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OP497GS Datasheet(PDF) 1 Page - Analog Devices |
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OP497GS Datasheet(HTML) 1 Page - Analog Devices |
1 / 12 page REV. D Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a OP497 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2002 Precision Picoampere Input Current Quad Operational Amplifier FEATURES Low Offset Voltage: 50 V max Low Offset Voltage Drift: 0.5 V/ C max Very Low Bias Current 25 C: 100 pA max –55 C to +125 C: 450 pA max Very High Open-Loop Gain: 2000 V/mV min Low Supply Current (per Amplifier): 625 A max Operates from 2 V to 20 V Supplies High Common-Mode Rejection: 120 dB min APPLICATIONS Strain Gage and Bridge Amplifiers High Stability Thermocouple Amplifiers Instrumentation Amplifiers Photo-Current Monitors High Gain Linearity Amplifiers Long-Term Integrators/Filters Sample-and-Hold Amplifiers Peak Detectors Logarithmic Amplifiers Battery-Powered Systems GENERAL DESCRIPTION The OP497 is a quad op amp with precision performance in the space-saving, industry standard 16-lead SOlC package. Its com- bination of exceptional precision with low power and extremely low input bias current makes the quad OP497 useful in a wide variety of applications. Precision performance of the OP497 includes very low offset, under 50 µV, and low drift, below 0.5 µV/°C. Open-loop gain exceeds 2000 V/mV ensuring high linearity in every application. Errors due to common-mode signals are eliminated by the OP497’s common-mode rejection of over 120 dB. The OP497’s power supply rejection of over 120 dB minimizes offset voltage changes experienced in battery-powered systems. Supply current of the OP497 is under 625 µA per amplifier, and it can operate with supply voltages as low as ±2 V. The OP497 utilizes a superbeta input stage with bias current can- cellation to maintain picoamp bias currents at all temperatures. This is in contrast to FET input op amps whose bias currents start in the picoamp range at 25 °C, but double for every 10°C rise in temperature, to reach the nanoamp range above 85 °C. Input bias current of the OP497 is under 100 pA at 25 °C and is under 450 pA over the military temperature range. Combining precision, low power, and low bias current, the OP497 is ideal for a number of applications, including instru- mentation amplifiers, log amplifiers, photo-diode preamplifiers, and long-term integrators. For a single device, see the OP97; for a dual device, see the OP297. PIN CONNECTIONS 16-Lead Wide Body SOIC (S-Suffix) 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 – + NC = NO CONNECT OUT A –IN A +IN A V+ +IN B –IN B OUT B OUT D –IN D +IN D V– +IN C –IN C OUT C NC NC – + OP497 14-Lead Plastic Dip (P-Suffix) 14-Lead Ceramic Dip (Y-Suffix) 1 2 3 4 5 6 7 14 13 12 11 10 9 8 OUT A –IN A +IN A V+ +IN B –IN B OUT B OUT D –IN D +IN D V– +IN C –IN C OUT C – + – + OP497 VS = 15V VCM = 0V 1000 100 10 –75 –50 –25 0 25 50 75 100 125 TEMPERATURE – C –IB +IB IOS Input Bias, Offset Current vs. Temperature |
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