INA133U

Overview

The INA133U is a high-speed, precision difference amplifier manufactured by Texas Instruments. It provides a fixed gain of 0.1 V/V and features a bandwidth of 1.5 MHz with a slew rate of 4.50 V/μs. The device operates on a single supply voltage ranging from 4.5V to 36V, drawing a maximum supply current of 950 μA. Key electrical specifications include an input offset voltage of 450 µV, a common-mode rejection ratio (CMRR) of 80 dB, and an input bias current of 150 µV. It is housed in an 8-pin SOIC package and supports an operating temperature range from -40°C to 85°C.

Feature Summary

• Fixed internal gain of 0.1 V/V for precise signal attenuation
• High-speed performance with 1.5 MHz bandwidth
• Single-supply operation capability up to 36V
• Precision characteristics with low input offset voltage

Applications

• Signal conditioning in industrial process control systems
• Data acquisition front-ends requiring fixed attenuation
• Sensor interface circuits for differential signal processing

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest datasheet to ensure correct package type and temperature grade. Confirm RoHS compliance status and check for any recent lifecycle notifications or obsolescence warnings before finalizing procurement plans.

Selection Notes

Select this component when a fixed 0.1 V/V attenuation is required without external resistors. Consider its 1.5 MHz bandwidth for high-frequency applications. Evaluate the 950 μA supply current against power constraints and verify that the 80 dB CMRR meets system noise requirements.

Part Context

The INA133U belongs to the Burr-Brown heritage line of difference amplifiers now managed by Texas Instruments. This series is designed for applications needing accurate differential-to-single-ended conversion with minimal external component count, distinguishing it from programmable instrumentation amplifiers.

Replacement Considerations

INA2133UAE4 is a documented equivalent part within the same family offering identical functional specifications.