INA293B3IDBVT

Overview

The INA293B3IDBVT is a unidirectional current sense amplifier from Texas Instruments, housed in a SOT-23-5 package. It operates with a supply voltage range of 2.7 V to 20 V and supports common-mode voltages from -4 V to 110 V. The device features a fixed gain of 100 V/V, a 3-dB bandwidth of 1 MHz, and a typical CMRR of 160 dB. Key electrical parameters include an input offset voltage of 10 µV, input bias current of 20 µA, and quiescent current of 1.5 mA. It functions within a temperature range of -40°C to +125°C.

Feature Summary

• Provides high-precision current measurement with ultra-low offset voltage and drift characteristics for accurate sensing.
• Supports high common-mode voltages up to 110 V, enabling safe monitoring in high-side configurations.
• Features a wide bandwidth of 1 MHz to handle fast transient signals without significant phase lag.
• Delivers exceptional common-mode rejection ratio to minimize noise interference in noisy environments.

Applications

• Industrial motor control systems requiring precise current feedback
• Power supply output monitoring and protection circuits
• Battery management systems in portable and stationary applications

Procurement Notes

Verify the specific suffix IDBVT indicates tape-and-reel packaging when ordering. Confirm the B3 grade corresponds to the required 10 µV offset voltage specification for your application accuracy needs. Ensure the SOT-23-5 footprint matches your PCB layout constraints. Check for automotive qualification requirements if deploying in vehicle environments, as standard grades differ from Q1 variants.

Selection Notes

Select this component when high-side current sensing is required with a fixed gain of 100 V/V. It is suitable for applications demanding low offset voltage and high common-mode rejection. Consider the SOT-23-5 package size for space-constrained designs. Compare against other INA293 variants if different gain factors or automotive qualifications are necessary.

Part Context

This part belongs to the INA293 family of ultra-precise current sense amplifiers designed for high-voltage applications. It shares architectural similarities with the INA281 but offers higher precision. The device complements Texas Instruments' portfolio of analog signal chain components for power management and industrial automation.

Replacement Considerations

Direct replacements include other INA293 variants with matching gain and package, such as INA293A3IDBVT or INA293B3IDBVR. Verify pin compatibility and electrical specifications before substitution.