INA2137UA

Overview

The INA2137UA is a dual-channel audio differential line receiver manufactured by Texas Instruments. It integrates high-performance operational amplifiers with on-chip precision resistors to provide balanced-to-unbalanced conversion. The device operates within a supply voltage range of 4.5 V to 36 V and features a gain bandwidth product of 1 MHz. Key electrical specifications include a slew rate of 3.5 V/µs, input bias current of 100 pA, and an input voltage noise density of 45 nV/√Hz. It is housed in an 8-pin SOIC package and supports operation from -40°C to +85°C.

Feature Summary

• Integrates precision matched resistors for accurate differential signal processing
• Provides rail-to-rail output capability for maximum dynamic range
• Features low power consumption suitable for battery-operated systems
• Offers high common-mode rejection ratio for noise immunity

Applications

• Audio differential line receivers
• Balanced-to-unbalanced signal conversion
• Professional audio equipment interfaces

Procurement Notes

Verify the specific suffix (e.g., /2K5) against the required reel quantity and tape-and-reel specifications. Confirm RoHS compliance status as indicated in the official datasheet. Ensure the SOIC-8 package variant matches the PCB footprint requirements. Cross-reference the manufacturer part number with the distributor's catalog to avoid confusion with similar OPA series devices.

Selection Notes

Select this component when a dual-channel solution is required for audio line reception. Compare input offset voltage and noise density against application sensitivity requirements. Consider the 8-pin SOIC package constraints versus alternative packages like PDIP if through-hole mounting is necessary. Verify that the 1 MHz bandwidth meets the highest frequency components of the audio signal path.

Part Context

This device belongs to the MicroAmplifier series, designed for cost-effective FET-input applications. It serves as a specialized alternative to general-purpose op-amps by integrating external resistor networks internally. The INA2137UA is distinct from the single-channel INA137 and the higher-bandwidth OPA2137, offering a dedicated two-channel architecture for stereo or dual-line applications.

Replacement Considerations

Official substitutes include OPA2137UA and OPA2137UAE4. Verify pin compatibility and electrical parameter equivalence before substitution. Note that some alternatives may differ in package type or specific noise characteristics.