INA2137UA/2K5

Overview

The INA2137UA/2K5 is a precision, low-power instrumentation amplifier manufactured by Texas Instruments. It features an integrated gain of 10 V/V and utilizes a single 5V supply for operation. The device incorporates laser-trimmed precision resistors to ensure high accuracy and stability. Key electrical characteristics include a maximum input offset voltage of 25 µV and a maximum drift of 0.2 µV/°C. It offers a common-mode rejection ratio (CMRR) of 96 dB at a gain of 10. The unit operates within a supply voltage range of 2.7V to 36V and supports a wide common-mode voltage range from -0.1V to +VS-0.1V. It is housed in an 8-pin SOIC package.

Feature Summary

• Integrated Gain: Fixed gain of 10 V/V eliminates the need for external precision resistors.
• High Precision: Laser-trimmed architecture ensures low offset voltage and minimal drift over temperature.
• Wide Common-Mode Range: Supports full-scale differential input voltages up to ±400mV with extended common-mode capabilities.
• Low Power Consumption: Designed for efficient operation on single or dual supplies.

Applications

• Precision current sensing in industrial and automotive systems
• Medical equipment signal conditioning
• Data acquisition systems requiring high accuracy
• Battery management systems

Procurement Notes

Verify the exact part number suffix '/2K5' corresponds to the tape-and-reel packaging quantity specified by the manufacturer. Confirm that the operating environment matches the specified temperature range and voltage limits. Ensure compatibility with the target PCB footprint for the SOIC-8 package. Cross-reference the datasheet revision date to confirm pinout and electrical specifications have not changed.

Selection Notes

Select this component when a fixed gain of 10 is required for high-precision applications. It is suitable for designs needing low offset voltage and high CMRR without external resistor matching. Consider the supply voltage range and package size constraints. Compare against other instrumentation amplifiers if variable gain or higher bandwidth is necessary.

Part Context

The INA2137 belongs to Texas Instruments' family of precision instrumentation amplifiers. It is designed for applications demanding high accuracy and stability. The device integrates matched resistors internally, simplifying the design process compared to discrete solutions. It is commonly used in sensor interfaces where signal integrity is critical.

Replacement Considerations

Check for direct replacements such as the INA2137U (tube packaging) or other TI instrumentation amplifiers with similar gain and precision specs. Verify pin compatibility and electrical parameter equivalence before substitution.

FAQ

What is the fixed gain of the INA2137UA/2K5?

The INA2137UA/2K5 has a fixed internal gain of 10 V/V.

What is the maximum input offset voltage?

The maximum input offset voltage is 25 µV.

Does the device require external resistors for gain setting?

No, the gain is set internally by laser-trimmed resistors, so no external gain-setting resistors are needed.