LM148 Low Power Quad 741 Operational Amplifier

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Collin Malone
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1 Low Power Quad 4 Operational mplifier Features 4 op amp operating characteristics Low supply current drain. m/amplifier lass output stage no crossover distortion Pin compatible with the LM4 Low input offset voltage. m Low input offset current 4. n Low input bias current n Unity gain bandwidth. MHz hannel eparation d Input and output overload protection Description The is a true quad 4. It consists of four independent high-gain, internally compensated, low-power operational amplifiers which have been designed to provide functional characteristics identical to those of the familiar 4 operational amplifier. In addition, the total supply current for all four amplifiers is comparable to the supply current of a single 4 type op amp. Other features include input offset currents and input bias currents which are much less than those of a standard 4. lso, excellent isolation between amplifiers has been achieved by independently biasing each amplifier and using layout techniques which minimize thermal coupling. The can be used anywhere multiple 4 type amplifiers are being used and in applications where amplifier matching or high packing density is required. lock Diagram Input () +Input () + Output () D + Input (D) +Input (D) Output (D) Output () Output () +Input () Input () + + +Input () Input () -4- Rev...

2 PRODUT PEIFITION Pin ssignments Output () Input ()) +Input () + +Input () Input () Output () 4 4 Output (D) Input (D) +Input (D) Ground +Input () Input () Output () -4- bsolute Maximum Ratings Parameter Min. Max. Unit upply oltage - + Differential Input oltage 44 Input oltage - + Output hort ircuit Duration Indefinite torage Temperature Range - + Operating Temperature Range - + Lead oldering Temperature ( sec.) + Notes:. For supply voltages less than ±, the absolute maximum input voltage is equal to the supply voltage.. hort circuit to ground on one amplifier only. Thermal haracteristics Parameter Maximum Junction Temperature Maximum PD T < Thermal Resistance, qj Thermal Resistance, qj For T > derate at 4-Lead eramic DIP + 4 mw /W /W. mw/

3 PRODUT PEIFITION Electrical haracteristics ( = ± and T =, unless otherwise noted) Parameter Test onditions Min. Typ. Max. Unit Input Offset oltage R KW.. m Input Offset urrent 4. n Input ias urrent n Input Resistance (Differential Mode).. MW upply urrent, ll mplifiers = ±.4. m Large ignal oltage Gain = ±, OUT = ±, /m RL ³ KW hannel eparation F = Hz KHz d Unity Gain andwidth. MHz Phase Margin Degrees lew Rate. /m hort ircuit urrent m The following specifications apply for = ±, - T +. Input Offset oltage R KW. m Input Offset urrent n Input ias urrent n Large ignal oltage Gain = ±, OUT =, RL < KW /m Output oltage wing = ± RL = KW ± ± RL = KW ± ± Input oltage Range = ± ± ommon Mode Rejection Ratio R KW d Power upply Rejection Ratio R KW d Note:. Guaranteed by design but not tested.

4 PRODUT PEIFITION Typical Performance haracteristics I Y (m) ± ± ± ± ± ± -4- I (n) 4 - = ± = ± = ± = ± ± () T ( ) Figure. upply urrent vs. upply oltage Figure. Input ias urrent vs. Temperature OUT P-P () 4 T = + ± ± ± ± ± ± -4- OUT () = +I OURE (m) -4- Figure. Output oltage wing vs. upply oltage Figure 4. Positive urrent Limit Output oltage vs. Output ource urrent OUT () = ± + - I INK (m) -4- R OUT ( W ) K = T = + = = =.. K K K F (Hz) M -4- Figure. Negative urrent Limit Output oltage vs. Output ink urrent Figure. Output Impedance vs. Frequency 4

5 PRODUT PEIFITION Typical Performance haracteristics (continued) = T = + = T = + MRR (d) 4 (d) K K K M M F (Hz) K K K M F (Hz) -4- M Figure. MRR vs. Frequency Figure. Open Loop Gain vs. Frequency (d) = T = + F 4 - F (MHz) F (Deg) -4- W K K OUT -4- Figure. Gain, Phase vs. Frequency Figure. Gain, Phase Test ircuit OUT (m) IN (m) - - = T = + = -4- OUT () IN () - - = T = + = R K L Time ( m) 4 Time ( m) Figure. mall ignal Pulse Response Input, Output oltage vs. Time Figure. Large ignal Pulse Response Output oltage vs. Time

