INA851RGTT

Instrumentation, Op Amps, Buffer Amps Overview

The INA851RGTT is a precision, low-noise instrumentation amplifier with fully differential outputs, designed to drive high-performance analog-to-digital converters. It features an attenuating gain option (G=0.2) and integrated output clamping for ADC protection. The device operates on single supplies from 8 V to 36 V or dual supplies from ±4 V to ±18 V. Key electrical characteristics include a typical input offset voltage of 10 µV, maximum drift of 0.3 µV/°C, and quiescent current of 6 mA. Gain is programmable from 0.2 to 10,000 using external resistors. It provides wide bandwidths of 22 MHz at G=0.2 and 15 MHz at G=1, with common-mode rejection ratios up to 120 dB minimum.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Fully differential outputs optimized for driving differential-input ADCs
• Integrated output clamping circuitry protects downstream devices from overdrive damage
• Input overvoltage protection tolerates voltages up to ±40 V beyond supply rails
• Attenuating gain capability allows output stage gain setting to 0.2 or 1

Instrumentation, Op Amps, Buffer Amps Applications

• Analog input modules
• Electrocardiogram (ECG) systems
• Flow transmitters
• Oscilloscopes (DSO)
• Semiconductor test equipment

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'RGT' corresponds to the 16-pin VQFN package configuration. Confirm that the ordering part number matches the required tape-and-reel quantity specifications provided in the manufacturer's orderable addendum. Ensure compatibility with the intended PCB footprint dimensions of 3.00 mm by 3.00 mm.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when driving differential-input ADCs requiring high precision and low noise. The integrated clamping feature simplifies protection design compared to standard instrumentation amplifiers. Consider the attenuating gain option if signal levels exceed ADC input ranges. Verify thermal management requirements due to the small VQFN package size and junction-to-ambient thermal resistance characteristics.

Instrumentation, Op Amps, Buffer Amps Part Context

The INA851 is Texas Instruments' first high-precision instrumentation amplifier with fully differential outputs. It utilizes super-beta input transistors to achieve very low input bias current and current noise. The device is optimized for applications requiring high common-mode rejection and low offset drift across wide temperature ranges, specifically targeting data acquisition systems and medical instrumentation.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

The INA159 serves as a related product offering fixed attenuating gain for specific voltage conversion scenarios.