INA137UA

Overview

The INA137UA is a single-channel audio differential line receiver manufactured by Texas Instruments. It integrates high-performance operational amplifiers with on-chip precision resistors to function as a fully specified audio line receiver. The device operates within a supply voltage range of 4.5 V to 36 V and draws a typical operating current of 220 µA per channel. Key electrical characteristics include a gain bandwidth product of 1 MHz, a slew rate of 3.5 V/µs, an input offset voltage of 10 mV, and an input bias current of 100 pA. It provides a common-mode rejection ratio of 84 dB and an input voltage noise density of 45 nV/√Hz. The component delivers an output current of 60 mA per channel and is housed in an 8-pin SOIC package.

Feature Summary

• Integrates high-performance op amps with on-chip precision resistors for simplified circuit design
• Provides fixed gain options of ±6dB corresponding to gains of 1/2 or 2
• Features low distortion specifications suitable for high-fidelity audio applications

Applications

• Audio differential line receiving circuits
• Professional audio equipment signal processing
• High-fidelity audio interface designs

Procurement Notes

Verify the specific suffix 'UA' corresponds to the standard SOIC-8 package variant when sourcing. Confirm that the required gain configuration matches the internal resistor network limitations. Ensure supply voltage constraints align with the 4.5 V minimum and 36 V maximum ratings. Check for RoHS compliance status if environmental regulations apply to the final assembly. Validate pinout compatibility during PCB layout integration.

Selection Notes

Select this component when a dedicated differential receiver with integrated precision resistors is required to reduce external component count. It is appropriate for applications needing fixed attenuation or buffering gains without external feedback networks. Consider the 1 MHz bandwidth and 3.5 V/µs slew rate for audio frequency ranges. Evaluate the 84 dB CMRR for noise rejection requirements in balanced audio lines.

Part Context

The INA137UA belongs to the INA137 family of audio differential line receivers from Texas Instruments. This series includes dual-channel variants such as the INA2137. These devices are designed specifically for audio applications where precise differential-to-single-ended conversion is necessary. The integration of internal resistors distinguishes them from general-purpose difference amplifiers like the INA592.

Replacement Considerations

• INA2137UA (Dual-channel version)

FAQ

What are the available gain configurations for the INA137UA?

The INA137UA offers fixed gain options of ±6dB, which correspond to voltage gains of 1/2 or 2.

How does the INA137UA simplify circuit design compared to discrete solutions?

It integrates high-performance op amps with on-chip precision resistors, eliminating the need for external matched resistor networks typically required for differential amplification.