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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fpga855″>View Datasheet
Texas Instrument PGA855 Programmable-Gain Instrumentation Amplifier is a high-bandwidth programmable gain instrumentation amplifier with fully differential outputs. The PGA855 has eight binary gain settings, from an attenuating gain of 0.125V/V to a maximum of 16V/V, using three digital gain selection pins. The output common-mode voltage can be independently set using the VOCM pin.
The Texas Instruments PGA855 architecture is optimized to drive inputs of high-resolution, precision analog-to-digital converters (ADCs) with sampling rates up to 1MSPS without needing an additional ADC driver. The output-stage power supplies (LVSS/LVDD) are decoupled from the input stage. The devices can be connected to the power supplies of the ADC to protect the ADC or a downstream device against overdrive damage.
The super-beta input transistors offer an impressively low input bias current, providing a very low input current noise density of 0.3pA/√Hz, making the PGA855 a versatile choice for virtually any sensor type. The low-noise current-feedback front-end architecture offers excellent gain flatness, even at high frequencies, making the PGA855 an excellent high-impedance sensor readout device. Integrated protection circuitry on the input pins handles overvoltages up to ±40V beyond the power-supply voltages.
