INA296B3QDDFRQ1

Overview

The INA296B3QDDFRQ1 is an AEC-Q100 qualified, bidirectional current sense amplifier with a gain of 50 V/V. It operates over a common-mode voltage range of -5V to 110V and supports supply voltages from 2.7V to 20V. The device features a 1.1MHz bandwidth, 8V/µs slew rate, and 1µs settling time. Electrical characteristics include a maximum gain error of ±0.1%, input offset voltage of ±150µV, and quiescent current of 2.5mA. It is housed in an SOT-23-8 (DDF) package.

Feature Summary

• Bidirectional operation for high-side, low-side, and inline current sensing
• Wide common-mode voltage range independent of supply voltage
• High-speed response with 1.1MHz bandwidth and fast settling time
• Ultra-low input bias current maintained across the entire common-mode range

Applications

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

Procurement Notes

Verify that the specific suffix QDDFRQ1 corresponds to the automotive-grade B version in the DDF package. Confirm the gain setting matches system requirements, as the '3' indicates a fixed 50 V/V gain. Ensure the design accounts for the specified operating temperature range and thermal resistance values for the SOT-23-8 package under expected load conditions.

Selection Notes

Select this component when bidirectional measurement is required within a wide common-mode voltage window up to 110V. The 50 V/V gain option balances output dynamic range with shunt resistor selection. Consider the B-version accuracy specifications if ultra-precision is not critical, noting the higher offset voltage compared to the A-version. Verify compatibility with the target PCB footprint for the SOT-23-8 package.

Part Context

This part belongs to the INA296x-Q1 family of ultra-precise current sense amplifiers designed for automotive applications. The family offers multiple gain options and package variants to suit different board space and precision requirements. The Q1 designation confirms compliance with AEC-Q100 standards for automotive reliability and temperature grades.

Replacement Considerations

INA296A3QDDFRQ1: Offers higher precision (±0.01% gain error) but may have different offset characteristics. Other INA296x-Q1 variants with different gains or packages require circuit re-evaluation. No direct pin-to-pin substitutes from other manufacturers are confirmed in public documentation.