INA126UA/2K5

Overview

The INA126UA/2K5 is a micropower instrumentation amplifier manufactured by Texas Instruments, featuring a single circuit in an 8-SOIC surface-mount package. It operates on a supply voltage range of 2.7 V to 36 V with a typical supply current of 175 µA. Key electrical specifications include a gain bandwidth product of 200 kHz, a slew rate of 0.4 V/µs, and an input bias current of 10 nA. The device offers a maximum input resistance of 1 GΩ and supports gains from 5 V/V to 10,000 V/V via a single external resistor. It functions within a temperature range of -40°C to 85°C.

Feature Summary

• Micropower consumption with 175 µA supply current for battery-operated applications
• High input impedance of 1 GΩ suitable for high-impedance signal sources
• Single-resistor gain setting capability for simplified circuit design
• Wide single-supply operation from 2.7 V to 36 V

Applications

• Battery-powered medical instrumentation
• Strain gauge and load cell interfaces
• Thermocouple amplification
• Photodiode preamplifiers

Procurement Notes

Verify the specific suffix 'U' indicates the SOIC package and '/2K5' denotes the tape and reel quantity of 2,000 units. Confirm the 'A' grade designation corresponds to the specified offset voltage and CMRR limits in the official datasheet. Ensure the ordering part number matches the required temperature range and packaging format for your assembly process.

Selection Notes

Select this component when low power consumption is critical alongside moderate precision requirements. The 8-SOIC package is suitable for standard surface-mount assembly. Compare input offset voltage and drift specifications against application needs, as the 'A' grade offers tighter tolerances than standard grades. Ensure the required gain can be achieved with the available external resistor options within the specified accuracy limits.

Part Context

This part belongs to the INA126 family of micropower instrumentation amplifiers from Texas Instruments. The family includes variants with different packages (e.g., DIP, SOIC) and grades (standard vs. A-grade). The INA126 series is designed for general-purpose precision applications requiring low power and high input impedance, serving as a cost-effective solution for sensor signal conditioning.

Replacement Considerations

INA126E/2K5: Different package (VSSOP-8) and potentially different electrical characteristics. INA126U: Standard grade version with looser specifications compared to the 'A' grade.