INA821IDR

Instrumentation, Op Amps, Buffer Amps Overview

The INA821IDR is a single-channel precision instrumentation amplifier manufactured by Texas Instruments, housed in an SOIC-8 surface-mount package. It operates on a supply voltage range of 4.5 V to 36 V with a typical quiescent current of 600 uA. Key electrical specifications include a gain-bandwidth product of 4.7 MHz, a slew rate of 2 V/us, and a common-mode rejection ratio of 140 dB. The device features low input offset voltage (35 uV), low input bias current (2 nA), and an input voltage noise density of 7 nV/sqrt Hz.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• High common-mode rejection ratio for accurate differential signal amplification
• Low input bias current suitable for high-impedance sensor interfaces
• Wide single-supply operating voltage range for flexible power integration

Instrumentation, Op Amps, Buffer Amps Applications

• Precision data acquisition systems
• Medical instrumentation
• Industrial process control
• Strain gauge and bridge sensor conditioning

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix ID against the required package type and temperature rating. Confirm RoHS compliance status through official manufacturer documentation before finalizing procurement. Ensure the ordering part number matches the exact pinout and thermal characteristics required for the target PCB layout.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when high common-mode rejection and low noise are critical for small signal amplification. Consider the 4.7 MHz bandwidth and 140 dB CMRR for applications requiring precise measurement of low-level signals in noisy environments. Evaluate the SOIC-8 package constraints against available board space.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the INA821 series of instrumentation amplifiers from Texas Instruments. It is designed for general-purpose precision applications where high accuracy and stability are required. The device integrates internal gain-setting resistors to simplify circuit design compared to discrete solutions.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Consult official datasheets for direct pin-compatible alternatives within the same family or broader instrumentation amplifier portfolios. Verify that any substitute maintains equivalent CMRR, bandwidth, and supply voltage requirements.