INA2322EA/250

Overview

The INA2322EA/250 is a dual-channel, low-cost, micropower CMOS instrumentation amplifier manufactured by Texas Instruments. It operates on a single supply voltage ranging from +2.7V to +5.5V and supports bipolar supply operation. The device features a shutdown mode with quiescent current below 1µA per channel. Key electrical specifications include a bandwidth of 500kHz at a gain of 5V/V, a slew rate of 0.4V/µs, and an input bias current of 10pA. Gain accuracy is specified at 0.07% for G=5, with a temperature coefficient of 2ppm/°C. The common-mode rejection ratio (CMRR) is 60dB over the full temperature range. The output stage provides rail-to-rail swing for gains greater than or equal to 10.

Feature Summary

• Dual-channel configuration in a TSSOP-14 package
• Micropower consumption with active shutdown capability
• High precision gain accuracy with external resistor programming
• Rail-to-rail output swing for high gain settings

Applications

• Industrial sensor amplifiers including bridge, RTD, and thermistor circuits
• Physiological signal amplification such as ECG, EEG, and EMG
• Signal conditioning for A/D converters
• Field utility meters and PCMCIA cards
• Automotive instrumentation systems

Procurement Notes

Verify that the specific part number matches the required package type and quantity. The /250 suffix indicates availability in tape and reel packaging containing 250 units. Confirm that the ordering suffix aligns with the desired transport media and unit count before finalizing procurement orders.

Selection Notes

Select this component when a dual-channel instrumentation amplifier is required for low-power applications. Ensure the design accommodates the specified supply voltage range and temperature extremes. Consider the external gain setting resistors for precise gain control and verify that the load requirements are met by the rail-to-rail output capability.

Part Context

This device belongs to the INA322 family of micropower, single-supply CMOS instrumentation amplifiers. It shares architectural similarities with the single-channel INA322 but integrates two independent amplifier channels within a single TSSOP-14 package. The family is designed for cost-sensitive applications requiring high precision and low power consumption.

Replacement Considerations

The single-channel equivalent is the INA322EA/250. For dual-channel replacements, consider other TI instrumentation amplifiers if pin compatibility is not required. Verify that any substitute meets the same supply voltage, temperature range, and performance specifications.