ind ependent, high gain, internally frequency compensated operational amplifiers which are designed specifically to operate from a single power supply over a wide range of voltages. they may also be operated from split power supplies. the supply current is basically independent of the supply voltage over the recommended voltage range. these devices are particularly usef ul in interface circuits with digital systems and can be operated from the single common 5v dc power supply. they are also intended for transducer amplifiers, dc gain blocks and many other conventional op amp circuits which can benefit from the single power supply capability. in the linear mode, the input common - mode voltage range includes ground and the output voltage can also swing to both ground and power rail , even though operated from a single power supply. the lm 2904 is dual channel version available in 8 - pin sop and msop packages. the lm 2902 is quad channel version available in 14 - pin sop and tssop packages. 3peak and the 3peak logo are registered trademarks of 3peak incorporated . all other trademarks are the property of their respective owners. 3 p e a k 1 4 1 3 1 2 1 1 1 0 9 8 6 5 7 3 2 1 4 o u t a - v s + i n a - i n a + v s d a c b o u t d + i n d - i n d o u t b + i n b - i n b o u t c + i n c - i n c l m 2 9 0 2 1 4 - p i n s o i c / t s s o p ( - s a n d - t s u f f i x e s ) 8 6 5 7 3 2 1 4 o u t a - v s + i n a - i n a + v s + i n b - i n b o u t b a b l m 2 9 0 4 8 - p i n s o i c / m s o p ( - s a n d - v s u f f i x e s )
2 r ev. a.01 www.3 peakic .com .cn lm2904 / lm2902 1 .2 mhz, low - power 36v op amps order information model name order number package transport media, quantity marking information lm 2904 lm 2904 - s r 8 - pin so p tape and reel, 4,000 lm 2904 lm 2904 - v r 8 - pin msop tape and reel, 3,000 lm 2904 lm 2902 lm 2902 - s r 14 - pin so p tape and reel, 2,5 00 lm 2902 lm 2902 - t r 14 - pin tssop tape and reel, 3,000 lm 2902 absolute maximum ratings note 1 supply voltage: v + C v C note 2 ...................... .. ..... . ... 42 v input voltage . ...................... ... .. . ... v C C 0. 3 to v + + 0. 3 input current: +in, C in note 3 .... . . ......... .. .......... . 2 0ma differential input voltage .... ...................... .... ....... 42v output short - circuit duration note 4 .. ..... ...... . . in finite current at supply pins .. ............. 60 ma operating temperature range..... . . . C 40c to 12 5c maximum junction temperature................... 150c storage temperature range....... . .. C 65c to 150c lead temperature (soldering, 10 sec) ..... .... 260c note 1 : stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. exposure to any absolut e maximum rating condition for exte nded periods may affect device reliability and lifetime. note 2 : the op amp supplies must be established simultaneously , with, or before, the application of any input signals. note 3 : the inputs are protected by esd protection diodes to each power supply. if the input extends more than 500mv beyond the power supply, the input current should be limited to less than 10ma. note 4 : a heat sink may be required to keep the junction temperature below the absolute maximum. this depends on the power supply voltage and how many amplifiers are shorted. thermal resistance varies with the amount of pc board metal connected to the package. the specified values are for short traces connected to the leads. esd, electrostatic discharge protection symbol parameter condition minimum level unit hbm human body model esd mil - std - 883h method 3015.8 2 kv cdm charged device model esd jedec - eia/jesd22 - c101e 2 kv thermal r e sistance package type ja j c unit 8 - pin so p 158 43 c /w 8 - pin msop 210 45 c /w 14 - pin so p 120 36 c /w 14 - pin tssop 180 35 c /w
