INA296B4IDGKR

Overview

The INA296B4IDGKR 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 a supply voltage range of 2.7V to 20V. The device offers a small signal bandwidth of 1.1MHz at all gains, a slew rate of 8V/µs, and a step response settling time to 1% of 1µs. 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 8-pin VSSOP package.

Feature Summary

• Supports bidirectional operation with a wide common-mode voltage range extending from -5V to 110V.
• Provides high-speed performance with a 1.1MHz bandwidth and fast settling time for transient detection.
• Delivers precision measurement capabilities with low gain error and offset voltage specifications.

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 'DGKR' corresponds to the VSSOP-8 package and reel packaging configuration as defined in the manufacturer's orderable information. Confirm that the 'B' version meets the required accuracy thresholds, specifically the ±0.1% gain error and ±150µV offset voltage limits, rather than the higher precision 'A' version specifications.

Selection Notes

Select this component when a fixed 100 V/V gain is required for high-side or low-side current sensing applications. Ensure the system design accommodates the specified common-mode voltage range up to 110V. Consider the 2.5mA supply current and thermal dissipation characteristics within the VSSOP-8 package constraints for the target operating temperature range.

Part Context

This part belongs to the INA296x family of ultra-precise current sense amplifiers designed for high-voltage, bidirectional DC current measurements. The family includes variants with different gain options ranging from 10V/V to 200V/V and accuracy grades A and B. The INA296B4IDGKR specifically utilizes the B-grade silicon with a 100V/V gain setting.

Replacement Considerations

INA296B4IDGKT

FAQ

How does the output voltage relate to the reference pins?

The output voltage is set by applying voltages to REF1 and REF2. For bidirectional operation, connecting one reference to VS and the other to GND sets the output to mid-supply when the differential input is zero.

What is the maximum survival voltage for the common-mode input?

While the operational common-mode voltage range is -5V to 110V, the device can survive transient voltages from -20V to 120V.