6 PRODUT PEIFITION Typical Performance haracteristics (continued) OUT () 4 = T = + = R L = K < % Dist. GW (MHz) K K K F (Hz) T ( ) -4- Figure. Undistorted Output oltage wing vs. Frequency Figure 4. Gain andwidth Product vs. Temperature 4 - R (/ m ) T ( ) M () () -4- Figure. lew Rate vs. Temperature Figure. Negative ommon Mode Input oltage vs. upply oltage OUT () IN () - - = T = + = R = K 4 4 Time ( m) L -4- e n (n Hz) 4 4 = T = + e n I N K K F (Hz) I N (p Hz) -4- Figure. Inverting Large ignal Pulse Response Input, Output oltage vs. Time Figure. Input Noise oltage, urrent Densities vs. Frequency

7 PRODUT PEIFITION Typical Performance haracteristics (continued) T + + M () + () -4- Figure. Positive ommon Mode, Input oltage vs. upply oltage Typical imulation + s + s (+) R.K.4 pf R.K H * pf. R O W D OUT (-) RE.K RE.K E Gen. W G. m W R K G 4. mw R O 4.K D D D4 R. O mw 4. W. -s E c.4 pf RE.M. µ b = b O O = 4 I = x s Figure. Macromodel for omputer imulation

8 pplications Discussion The low power quad operational amplifier exhibits performance comparable to the popular 4. ubstitution can therefore be made with no change in circuit behavior. The input characteristics of these devices allow differential voltages which exceed the supplies. Output phase will be correct as long as one of the inputs is within the operating common mode range. If both exceed the negative limit, the output will latch positive. urrent limiting resistors should be used on the inputs in case voltages become excessive. PRODUT PEIFITION The is short circuit protected to ground and supplies continuously when only one of the four amplifiers is shorted. If multiple shorts occur simultaneously, the unit can be destroyed due to excessive power dissipation. To assure stability and to minimize pickup, feedback resistors should be placed close to the input to maximize the feedback pole frequency (a function of input to ground capacitance). good rule of thumb is that the feedback pole frequency should be times the operating -. frequency. If less, a lead capacitor should be placed between the output and input. When capacitive loading becomes much greater than pf, a resistor should be placed between the output and feedback connection in order to reduce phase shift. R R4 R D Q R R D R F = x K p R R4R K = + + R R R4 D R R OUT R -4- R R ~ ON D / G - P F MX =. KHz, THD.% R = K pot., =.4 mf, =. m F, =. mf, R = R = R = M, R =.K, R4 = W. R = 4 W, Q = N, D = N4, D =. avalanche diode (ex. LM), s = simpler version with some distortion degradation at high frequencies can be made by using as a simple inverting amplifier, and by putting back to back zeners in feedback loop of. Figure. One Decade Low Distortion inewave Generator

9 PRODUT PEIFITION pplications Discussion (continued) - IN R R/ R R R R/ OUT R + IN R OUT = R +, - - IN M + - = ± R = R, trim R to boost MRR -4-4 Figure. Low ost Instrumentation mplifier IN D N4 D djust R for minimum drift D low leakage diode D added to improve speed = K D N4 P I I R M N R M I I PEK (+ ) -4- Figure. Low oltage Peak Detector with ias urrent ompensation