3 lm2904/lm2902 1 .2 mhz, low - power 36v op amps www.3 peakic .com .cn r ev. a.01 electrical characteristics the specifications are at t a = 27 c. v s = 5v , v cm = v out = 2.5 v, r l = 2k, c l =100pf , u nless otherwise noted. symbol parameter conditions min typ max units v os input offset voltage v s = 5 v , v cm = 2.5v and v cm = 0v - 3 1 3 m v v s = 30 v , v cm = 15v and v cm = 0v - 3 1 3 m v v os tc input offset voltage drift - 40 c to 125 c 1 v/ c i b input bias current t a = 27 c 60 p a t a = 85 c 200 pa i os input offset current 0.001 p a v n input voltage noise f = 0.1hz to 10hz 10 v pp e n input voltage noise density f = 1khz 48 nv/hz i n input current noise f = 1khz 2 fa /hz c in input capacitance differential common mode 2.5 5 pf cmrr common mode rejection ratio dc, v s = 30v, v cm = 0v to 28 v 80 120 db v cm common - mode input voltage range v s = 5 v to 30v v C v + - 2 v psrr power supply rejection ratio v s = 5 v to 30v 90 120 db a v ol open - loop large signal gain v s = 15 v, v o = 1 v to 11 v, r l = 2 k 98 1 10 db v oh output swing from supply rail r load = 10k , v s = 15 v 14.7 0 14.75 v r load = 2 k , v s = 15 v 13.70 13.90 v v ol output swing from supply rail r load = 10k , v s = 15 v - 14.85 - 14.70 v r load = 2 k , v s = 15 v - 14.25 - 14.10 v r load 10 k , v s = 15 v 5 m v r out closed - loop output impedance a v = 1, f =1khz, i o ut = 0 0.002 r o open - loop output impedance f = 1khz, i o ut = 0 120 i sc output short - circuit current sink or source current , v s = 30v 20 35 m a v s supply voltage 3 36 v i q quiescent current per amplifier v s = 5v , no load 100 150 a v s = 30v , no load 110 200 a pm phase margin r load = 1 k, c load = 10 0pf 62 gm gain margin r load = 1 k, c load = 6 0pf 18 db gbw p gain - bandwidth product f = 1khz 1 .2 m hz sr slew rate at unity gain a v = 1, v s = 15 v , v out = - 10 v to 10 v, c load =60pf, r load = 1 0 k 0.55 v/s fpbw full power bandwidth note 1 17.5 khz t s settling time, 0.1% settling time, 0.01% a v = - 1 , v out = 1 v step 2.8 3.1 s thd+ n total harmonic distortion and noise f = 1khz, a v =1, r l = 2k, v out = 1vp - p 0.001 % x talk channel separation f = 1 khz to 20 khz 80 db note 1 : full power bandwidth is calculated from the slew rate fpbw = sr/ ? v p - p
4 r ev. a.01 www.3 peakic .com .cn lm2904 / lm2902 1 .2 mhz, low - power 36v op amps typical performance characteristics v s = 15 v, v cm = 0v, r l = open, unless otherwise specified. offset voltage production distribution unity gain bandwidth vs. temperature open - loop gain and phase input voltage noise spectral density input bias current vs. temperature input bias current vs. input common mode voltage 0 200 400 600 800 1000 1200 -3 -2.6 -2.2 -1.8 -1.4 -1 -0.6 -0.2 0.2 0.6 1 1.4 1.8 2.2 2.6 3 population offset voltage(mv) number = 15200pcs 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 -40 -25 -10 5 20 35 50 65 80 95 110 125 gbw(mhz) temperature( ) -100 -50 0 50 100 150 200 -100 -50 0 50 100 150 0.01 1 100 10k 1m phase ( ) gain(db) frequency (hz) 1 10 100 1000 1 10 100 1k 10k 100k 1m noise(nv/hz) frequency(hz) v cc = +5v r l = 1m c l = 30pf 10 100 1000 10000 -40 -20 0 20 40 60 80 100 120 input bias current(pa) temperature( ) 1 10 100 1000 8 12 16 20 24 28 input bias current(a) common mode voltage(v) v cc = +36v r l = 1m c l = 30pf
5 lm2904/lm2902 1 .2 mhz, low - power 36v op amps www.3 peakic .com .cn r ev. a.01 typical performance characteristics v s = 15 v, v cm = 0v, r l = open, unless otherwise specified. (continued) common mode rejection ratio cmrr vs. frequency quiescent current vs. temperature short circuit current vs. temperature power - supply rejection ratio quiescent current vs. supply voltage 0 20 40 60 80 100 120 140 0 5 10 15 20 25 cmrr(db) common - mode voltage(v) -20 0 20 40 60 80 100 120 140 1 100 10k 1m cmrr(db) frequency(hz) 40 60 80 100 120 140 -40 -25 -10 5 20 35 50 65 80 95 110 125 supply current(ua) temperature( ) 0 5 10 15 20 25 30 35 -40 -25 -10 5 20 35 50 65 80 95 110 125 ishort(ma) temperature( ) i sink i source -20 0 20 40 60 80 100 120 140 160 0.01 1 100 10k 1m psrr(db) frequency(hz) psrr+ psrr - 0 20 40 60 80 100 120 3 6 9 12 15 18 21 24 27 30 supply current(ua) supply voltage(v)
6 r ev. a.01 www.3 peakic .com .cn lm2904 / lm2902 1 .2 mhz, low - power 36v op amps typical performance characteristics v s = 15 v, v cm = 0v, r l = open, unless otherwise specified. (continued) power - supply rejection ratio vs. temperature cmrr vs. temperature emirr in+ vs. frequency small - scale step response negative over - voltage recovery positive over - voltage recovery 0 20 40 60 80 100 120 140 160 -40 -25 -10 5 20 35 50 65 80 95 110 125 psrr db) temperature 0 20 40 60 80 100 120 140 160 -40 -25 -10 5 20 35 50 65 80 95 110 125 cmrr db) temperature 0 20 40 60 80 100 120 140 1 10 100 1000 emirr in+(db) frequency(mhz) 100mv/div 100mv/div time (5 s/div) gain= +1 v= 15v c l =30pf, r l =1m 1v/div 5v/div time (50 s/div) gain= +10 + v= + 30v 1v/div 5v/div time (50 s/div) gain= +10 + v= + 30v
