INA2143U

Overview

The INA2143U is a dual high-speed precision difference amplifier manufactured by Texas Instruments. It features a fixed gain of either 10 V/V or 0.1 V/V, selected via external resistors. Key electrical specifications include a slew rate of 5 V/µs, a gain-bandwidth product of 150 kHz, and a common-mode rejection ratio (CMRR) of 86 dB. The device operates on a single supply voltage ranging from 4.5 V to 36 V, with a maximum input offset voltage of 0.5 mV. It is housed in a 14-SOIC surface-mount package.

Feature Summary

• Dual channel configuration providing two independent difference amplifiers in a single package
• High slew rate capability for fast signal processing applications
• Precision resistor network integration for accurate fixed-gain operation
• Wide common-mode voltage range supporting various system interfaces

Applications

• Optical network signal conditioning
• Differential signal conversion in data acquisition systems
• Industrial process control instrumentation
• Medical equipment signal processing

Procurement Notes

Verify the specific gain variant (G=10 or G=0.1) required for your design, as this is determined by external resistor selection rather than part number suffix. Confirm the 14-SOIC package dimensions match your PCB footprint. Ensure the operating temperature range meets your environmental requirements. Check for moisture sensitivity level compliance if reflow soldering is planned. Validate that the supply voltage range aligns with your power budget.

Selection Notes

Choose the INA2143U when dual differential amplification with high speed is needed. It is suitable for applications requiring precise common-mode rejection and wide bandwidth. Consider the external resistor tolerance for gain accuracy. Compare against single-channel alternatives if only one amplifier is needed. Evaluate power consumption against other low-power options if battery life is critical.

Part Context

The INA2143U belongs to Texas Instruments' family of high-speed precision difference amplifiers. It shares architectural similarities with the INA143 but offers dual channels. This series is designed for applications demanding high CMRR and fast transient response. The U suffix indicates the SOIC-14 package variant. It complements other instrumentation amplifiers in the portfolio for complex signal chain designs.

Replacement Considerations

The INA143 is a single-channel equivalent within the same family. Verify pin compatibility and gain settings when substituting. No direct pin-for-pin dual replacements are confirmed in public documentation.