Datasheet OP497 (Analog Devices)

Precision Picoampere Input Current Quad Operational Amplifier OP497 FEATURES PIN CONNECTIONS Low offset voltage: 75 μV maximum OUT A 1 16 OUT D Low offset voltage drift: 1.0 μV/°C maximum –IN A 2 15 –IN D Very low bias current +IN A 3 14 +IN D 25°C: 150 pA maximum V+ 4 OP497 13 V– −40°C to +85°C: 300 pA maximum +IN B 5 12 +IN C Very high open-loop gain: 2000 V/mV minimum –IN B 6 11 –IN C Low supply current (per amplifier): 625 μA maximum OUT B 7 10 OUT C Operates from ±2 V to ±20 V supplies NC 8 9 NC
01 0 9-
High common-mode rejection: 114 dB minimum NC = NO CONNECT
30 00 Figure 1. 16-Lead Wide Body SOIC (RW-16)
APPLICATIONS OUT A 1 14 OUT D Strain gage and bridge amplifiers –IN A 2 13 –IN D High stability thermocouple amplifiers +IN A 3 12 +IN D Instrumentation amplifiers V+ 4 OP497 11 V– Photocurrent monitors +IN B 5 10 +IN C High gain linearity amplifiers –IN B 6 9 –IN C
2
Long-term integrators/filters
00
OUT B 7 8 OUT C
9- 30
Sample-and-hold amplifiers
00 Figure 2. 14-Lead PDIP (N-14)
Peak detectors 1k Logarithmic amplifiers VS = ±15V Battery-powered systems VCM = 0V GENERAL DESCRIPTION A)
The OP497 is a quad op amp with precision performance in
(p NT
the space-saving, industry standard 16-lead SOlC package.
E 100
Its combination of exceptional precision with low power and
CURR
extremely low input bias current makes the quad OP497 useful
UT –IB
in a wide variety of applications.
INP +IB
Precision performance of the OP497 includes very low offset (<50 μV) and low drift (<0.5 μV/°C). Open-loop gain exceeds
IOS
2000 V/mV ensuring high linearity in every application. Errors
10
3
–75 –50 –25 0 25 50 75 100 125
-00 due to common-mode signals are eliminated by its common- 09
TEMPERATURE (°C)
03 0 mode rejection of >120 dB. The OP497 has a power supply Figure 3. Input Bias, Offset Current vs. Temperature rejection of >120 dB which minimizes offset voltage changes Combining precision, low power, and low bias current, the OP497 experienced in battery-powered systems. The supply current is ideal for a number of applications, including instrumentation of the OP497 is <625 μA per amplifier, and it can operate with amplifiers, log amplifiers, photodiode preamplifiers, and long- supply voltages as low as ±2 V. term integrators. For a single device, see the OP97 data sheet, The OP497 uses a superbeta input stage with bias current and for a dual device, see the OP297 data sheet. cancellation 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. The input bias current of the OP497 is <100 pA at 25°C.
Rev. E 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©1991–2009 Analog Devices, Inc. All rights reserved.
Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION PIN CONNECTIONS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS APPLICATIONS INFORMATION AC PERFORMANCE GUARDING AND SHIELDING OPEN-LOOP GAIN LINEARITY APPLICATIONS CIRCUIT PRECISION ABSOLUTE VALUE AMPLIFIER PRECISION CURRENT PUMP PRECISION POSITIVE PEAK DETECTOR SIMPLE BRIDGE CONDITIONING AMPLIFIER NONLINEAR CIRCUITS OUTLINE DIMENSIONS ORDERING GUIDE