INA848ID

Instrumentation, Op Amps, Buffer Amps Overview

The INA848ID is a fixed-gain instrumentation amplifier from Texas Instruments, housed in an 8-pin SOIC package. It features a fixed gain of 2000 V/V and a 3dB bandwidth of 2.8 MHz. Key electrical parameters include a maximum input offset voltage of 35 µV, a minimum common-mode rejection ratio (CMRR) of 132 dB, and a typical quiescent current of 6.2 mA. The device operates on single supplies from 8 V to 36 V or dual supplies from ±4 V to ±18 V, with a specified temperature range of -40°C to +125°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Utilizes super-beta topology for low input bias current and noise
• Integrates matched internal resistors for high CMRR and low gain drift
• Provides access to internal filter nodes between gain 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 ordering suffix 'ID' corresponds to the 8-pin SOIC package variant. Confirm that the fixed gain of 2000 V/V meets the system requirements without external feedback components. Ensure the supply voltage range aligns with the 8 V to 36 V single-supply or ±4 V to ±18 V dual-supply specifications.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when high precision is required for small, fast differential signals. The integrated gain eliminates external resistor mismatch issues. Consider the 2.8 MHz bandwidth and low noise floor for interfacing with high-resolution ADCs. Verify thermal management needs given the operating temperature range up to +125°C.

Instrumentation, Op Amps, Buffer Amps Part Context

The INA848 is part of Texas Instruments' instrumentation amplifier portfolio, designed for high-precision measurements. It replaces designs requiring external gain-setting resistors by integrating them internally. This integration ensures matched temperature drifts, resulting in superior gain accuracy and stability compared to discrete solutions.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

INA821: Higher bandwidth but different noise profile.

Instrumentation, Op Amps, Buffer Amps FAQ

How is the gain set in the INA848?

The gain is fixed at 2000 V/V using integrated internal resistors. No external gain-setting resistor is required.

What is the purpose of pins 2 and 3?

Pins 2 (-FL) and 3 (+FL) are filter terminals that allow access between the two amplification stages for adding external filtering networks.