PGA855RGTR

Overview

The PGA855RGTR is a low-noise, wide-bandwidth programmable-gain instrumentation amplifier with fully differential outputs. It features eight pin-programmable binary gains ranging from 0.125 V/V to 16 V/V. The device offers a constant 10 MHz bandwidth and a 35 V/µs slew rate across all gain settings. Input overvoltage protection supports ±40 V beyond supplies. It operates on input stage supplies of 8 V to 36 V (single) or ±4 V to ±18 V (dual), and output stage supplies of 4.5 V to 36 V (single) or ±2.25 V to ±18 V (dual).

Feature Summary

• Fully differential outputs with independent power-supply pins for ADC input overdrive protection.
• Eight pin-programmable binary gain settings selectable via digital logic inputs.
• Integrated input overvoltage protection handling voltages up to ±40 V beyond supply rails.
• Output common-mode voltage control allows independent setting via the VOCM pin.

Applications

• Factory automation and control systems
• Analog input modules
• Data acquisition (DAQ) systems
• Test and measurement equipment
• Semiconductor test applications

Procurement Notes

Verify the specific package marking and date code against the manufacturer's latest datasheet revision history. Confirm that the ordering suffix matches the required reel quantity and tape specifications. Ensure the component meets RoHS compliance standards as defined in the official documentation before finalizing procurement orders.

Selection Notes

Select this component when driving high-resolution ADCs with sampling rates up to 1 MSPS without requiring an additional driver stage. The super-beta input transistors provide ultra-low bias current suitable for high-impedance sensors. Use the separate output supply pins to isolate the amplifier from downstream overdrive conditions.

Part Context

This part belongs to the PGA855 series of programmable-gain instrumentation amplifiers manufactured by Texas Instruments. It utilizes a 16-pin VQFN package measuring 3 mm by 3 mm. The device is designed for precision signal conditioning in industrial environments requiring wide dynamic range and high speed.

Replacement Considerations

The INA851 is a fully differential instrumentation amplifier with similar overvoltage protection but different gain architecture. The PGA849 is a single-ended output variant within the same family. Verify pin compatibility and gain configuration requirements before substituting.