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LT1462

Linear Technology
Part Number LT1462
Manufacturer Linear Technology
Description Dual/Quad Micropower/ 260uW C-Load Picoampere Bias Current JFET Input Op Amps
Published Mar 22, 2005
Detailed Description LT1462/LT1463 Dual/Quad Micropower, 260µW C-Load Picoampere Bias Current JFET Input Op Amps FEATURES s DESCRIPTION The...
Datasheet PDF File LT1462 PDF File

LT1462
LT1462

Overview
LT1462/LT1463 Dual/Quad Micropower, 260µW C-Load Picoampere Bias Current JFET Input Op Amps FEATURES s DESCRIPTION The LT ®1462 (dual) and LT1463 (quad) are the first micropower op amps (45µA max per amp) to offer picoampere input bias currents (1pA typ) and unity gain stability for capacitive loads up to 10nF.
The output can swing a 10k load to within 1.
5V of either supply, just like op amps that require an order of magnitude more supply current.
This unique combination of performance makes the LT1462/LT1463 ideal over a wide range of input and output impedances.
In the design and testing of the LT1462/LT1463, particular emphasis has been placed on optimizing performance in the low cost SO-8 (dual) and 14-lead SO package (quad) for ± 15V and ± 5V supplies.
The input common mode range includes the positive rail.
Slew rate (0.
08V/µs min) and gain bandwidth product (125kHz min) are 100% tested.
A full set of matching specifications is also provided.
, LTC and LT are registered trademarks of Linear Technology Corporation.
C-Load is a trademark of Linear Technology Corporation.
s s s s s s s s Input Bias Current: 2pA Max (LT1462A) 20pA Max (LT1462, LT1463) Supply Current per Amplifier: 45µA Max Unity-Gain Stable for C-LoadTM Up to 10nF Input Common Mode Range Includes Positive Rail Guaranteed Specs with ± 5V, ± 15V Supplies Gain Bandwidth Product: 175kHz Typ Slew Rate: 0.
13V/µs Typ Guaranteed Matching Specifications Standard Pinout: SO-8, SO-14 Package U APPLICATIONS s s s s Battery-Powered Systems Photocurrent Amplifiers Low Frequency, Micropower Active Filters Low Droop Track-and-Hold Circuits TYPICAL APPLICATION Low Power Logging Amplifier R8 100k D1 1N4148 C1 1nF R5 24k C5 200pF 1 D3 1N4148 R6 100k 12 Q1 2N3904 C5 1µF R9 1M DC OUT C3 0.
47µF 7 C4 10µF 8 AC OUT R3 10k 5 + AMP 3 1/4 LT1463 R1 100Ω 5V 2 – + 4 6 – 1/4 LT1463 11 –5V R7 10M R10 50k 10 + 1/4 LT1463 3 9 – R11 1M PHOTODIODE R2 24k C2 200pF + 1/4 LT1463 14 13 – R4 10M D2 1N4148 R3 ...


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