INA296A4IDGKR

Overview

The INA296A4IDGKR 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 typical CMRR of 166dB. Key electrical characteristics include a maximum gain error of ±0.01% and an input offset voltage of ±3µV. It is housed in an 8-pin VSSOP package.

Feature Summary

• Supports bidirectional current sensing across a wide common-mode voltage range independent of the supply voltage.
• Provides high-speed transient detection capabilities through a 1.1MHz bandwidth and fast settling time.
• Delivers ultra-precise measurements with low offset voltage and minimal gain drift over temperature.
• Features configurable output referencing via dedicated REF1 and REF2 pins for flexible system integration.

Applications

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

Procurement Notes

Verify the specific suffix IDGKR corresponds to the VSSOP-8 package variant when sourcing. Confirm that the 'A' designation aligns with the required ultra-precision specifications, specifically the ±0.01% gain error limit. Ensure the application environment remains within the specified operating temperature range of -40°C to +125°C for guaranteed performance metrics.

Selection Notes

Select this component when a fixed 100 V/V gain is optimal for the shunt resistor value and desired output dynamic range. The high common-mode rejection ratio makes it suitable for noisy environments with significant common-mode noise. Consider the 1.1MHz bandwidth if rapid overcurrent protection or transient detection is required by the system design.

Part Context

This part belongs to the INA296A family of ultra-precise current sense amplifiers. The 'A' suffix denotes the version with tighter accuracy specifications compared to the 'B' variant. The '4' indicates the fixed internal gain of 100 V/V. The 'DGKR' suffix specifies the 8-pin VSSOP package type and reel packaging configuration.

Replacement Considerations

INA296A5IDGKR: Offers 200 V/V gain instead of 100 V/V.

FAQ

How does the INA296A4IDGKR handle bidirectional current flow?

It measures differential voltage across the shunt resistor in both directions. The output voltage swings above or below the reference midpoint set by the REF1 and REF2 pins depending on the current direction.

What is the maximum common-mode voltage supported?

The device supports a common-mode voltage range from -5V to 110V, which is independent of the supply voltage applied to the VS pin.