INA155EA/2K5

Overview

The INA155EA/2K5 is a single-channel instrumentation amplifier manufactured by Texas Instruments, belonging to the INA155 series. It features rail-to-rail CMOS output and operates within a supply voltage range of 2.7 V to 5.5 V. Key electrical specifications include a 3dB bandwidth of 550 kHz, a slew rate of 6.5 V/us, and a common-mode rejection ratio (CMRR) of 78 dB. The device exhibits an input bias current of 50 pA and an input offset voltage of 1 mV. It consumes 1.7 mA of operating current and offers fixed gains of 10 V/V or 50 V/V with a gain error of 0.05%. The component is housed in an 8-pin VSSOP package and supports surface mount installation.

Feature Summary

• Rail-to-rail CMOS output capability for maximum dynamic range
• High input impedance with low input bias current
• Fixed precision gain options of 10 V/V or 50 V/V

Applications

• Precision signal conditioning for sensor interfaces
• Data acquisition systems requiring high CMRR
• Battery-powered instrumentation due to low power consumption

Procurement Notes

Verify the specific suffix 'EA/2K5' against the official Texas Instruments datasheet to confirm pinout, tape-and-reel quantity, and moisture sensitivity level. Ensure the ordering part number matches the required gain configuration and package variant. Cross-reference the manufacturer's latest documentation to validate RoHS compliance status and recommended operating conditions before procurement.

Selection Notes

Select this component when a single-channel instrumentation amplifier with rail-to-rail output is required. It is suitable for applications needing a 550 kHz bandwidth and low power consumption under 2.7 V to 5.5 V supplies. Consider the fixed gain options and VSSOP-8 package constraints during circuit design.

Part Context

This part belongs to the INA155 family of instrumentation amplifiers from Texas Instruments. The family is characterized by its CMOS architecture, offering high input impedance and low power consumption. The INA155 series is designed for general-purpose precision applications, providing stable performance across industrial temperature ranges.

Replacement Considerations

Consult the Texas Instruments replacement guide for direct pin-compatible alternatives within the INA155 series. Verify that any substitute maintains the same VSSOP-8 package, gain settings, and electrical characteristics such as CMRR and bandwidth.