Dual/Quad Micropower, 1MHz C-Load Picoampere Bias Current JFET Input Op Amps

The LT1464 (dual) and LT1465 (quad) are the first micropower op amps (200µA max per amp) to offer picoampere input bias currents (500fA 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 LT1464/LT1465 ideal over a wide range of input and output impedances.

In the design and testing of the LT1464/LT1465, particular emphasis has been placed on optimizing performance in the low cost SO-8 (dual) and 14-lead SO (quad) package for ±15V and ±5V supplies. The input common mode range includes the positive rail. Slew rate (0.5V/µs min) and gain bandwidth product (650kHz min) are 100% tested. A full set of matching specifications is also provided.

Applications

* Battery-Powered Systems

* Photocurrent Amplifiers

* Low Frequency, Micropower Active Filters

* Low Droop Track-and-Hold Circuits

* Input Bias Current:

* 2pA Max (LT1464A)

* 20pA Max (LT1464, LT1465)

* Supply Current per Amplifier: 200µA Max

* Gain Bandwidth Product: 1MHz Typ

* Slew Rate: 0.9V/µs Typ

* Input Common Mode Range Includes Positive Rail

* Unity-Gain Stable for C-Load™ Up to 10nF

* Open-Loop Gain: 1 Million Typ

* Guaranteed Specs with ±5V, ±15V Supplies

* Guaranteed Matching Specifications

* Standard Pinout: SO-8, SO-14 Package