INA296B3IDDFR

Overview

The INA296B3IDDFR is a bidirectional current sense amplifier from Texas Instruments featuring a fixed gain of 50 V/V. It operates with a common-mode voltage range from -5V to 110V and supports a supply voltage between 2.7V and 20V. The device provides a small signal bandwidth of 1.1MHz, a slew rate of 8V/µs, and a step response settling time of 1µs to 1%. Key electrical characteristics include a maximum gain error of ±0.1%, an input offset voltage of ±150µV, and a typical CMRR of 130dB. It draws 2.5mA of quiescent current and functions within an ambient temperature range of -40°C to +125°C.

Feature Summary

• Supports bidirectional operation with a wide common-mode voltage range extending from -5V to 110V.
• Delivers high-speed performance with a 1.1MHz bandwidth and 8V/µs slew rate for rapid transient detection.
• Maintains ultra-precision accuracy with a maximum gain error of ±0.1% and low input offset voltage.
• Features independent supply operation allowing the common-mode range to exceed the power-supply voltage.

Applications

• 48V DC/DC Converter
• 48V battery management systems (BMS)
• Test & Measurement
• Macro remote radio unit (RRU)
• 48V rack server

Procurement Notes

Verify the specific suffix IDDFR corresponds to the SOT-23-8 package and tape-and-reel delivery format as documented in the manufacturer's ordering information. Confirm that the B3 designation aligns with the required 50 V/V gain setting for your circuit design. Ensure compatibility with AEC-Q100 standards if automotive qualification is necessary for the target application environment.

Selection Notes

Select this component when a fixed 50 V/V gain is optimal for the shunt resistor value and output dynamic range requirements. Consider the 1.1MHz bandwidth for applications requiring fast overcurrent protection or transient detection. Evaluate the ±0.1% gain error specification against system accuracy needs. Verify that the -5V to 110V common-mode range covers the bus voltage levels present in the high-side or low-side sensing configuration.

Part Context

This device belongs to the INA296x family of ultra-precise, bidirectional current sense amplifiers designed for high-voltage applications. The family offers multiple gain options ranging from 10 V/V to 200 V/V to accommodate various system architectures. The INA296x series is characterized by its zero-drift topology, which ensures stable performance across wide temperature ranges and varying common-mode voltages.

Replacement Considerations

INA296A3IDDFR: Offers higher precision with ±0.01% gain error and ±10µV offset voltage compared to the B3 version.