Low Noise, Precision, High Speed a > Operational Amplifier (A 5) VCL OP37 FEATURES The output stage has good load driving capability. A guaranteed Low Noise, 80 nV p-p (0.1 Hz to 10 Hz) swing of 10 V into 600 W and low output distortion make the 3 nV/Hz 1 kHz OP37 an excellent choice for professional audio applications. Low Drift, 0.2 V/ C PSRR and CMRR exceed 120 dB. These characteristics, coupled High Speed, 17 V/ s Slew Rate with long-term drift of 0.2 mV/month, allow the circuit designer 63 MHz Gain Bandwidth to achieve performance levels previously attained only by Low Input Offset Voltage, 10 V discrete designs. Excellent CMRR, 126 dB (Common-Voltage 11 V) Low-cost, high-volume production of the OP37 is achieved by High Open-Loop Gain, 1.8 Million using on-chip zener-zap trimming. This reliable and stable offset Replaces 725, OP-07, SE5534 In Gains > 5 trimming scheme has proved its effectiveness over many years of Available in Die Form production history. GENERAL DESCRIPTION The OP37 brings low-noise instrumentation-type performance to The OP37 provides the same high performance as the OP27, such diverse applications as microphone, tapehead, and RIAA but the design is optimized for circuits with gains greater than phono preamplifiers, high-speed signal conditioning for data five. This design change increases slew rate to 17 V/ms and acquisition systems, and wide-bandwidth instrumentation. gain-bandwidth product to 63 MHz. PIN CONNECTIONS The OP37 provides the low offset and drift of the OP07 plus higher speed and lower noise. Offsets down to 25 mV and 8-Lead Hermetic DIP a maximum drift of 0.6 mV/ C make the OP37 ideal for preci- (Z Suffix) sion instrumentation applications. Exceptionally low noise Epoxy Mini-DIP (e = 3.5 nV/ 10 Hz), a low 1/f noise corner frequency of n (P Suffix) 2.7 Hz, and the high gain of 1.8 million, allow accurate 8-Lead SO high-gain amplification of low-level signals. (S Suffix) The low input bias current of 10 nA and offset current of 7 nA are achieved by using a bias-current cancellation circuit. Over the military temperature range this typically holds I and I 1 8 V TRIM V TRIM B OS OS OS OP37 to 20 nA and 15 nA respectively. IN 2 7 V+ +IN 3 6 OUT V 4 5 NC NC = NO CONNECT SIMPLIFIED SCHEMATIC V+ C2 R3 R4 18 Q6 Q22 Q46 C1 V ADJ. OS R23 R24 R1* R2* Q21 Q23 Q24 R9 Q20 Q19 OUTPUT Q1A Q1B Q2B Q2A R12 NON-INVERTING C3 C4 R5 INPUT (+) Q3 Q26 INVERTING Q11 Q12 Q45 INPUT () Q27 Q28 *R1 AND R2 ARE PERMANENTLY ADJUSTED AT WAFER TEST FOR MINIMUM OFFSET VOLTAGE. V REV. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. use, nor for any infringements of patents or other rights of third parties that Tel: 781/329-4700 www.analog.com may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781/326-8703 Analog Devices, Inc., 2002OP37 4 ABSOLUTE MAXIMUM RATINGS ORDERING GUIDE Supply Voltage 22 V T = 25 COperating A Internal Voltage (Note 1 ) . 22 V V MAX CerDIP Plastic Temperature OS Output Short-Circuit Duration . Indefinite ( V) 8-Lead 8-Lead Range Differential Input Voltage (Note2) . 0.7 V Differential Input Current (Note 2) 25 mA 25 OP37AZ* MIL Storage Temperature Range . 65 C to +150C 25 OP37EZ OP37EP IND/COM Operating Temperature Range 60 OP37FP* IND/COM OP37A 55 C to +125C 100 OP37GP XIND OP37E (Z) 25 C to +85 C 100 OP37GZ OP37GS XIND OP37E, OP-37F (P) . 0 C to 70 C *Not for new design, obsolete, April 2002. OP37G (P, S, Z) . 40 C to +85 C Lead Temperature Range (Soldering, 60 sec) 300 C Junction Temperature 45 C to +150C 3 Package Type Unit JA JC 8-Lead Hermetic DIP (Z) 148 16 C/W 8-Lead Plastic DIP (P) 103 43 C/W 8-Lead SO (S) 158 43 C/W NOTES 1 For supply voltages less than 22 V, the absolute maximum input voltage is equal to the supply voltage. 2 The OP37s inputs are protected by back-to-back diodes. Current limiting resistors are not used in order to achieve low noise. If differential input voltage exceeds 0.7 V, the input Current should be limited to 25 mA. 3 is specified for worst case mounting conditions, i.e., is specified for device JA JA in socket for TO, CerDIP, P-DIP, and LCC packages is specified for device JA soldered to printed circuit board for SO package. 4 Absolute maximum ratings apply to both DICE and packaged parts, unless otherwise noted. CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily WARNING accumulate on the human body and test equipment and can discharge without detection. Although the OP37 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions ESD SENSITIVE DEVICE are recommended to avoid performance degradation or loss of functionality. 2 REV. B