7 lm2904/lm2902 1 .2 mhz, low - power 36v op amps www.3 peakic .com .cn r ev. a.01 typical performance characteristics v s = 15 v, v cm = 0v, r l = open, unless otherwise specified. (continued) 0.1 hz to 10 hz i nput voltage noise o ffset v oltage vs c ommon - m ode v oltage large - scale step response positive output swing vs. load current negative output swing vs. load current 0 0.2 0.4 0.6 0.8 1 1.2 1.4 0 5 10 15 20 25 offset voltage(mv) common - mode voltage(v) 0 1 2 3 4 5 6 0 10 20 30 vdrop(v) i source(ma) t= - 40 t=25 t=130 0 1 2 3 4 5 6 0 10 20 30 40 vdrop(v) i sink (ma) t= - 40 t=25 t=130 time (1s/div) 5 v/div 2v/div 2v/div time (20 s/div) gain= +1 v= 15v c l =30pf, r l =1m
8 r ev. a.01 www.3 peakic .com .cn lm2904 / lm2902 1 .2 mhz, low - power 36v op amps pin functions - in: inverting input of the amplifier. +in: non - inverting input of amplifier. out: amplifier output. the voltage range extends to within mv of each supply rail. v+ or +v s : positive power supply. typically the voltage is from 3 v to 36 v. split supplies are possible as long as the voltage between v+ and v C is between 3 v and 36 v. a bypass capacitor of 0.1f as close to the part as possible should be used between power supply pins or between supply pins and ground. v - or - v s : negative power supply. it is normally tied to ground. it can also be tied to a voltage other than ground as long as the voltage between v + and v C is from 3 v to 36 v. if it is not connected to ground, bypass it with a capacitor of 0.1f as close to the part as possible. operation the lm 2904/2902 input signal range extends beyond the negative and positive power supplies. the output can even extend all the way to the negative supply. the input stage is comprised of two cmos differential amplifiers, a pmos stage and nmos stage that are active over different ranges of common mode input voltage. the class - ab control buffer and output bias stage uses a proprietary compensation technique to take full advantage of the process technology to drive very high capacitive loads. this is evident from the transient over shoot measurement plots in the typical performance characteristics. applications information high supply voltage and low power consumption the lm 2904/2902 of operational amplifiers can operate w ith power supply voltages from 3 v to 3 6 v. each amplifier draws only 10 0 a quiescent current . the low supply voltage capability and low supply current are ideal for portable applications demanding h igh c apacitive l oad d riving c apability and w ide b andwidth . the lm 2904/2902 is optimized for wide bandwidth low power applications. they have a n industry leading high gbw p to power ratio and are unity gain stable for 10 nf capacitive load . when the load capacitance increases, the increased capacitance at the output pushed the non - dominant pole to lower frequency in the open loop frequency response, lowering the phase and gain margin. higher gain configurations tend to have better capacitive drive capability than lower gain configurations due to lower closed loop bandwidth and hence higher phase margin. low input referred noise the lm 2904/2902 provides a low input referred noise density of 48 nv/ hz at 1khz. the voltage noise will grow slowly with the frequency in wideband range , and the input voltage noise is typically 1 0 v p - p at the frequency of 0.1hz to 10hz. low input offset voltage the lm 2904/2902 has a low offset voltage tolerance of 3 m v maximum which is essential for precision applications. the offset voltage is trimmed with a proprietary trim algorithm to ensure low offset voltage for precision signal processing requirement . low input bias current the lm 2904/2902 is a cmos opa family and features very low input bias current in pa range. t he low input bias current allows the amplifiers to be used in applications with high resistance sources. care must be taken to minimize pcb surface leakage. see below section on pcb surface leakage for more details.
