INA848IDR

Instrumentation, Op Amps, Buffer Amps Overview

The INA848IDR is a fixed-gain instrumentation amplifier with a gain of 2000 V/V. It features ultra-low noise of 1.5 nV/√Hz and high bandwidth of 2.8 MHz. The device operates on single supplies from 8 V to 36 V or dual supplies from ±4 V to ±18 V. Key electrical parameters include a maximum input offset voltage of 35 µV, minimum common-mode rejection ratio of 132 dB, and a slew rate of 45 V/µs. It is housed in an 8-pin SOIC package.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Super-beta topology provides low input bias current and low current noise for precision measurements.
• Integrated internal resistors ensure matched temperature drifts resulting in very low gain drift error.
• Current-feedback architecture delivers wide bandwidth at fixed gain without requiring subsequent stages.
• Accessible filter terminals allow insertion of filtering components between amplification stages.

Instrumentation, Op Amps, Buffer Amps Applications

• Surgical equipment
• Electrocardiogram (ECG)
• Ultrasound scanner
• Semiconductor test
• Data acquisition (DAQ)

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'IDR' corresponds to the tape-and-reel packaging format required for automated assembly. Confirm that the operating temperature range of -40°C to +125°C aligns with the environmental conditions of the target application. Ensure supply voltages remain within the specified 8 V to 36 V limits to prevent damage.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when a fixed gain of 2000 is sufficient, eliminating the need for external gain-setting resistors. Consider the super-beta input stage for applications demanding minimal bias current effects. Evaluate the 2.8 MHz bandwidth against signal frequencies to ensure adequate response time. Check if the accessible filter pins simplify noise reduction strategies compared to standard topologies.

Instrumentation, Op Amps, Buffer Amps Part Context

The INA848 belongs to Texas Instruments' family of precision instrumentation amplifiers designed for high-speed, low-noise applications. Unlike programmable gain variants, this model integrates the gain resistor internally to maximize accuracy and minimize drift. It serves as a front-end solution for converting small differential signals into usable levels for downstream processing.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

INA848ID: Tube-packaged version of the same functional device.

Instrumentation, Op Amps, Buffer Amps FAQ

How does the INA848 handle input overvoltage conditions?

The inputs are protected up to ±20 V. If exceeded, current flows through internal protection diodes; external series resistors should be used to limit current to 10 mA or less.

What is the purpose of the +FL and -FL pins?

These filter terminals provide access between the two amplification stages, allowing users to add RC or RLC filter networks to attenuate specific frequency bands.