10 PRODUT PEIFITION pplications Discussion (continued) R K IN R R R K HP R R4. mf R. mf R L LP Tune Q through R for predictable results: F O Q 4 x 4 Use bandpass output to tune for Q (s) IN (s) = N(s) D(s) D(s) = + w Q + w R H R F D 4 R N HP() = H OHP, N P() = -w H OP Q N LP = w H OLP F O = F NOTH = H OLP = p p R R R H R L t t tt, t = R, Q = + R4 R + R4 R + R R / + R R + R R + R R4, H OHP = + R R + R R + R R4, H OP = R R t t / + R4 R + R4 R + R R + R R4-4- Figure 4. Universal tate-pace Filter K K. mf. mf IN K 4.K K.K.K OUT K.4K K.K K K. mf.k. mf OUT Use general equations, and tune each section separately. Q st ection =.4, Q nd ection =.. The response should have d peaking. -4- Figure. KHz 4-Pole utterworth Filter

11 PRODUT PEIFITION pplications Discussion (continued) R R R R R R OUT() R R4 IN() Q = R R R RR Necessary condition for notch : F R, o =, F NOTH p R RR R = R R4R = p R RRR Examples: F NOTH = khz, Q =, R = K, R = R = K, R4 = K, R = K, R = R = K, R = K. = =. µf. etter noise performance than the state-space approach. Figure. mplifier i-quad Notch Filter -4- IN R R R R4 RH R R K P R L R (d) Gain vs Frequency K K K F (Hz) R' R' R' P' R'4 R' ' R' H R' ' R' L R' F K D 4 OUT F = khz, F = khz, F P =.4. F Z =.4, Q =.4, F' P =., F' Z = 4.. Q' = 4.4 normalized to ripple W. F P = p R R t, F = Z p RH R L t, Q = + R4/R + R4/R x + R/R R R, Q' = R' R' x + R'4/R' + R'/R' + R'/R P R P = R H R L R H + R L Use the 'P outputs to tune Q, Q', tune the sections separately. R = R =.K, R = R4 = R = K, R = K, R =.K, R L = K, R H =.K, R' = R' =.K, R'4 = R' = K, R' = K, R' =.K, R' L = K, R' H = 4.K, R' F = K. -4- ll capacitors are.µf. Figure. 4th Order KHz Elliptic Filter (4 Poles, 4 Zeros)

12 PRODUT PEIFITION Notes:

13 PRODUT PEIFITION Notes:

14 PRODUT PEIFITION Notes: 4

15 PRODUT PEIFITION Mechanical Dimensions 4-Pin eramic DIP ymbol Inches Millimeters Min. Max. Min. Max... Notes b.4... b c.... D..4 4 E e..4, e.. L.... Q s a Notes:. Index area: a notch or a pin one identification mark shall be located adjacent to pin one. The manufacturer's identification shall not be used as pin one identification mark.. The minimum limit for dimension "b" may be. (.mm) for leads number,, and 4 only.. Dimension "Q" shall be measured from the seating plane to the base plane. 4. This dimension allows for off-center lid, meniscus and glass overrun.. The basic pin spacing is. (.4mm) between centerlines. Each pin centerline shall be located within ±. (.mm) of its exact longitudinal position relative to pins and 4.. pplies to all four corners (leads number,,, and 4).. "e" shall be measured at the center of the lead bends or at the centerline of the leads when "a" is.. ll leads Increase maximum limit by. (.mm) measured at the center of the flat, when lead finish applied.. Twelve spaces. D NOTE E s 4 e e Q L a c b b

16 PRODUT PEIFITION Ordering Information Part Number Package Operating Temperature Range D 4-Lead eramic DIP - to + D/ 4-Lead eramic DIP - to + Note:. suffix denotes Mil-td-, Level processing LIFE UPPORT POLIY FIRHILD PRODUT RE NOT UTHORIZED FOR UE RITIL OMPONENT IN LIFE UPPORT DEIE OR YTEM WITHOUT THE EXPRE WRITTEN PPROL OF THE PREIDENT OF FIRHILD EMIONDUTOR ORPORTION. s used herein:. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user.. critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. //.m tock#d4 Ó Fairchild emiconductor orporation

AOZ6115 High Performance, Low R ON, SPST Analog Switch

AOZ6115 High Performance, Low R ON, SPST Analog Switch OZ6115 High Performance, Low R ON, PT nalog witch General Description The OZ6115 is a high performance single-pole single-throw (PT), low power, TTL-compatible bus switch. The OZ6115 can handle analog