INA296A1IDGKR

Overview

The INA296A1IDGKR is a bidirectional current sense amplifier from Texas Instruments, housed in an 8-pin VSSOP package. It operates with a supply voltage between 2.7V and 20V and supports a common-mode input range of -5V to 110V. The device features a fixed gain of 10V/V, a small-signal bandwidth of 1.1MHz, and a slew rate of 8V/µs. Key electrical specifications include a maximum offset voltage of ±20µV, a maximum gain error of ±0.01%, and a typical CMRR of 166dB. It draws 2.5mA of quiescent current and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Supports bidirectional current sensing across a wide common-mode voltage range independent of the supply voltage.
• Delivers high precision through ultra-low offset voltage and minimal gain error drift over temperature.
• Provides fast transient response with a 1.1MHz bandwidth and 1µs settling time for rapid overcurrent detection.

Applications

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

Procurement Notes

Verify the specific suffix IDGKR corresponds to the VSSOP-8 package and tape-and-reel shipping configuration. Confirm that the A1 designation matches the required 10V/V gain setting for your circuit design. Ensure compatibility with the specified operating temperature range and supply voltage requirements before finalizing procurement.

Selection Notes

Select this component when high-side or low-side bidirectional measurement is required at voltages up to 110V. The 10V/V gain is suitable for applications requiring larger differential signals or lower resolution ADCs. Consider the 1.1MHz bandwidth for high-speed protection loops and the low bias current for minimizing shunt power loss in sensitive circuits.

Part Context

This part belongs to the INA296x family of ultra-precise current sense amplifiers. The 'A' variant denotes the highest accuracy tier with ±0.01% gain error and ±10µV offset. The '1' suffix indicates a fixed gain of 10V/V. The DGKR suffix specifies the 8-pin VSSOP package with reel packaging, distinguishing it from other package options like SOIC or SOT-23.

Replacement Considerations

INA296A2IDGKR: Offers 20V/V gain instead of 10V/V.

FAQ

How does the INA296A1 handle common-mode voltages exceeding its supply voltage?

The internal topology allows the common-mode range (-5V to 110V) to operate independently of the VS supply voltage (2.7V to 20V), enabling high-side sensing beyond the supply rail.

What is the output configuration for bidirectional operation?

For bidirectional mode, connect REF1 to the positive supply and REF2 to ground. This sets the output midpoint voltage to half the supply voltage when no current flows.