INA293A2IDBVT

Overview

The INA293A2IDBVT is a unidirectional current sense amplifier from Texas Instruments, housed in a 5-pin SOT-23 package. It features a fixed gain of 50 V/V and supports a common-mode voltage range from -4 V to 110 V. The device offers a bandwidth of 1.3 MHz with a gain-bandwidth product of 900 kHz. Key electrical specifications include an input offset voltage of 15 µV, an input bias current of 20 µA, and a CMRR of 160 dB. It operates on a supply voltage between 2.7 V and 20 V, consuming 1.5 mA of quiescent current. The unit functions within a temperature range of -40°C to +125°C.

Feature Summary

• Provides high-precision current sensing with ultra-low offset voltage for accurate measurements.
• Supports wide common-mode voltage operation extending up to 110 V for high-side applications.
• Delivers fast transient response with a 1.3 MHz bandwidth and low settling time.

Applications

• High-side current monitoring in industrial power distribution systems
• Battery management systems requiring precise charge/discharge tracking
• Overcurrent protection circuits in motor control drives

Procurement Notes

Verify the specific suffix IDBVT indicates tape-and-reel packaging when ordering. Confirm the A2 grade designation matches the required offset voltage tolerance for your design. Ensure the SOT-23 thermal characteristics are sufficient for your application's power dissipation requirements. Cross-reference the datasheet revision date to ensure compatibility with your schematic symbols.

Selection Notes

Select this component when a fixed 50 V/V gain is appropriate for the expected shunt voltage drop. Consider the 1.3 MHz bandwidth if rapid fault detection is necessary. Evaluate the 15 µV offset voltage against the minimum measurable signal to ensure adequate resolution. Verify that the 110 V common-mode limit exceeds the maximum bus voltage in the target circuit.

Part Context

This part belongs to the INA293 family of ultra-precise current sense amplifiers designed for high-voltage environments. Unlike bidirectional variants, this model is optimized for unidirectional flow monitoring. It shares the compact SOT-23 footprint with other members but differs in gain configuration and specific offset performance grades defined by the suffix.

Replacement Considerations

The INA293A2IDBVR is the reel-compatible alternative offering identical electrical specifications. For automotive applications, verify if the Q1 graded variant meets qualification standards. Direct pin-to-pin replacements require matching the 50 V/V gain and 110 V common-mode range.