9 lm2904/lm2902 1 .2 mhz, low - power 36v op amps www.3 peakic .com .cn r ev. a.01 pcb surface leakage in applications where low input bias current is critical, printed circuit board (pcb) surface leakage effects need to b e considered. surface leakage is caused by humidity, dust or other contamination on the board. under low humidity conditions, a typical resistance between nearby traces is 10 12 . a 5v difference would cause 5pa of current to flow, which is greater than the lm 2904/2902 opa? s input bias current at +27 c (1pa, typical). it is recommended to use multi - layer pcb layout and rout e the opa?s - in and +in signal under the pcb surface. the effective way to reduce surface leakage is to use a guard ring around sensitive pins (or traces). the guard ring is biased at the same voltage as the sensitive pin. an example of this type of layout is shown in figure 1 for inverting gain application . 1. for non - i nverting gain and unity - gain buffer: a) connect the non - inverting pin (v in +) to the input with a wire that does not touch the pcb surface. b) connect the guard ring to the inverting input pin (v in C ). this biases the guard ring to the common mode input voltage. 2. for inverting gain and trans - impedance gain amplifiers (convert current to voltage, such as photo detectors): a) connect the guard ring to the non - inverting input pin (v in +). this biases the guard ring to the same reference voltage as the op - amp (e.g., v dd /2 or ground). b) connect the inverting pin (v in C ) to the input with a wire that does not touch the pcb surfac e. figure 1 ground sensing and rail to rail output the lm 2904/2902 has excellent output drive capability, delivering over 35 ma of output drive current. the output stage is a rail - to - rail topology that is capable of swinging to within 5 mv of either rail. since the inputs can go 100mv beyond either rail, the op - amp can easily perform ? t rue g round s ensing?. the maximum output current is a function of total supply voltage. as the supply voltage to the amplifier increases, the output current capability also increases. attention must be paid to keep the junction temperature of the ic below 150c when the output is in continuous short - circuit. the output of the amplifier has reverse - biased esd diodes connected to each supply. the output should not be forced more than 0.5v beyond either supply, otherwise current will flow through these diodes. esd the lm 2904/2902 has reverse - biased esd protection diodes on all inputs and output. input and out pins cannot be biased more than 200mv beyond either supply rail. feedback components and s uppression of r inging care should be taken to ensure that the pole formed by the feedback resistors and the parasitic capacitance at the inverting input does not degrade stability. for example, in a gain of +2 configuration with gain and feedback resistors of 10k, a poorly designed circuit board layout with parasitic capacitance of 5pf (part +pc board) at the amplifier?s inverting input will cause the amplifier to ring due to a pole formed at 1.2 mhz . an additional capacitor of 5pf across the feedba ck resistor as shown in figure 2 will eliminate an y ringing . careful layout is extremely important because low power signal conditioning applications demand high - impedance circuits. the layout should also minimize stray capacitance at the opa?s inputs. however some stray capacitance may be unavoidable and it may be necessary to add a 2pf to 10pf capacitor acros s the feedback resistor. select the smallest capacitor value that ensures stability. v i n + v i n - + v s g u a r d r i n g
10 r ev. a.01 www.3 peakic .com .cn lm2904 / lm2902 1 .2 mhz, low - power 36v op amps figure 2 driving large capacitive load the lm 2904/2902 of opa is designed to drive large capacitive loads. refer to typical performance characteristics for phase margin vs. load capacitance. as always, larger load capacitance decreases overall phase margin in a feedback system where internal frequency compensation is utilized. as the load capacitance increases, the feedback loop?s phase margin decreases, and the closed - loop bandwidth is reduced. this produces gain peaking in the frequency response, with overshoot and ringing in output step response. the unity - gain buffer (g = +1v/v) is the most sensitive to large capacitive loads. when driving large capacitive loads with the lm 2904/2902 (e.g., > 2 00 pf when g = +1v/v), a small series resistor at the output (r iso in figure 3 ) improves the feedback loop?s phase margin and stability by making the output load resistive at higher frequencies. figure 3 power supply layout