INA148UA

Overview

The INA148UA is a precision unity-gain differential amplifier manufactured by Texas Instruments. It features a wide common-mode voltage range of ±200 V and operates on a single supply voltage from 2.7 V to 36 V. Key electrical specifications include a gain bandwidth product of 100 kHz, a slew rate of 1 V/µs, and a typical common-mode rejection ratio (CMRR) of 70 dB. The device draws a maximum operating supply current of 600 µA and provides an output current capability of 8 mA per channel. It is housed in an 8-SOIC package and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Provides high-precision differential amplification with a fixed unity gain configuration.
• Supports extremely wide common-mode input voltage ranges up to ±200 V.
• Operates efficiently on low-power single-supply voltages ranging from 2.7 V to 36 V.

Applications

• Industrial process control signal conditioning
• Medical equipment isolation interfaces
• High-voltage sensing applications

Procurement Notes

Verify the specific suffix 'UA' against the official datasheet to confirm the package type and temperature grade. Ensure the ordering part number matches the required tape-and-reel or tube packaging options available for this specific variant. Cross-reference the manufacturer's latest documentation to confirm compliance with current environmental standards such as RoHS directives before finalizing procurement orders.

Selection Notes

Select the INA148UA when designing circuits that require accurate differential measurement across high common-mode voltages without external resistors. Its fixed unity gain simplifies layout and reduces component count compared to resistor-based solutions. Consider its 100 kHz bandwidth and 600 µA supply current when evaluating performance requirements for low-frequency signal processing in industrial environments.

Part Context

The INA148 belongs to a family of precision differential amplifiers designed for robust signal conditioning. Unlike standard operational amplifiers, it integrates matched internal resistors to ensure precise gain accuracy. This specific model focuses on handling large common-mode signals while maintaining high CMRR, making it suitable for harsh industrial environments where noise immunity and wide dynamic range are critical.

Replacement Considerations

Consult the official datasheet for confirmed pin-compatible alternatives within the same family. Verify if other variants offer different packaging or extended temperature ratings suitable for your specific application constraints.