INA296A4QDDFRQ1

Overview

The INA296A4QDDFRQ1 is an AEC-Q100 qualified, bidirectional current sense amplifier with a fixed gain of 100 V/V. It operates over a common-mode voltage range of -5V to 110V and supports supply voltages from 2.7V to 20V. Key electrical specifications include a maximum gain error of ±0.01%, input offset voltage of ±3µV, and a small-signal bandwidth of 1.1MHz at all gains. The device features a typical quiescent current of 2.5mA and operates within a temperature range of -40°C to 125°C.

Feature Summary

• Ultra-precise bidirectional measurement capability with high DC CMRR for accurate shunt resistor monitoring
• High-speed signal processing with 1.1MHz bandwidth and fast settling time suitable for transient detection
• Wide common-mode voltage operation independent of the low-voltage power supply rail

Applications

• DC/DC converter current monitoring
• Battery management systems (BMS)
• Fuel cell control units
• Smart junction boxes

Procurement Notes

Verify the specific suffix QDDFRQ1 corresponds to the SOT-23-8 package and reel packaging configuration. Confirm that the 'Q' designation ensures compliance with AEC-Q100 Grade 1 automotive reliability standards. Ensure the ordering part number matches the required 100V/V gain variant within the INA296A family.

Selection Notes

Select this component when a fixed 100V/V gain is required for high-side or low-side sensing applications. The wide common-mode range allows operation in systems exceeding the local supply voltage. Consider the 1.1MHz bandwidth for fast overcurrent protection loops and the low offset voltage for precision measurements using low-value shunts.

Part Context

This device belongs to the INA296x-Q1 family of ultra-precise current sense amplifiers designed for automotive environments. It shares architectural similarities with other members like the INA296A3QDDFRQ1 but differs in its fixed internal gain setting. The family is characterized by zero-drift topology and high common-mode rejection ratios.

Replacement Considerations

INA296A3QDDFRQ1 offers a different gain (50V/V) within the same package and qualification standard.

FAQ

Does the common-mode voltage range depend on the supply voltage?

No, the INA296A4QDDFRQ1 supports a common-mode range of -5V to 110V regardless of the VS supply voltage.

What is the maximum gain error specification?

The maximum gain error is ±0.01% at room temperature with a drift of ±1ppm/°C over the operating temperature range.