INA148UAG4

Overview

The INA148UAG4 is a precision differential amplifier manufactured by Texas Instruments, designed for high-voltage signal processing applications. It features a fixed unity gain configuration with an input voltage range capable of handling common-mode voltages up to plus or minus 200 volts. The device operates on a single supply voltage ranging from 2.7 V to 36 V and delivers an output current of 8 mA per channel. Key electrical specifications include a gain error of 0.075 percent, a common-mode rejection ratio of 70 dB, and a bandwidth of 100 kHz. It is housed in an SOIC-8 surface-mount package.

Feature Summary

• Supports high common-mode voltage inputs up to plus or minus 200 V while maintaining accurate differential amplification.
• Provides precise signal conditioning with a fixed unity gain and low gain error for measurement accuracy.
• Operates reliably across an extended industrial temperature range suitable for harsh environments.

Applications

• Current sensing in high-side motor control systems
• Industrial process control signal isolation
• Battery management system monitoring

Procurement Notes

Verify the specific suffix AG4 against the manufacturer's official datasheet to confirm pinout compatibility and RoHS compliance status. Ensure the selected package variant matches the intended PCB footprint requirements. Cross-reference the part number with authorized distributors to confirm availability and authenticity before procurement.

Selection Notes

Select this component when application requirements demand high common-mode voltage tolerance combined with precision differential amplification. The fixed unity gain simplifies circuit design by eliminating external resistor networks. Consider the 36 V maximum supply limit and 8 mA output drive capability to ensure adequate performance margins for the target load conditions.

Part Context

The INA148 belongs to Texas Instruments' family of precision differential amplifiers engineered for robust signal conditioning in electrically noisy environments. This series addresses challenges associated with measuring signals superimposed on high common-mode potentials. The UAG4 designation indicates a specific tape-and-reel packaging option within the standard SOIC-8 form factor.

FAQ

What is the maximum common-mode voltage supported by the INA148UAG4?

The device supports a common-mode voltage range of plus or minus 200 V, allowing it to amplify small differential signals present on high-voltage lines.

Does the INA148UAG4 require external resistors for gain setting?

No, the INA148UAG4 has a fixed internal gain of 1 V/V, eliminating the need for external gain-setting resistors and reducing component count.