a nd bypass the lm 2904/2902 opa ?s power supply pin (v dd for single - supply) should have a local bypass capacitor (i.e., 0.01 f to 0.1 f) within 2mm for good high frequency performance. it can also use a bulk capacitor (i.e., 1f or larger) within 100mm to provide large, slow currents. this bulk capacitor can be shared with other analog parts. ground layout improves performance by decreasing the amount of stray cap acitance and noise at the opa ?s inputs and outputs. to decrease stray capacitance, minimize pc board lengths and resistor leads, and pl ace external components as close to the op amps? pins as possible. proper board l ayout to ensure optimum performance at the pcb level, care must be taken in the design of the board layout. to avoid leakage currents, the surface of the board should be kept clean and free of moisture. coating the surface creates a barrier to moisture accumulation and helps reduce parasitic resistance on the board. keeping supply traces short and properly bypassing the power supplies minimizes power supply disturbances due to output current variation, such as when driving an ac signal into a heavy load. bypass capacitors should be connected as closely as possible to the device supply pins. stray capacitances are a concern at the outputs and the inputs of the amplifier. it is recommended that signal traces be kept at least 5mm from supply lines to minimize coupling. a variation in temperature across the pcb can cause a mismatch in the seebeck voltages at solder join ts and other points where dissi milar metals are in contact, resulting in thermal voltage errors. to minimize these thermocouple effects, orient resistors so heat sources warm both ends equally. input signal p aths should contain matching numbers 1 0 k 5 p f 1 0 k c p a r v i n v o u t v i n v o u t c l o a d r i s o
11 lm2904/lm2902 1 .2 mhz, low - power 36v op amps www.3 peakic .com .cn r ev. a.01 and types of components, where possible to match the number and type of thermocouple junctions. for example, dummy components such as zero value resistors can be used to match real resistors in the opposite input path. matching components should be located in close proximity and should be oriented in the same manner. ensure leads are of equal length so that thermal conduction is in equilibrium. keep heat sources on the pcb as far away from amplifier input circuitry as is practical. the use of a ground plane is highly recommended. a ground plane reduces emi noise and also helps to maintain a constant temperature across the circuit board.
12 r ev. a.01 www.3 peakic .com .cn lm2904 / lm2902 1 .2 mhz, low - power 36v op amps revision history the revision history provided is for informational purposes only and is believed to be accurate, but not warranted. please go to web to make sure you have the latest revision. revision change rev . a initial release
13 lm2904/lm2902 1 .2 mhz, low - power 36v op amps www.3 peakic .com .cn r ev. a.01 package outline dimensions sc70 - 5 /sot - 353 sot23 - 5 symbol dimensions in millimeters dimensions in inches 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 0.460 0.012 0.024 0 8 0 8 symbol dimensions in millimeters dimensions in inches 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
14 r ev. a.01 www.3 peakic .com .cn lm2904 / lm2902 1 .2 mhz, low - power 36v op amps package outline dimensions so p - 8 symbol dimensions in millimeters dimensions in inches min max min max 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 1.270 typ 0.050 typ l1 0.400 1.270 0.016 0.050 0 8 0 8 d e 1 b e a 1 a 2 e l 1 c
15 lm2904/lm2902 1 .2 mhz, low - power 36v op amps www.3 peakic .com .cn r ev. a.01 package outline dimensions msop - 8 symbol dimensions in millimeters dimensions in inches 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 e 2.900 3.100 0.114 0.122 e1 4.700 5.100 0.185 0.201 l1 0.410 0.650 0.016 0.026 0 6 0 6 e 1 e e a 1 a 2 a d l 1 l 2 l r r 1 b
16 r ev. a.01 www.3 peakic .com .cn lm2904 / lm2902 1 .2 mhz, low - power 36v op amps package outline dimensions tssop - 14 symbol dimensions in millimeters min typ max a - - 1.20 a1 0.05 - 0.15 a2 0.90 1.00 1.05 b 0.20 - 0.28 c 0.10 - 0.19 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 - - 0 - 8 e e e 1 a 1 a 2 a d l 1 l 2 l r r 1 c
17 lm2904/lm2902 1 .2 mhz, low - power 36v op amps www.3 peakic .com .cn r ev. a.01 package outline dimensions so p - 14 symbol dimensions in millimeters min typ max a 1.35 1.60 1.75 a1 0.10 0.15 0.25 a2 1.25 1.45 1.65 b 0.36 0.49 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 0 8 e b e 1 e d a 1 a a 2 l 1 l l 2

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