INA296A3IDR

Overview

The INA296A3IDR is a bidirectional, ultra-precise current sense amplifier from Texas Instruments. It measures voltage drops across shunt resistors over a wide common-mode range of -5V to 110V, independent of the supply voltage. The device features a fixed gain of 50V/V, a small signal bandwidth of 1.1MHz, and a slew rate of 8V/µs. It operates on a single supply from 2.7V to 20V with a quiescent current of 2.5mA. Key accuracy specifications include a maximum gain error of ±0.01% and an input offset voltage of ±3µV. It is housed in an 8-pin SOIC package.

Feature Summary

• Ultra-precise zero-drift architecture ensures high measurement accuracy with low offset voltage and minimal drift across temperature ranges.
• Wide common-mode voltage range supports operation from -5V to 110V, enabling flexible high-side, low-side, and inline sensing configurations.
• High-speed performance with 1.1MHz bandwidth and fast settling time facilitates rapid transient detection and overcurrent protection.
• Bidirectional operation allows for accurate measurement of both positive and negative current flows through the sense resistor.

Applications

• 48V DC/DC Converters
• 48V Battery Management Systems (BMS)
• Test & Measurement Equipment
• Macro Remote Radio Units (RRU)
• 48V Rack Server Power Supplies

Procurement Notes

Verify the specific ordering suffix 'IDR' corresponds to the SOIC-8 package and tape-and-reel shipping configuration as defined in the manufacturer's package option addendum. Confirm that the A3 variant matches the required 50V/V gain for your circuit design. Ensure compatibility with the specified operating temperature range of -40°C to +125°C for your application environment.

Selection Notes

Select this component when precise bidirectional current monitoring is required in systems with common-mode voltages up to 110V. The 50V/V gain is suitable for applications requiring moderate amplification of small differential signals. Consider the 1.1MHz bandwidth for fast response needs. Compare against other gains in the INA296x family if different output dynamic ranges or noise performance levels are preferred.

Part Context

The INA296A3IDR belongs to the INA296x series of ultra-precise current sense amplifiers. This series is designed for high-voltage, bidirectional DC current measurements and high-speed applications. The 'A' designation indicates the ultra-precision version with tighter tolerance specifications compared to the 'B' version. The '3' suffix denotes the fixed 50V/V gain option within the product line.

Replacement Considerations

Direct substitutes within the same family include INA296A1IDR (10V/V), INA296A2IDR (20V/V), INA296A4IDR (100V/V), and INA296A5IDR (200V/V). These parts share identical pinouts and electrical characteristics except for the fixed internal gain. Verify that the alternative gain meets the system's output voltage swing requirements.