INA327EA/250

Overview

The INA327EA/250 is a precision, low-drift CMOS instrumentation amplifier manufactured by Texas Instruments. It features a single channel with a fixed gain of 80 dB (40 V/V) and a 3dB bandwidth of 1 kHz. Key electrical specifications include an input bias current of 2 nA, an input offset voltage of 100 uV, and a common-mode rejection ratio of 100 dB. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V, consuming 2.4 mA of quiescent current. It is housed in a compact MSOP-10 surface-mount package and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Precision low-drift CMOS architecture designed for high accuracy applications
• Integrated shutdown capability for power management
• High common-mode rejection ratio for noise suppression
• Single-supply operation within a wide voltage range

Applications

• Precision sensor signal conditioning
• Medical instrumentation front-ends
• Industrial process control systems
• Data acquisition systems requiring low drift

Procurement Notes

Verify the specific suffix EA/250 against the manufacturer's latest datasheet to confirm pinout compatibility and packaging details. Ensure that the fixed gain configuration matches the system requirements, as external resistors are not used for gain adjustment in this variant. Confirm moisture sensitivity level handling procedures during assembly to prevent package damage.

Selection Notes

Select this component when a fixed gain of 80 dB is required alongside low input bias current and high CMRR. It is suitable for applications where space is limited due to the MSOP-10 package. Consider alternative models if programmable gain or higher bandwidth is needed, as this part is optimized for precision DC and low-frequency signals rather than high-speed transient response.

Part Context

This device belongs to the INA327 series of precision instrumentation amplifiers. It is characterized by its CMOS technology which enables low power consumption while maintaining high performance metrics such as low offset voltage and drift. The series is designed to replace older bipolar-based solutions in modern low-voltage, battery-powered electronic designs.

Replacement Considerations

Check for direct replacements within the INA326 or INA321 families if pinout compatibility is critical, though gain and bandwidth specifications differ. Verify that any substitute maintains the MSOP-10 footprint and meets the 2.7V to 5.5V supply voltage constraints.