INA296B4IDR

Overview

The INA296B4IDR is a bidirectional current sense amplifier from Texas Instruments featuring a fixed gain of 100 V/V. It operates with a common-mode voltage range of -5V to 110V and supports a supply voltage between 2.7V and 20V. The device offers 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 is housed in an SOIC-8 package.

Feature Summary

• Supports bidirectional current measurement across a wide common-mode voltage range independent of the supply voltage
• Provides high-speed transient detection capabilities through a 1.1MHz signal bandwidth and fast settling time
• Delivers precision measurements utilizing a zero-drift architecture for low offset voltage and drift

Applications

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

Procurement Notes

Verify the specific suffix 'IDR' corresponds to the SOIC-8 package and tape-and-reel delivery format as defined in the manufacturer's ordering information. Confirm that the B-version accuracy specifications meet the system requirements, noting the higher gain error compared to A-version devices. Ensure the operating temperature range of -40°C to +125°C aligns with the environmental conditions of the target application.

Selection Notes

Select this component when a fixed 100 V/V gain is required for high-side, inline, or low-side current sensing applications. The device is suitable for designs needing precise measurement over a wide common-mode range extending beyond the supply voltage. Consider the B-version specifications if the ±0.1% gain error and ±150µV offset voltage are acceptable for the intended dynamic range and noise performance.

Part Context

This part belongs to the INA296x family of ultra-precise, bidirectional current sense amplifiers. The series includes multiple gain options ranging from 10V/V to 200V/V and is available in various packages including SOT-23-8, VSSOP-8, and SOIC-8. The family is designed for high-voltage DC current measurements and fast overcurrent protection in industrial and automotive environments.

Replacement Considerations

INA296A4IDR: Offers superior accuracy with lower gain error and offset voltage but maintains the same 100 V/V gain and pinout.