INA296B2QDDFRQ1

Overview

The INA296B2QDDFRQ1 is an AEC-Q100 qualified, bidirectional current sense amplifier with a gain of 20 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 130dB typical CMRR. Gain error is ±0.1% with ±5ppm/°C drift. Input offset voltage is ±150µV max. It draws 2.5mA quiescent current and is housed in an SOT-23-8 package.

Feature Summary

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

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 automotive grade requirements. Confirm functional safety documentation availability if required for system design. Ensure operating temperature range matches Grade 1 specifications (-40°C to 125°C) or Grade 0 if applicable.

Selection Notes

Select this part for applications requiring bidirectional current measurement with a fixed 20 V/V gain. It is suitable for systems needing high common-mode rejection and fast transient detection. Compare against Version A devices if tighter accuracy specifications are necessary, as Version B offers lower cost with slightly higher offset and gain error.

Part Context

This component belongs to the INA296x-Q1 family of ultra-precise current sense amplifiers. It shares architectural similarities with other members like the INA296A2QDDFRQ1 but differs in precision specifications. The family is designed for automotive environments, offering robust performance across wide voltage ranges and temperatures.

Replacement Considerations

INA296A2QDDFRQ1 offers higher precision with ±0.01% gain error and ±10µV offset voltage. Other gain options within the same package include INA296B1QDDFRQ1 (10V/V), INA296B3QDDFRQ1 (50V/V), INA296B4QDDFRQ1 (100V/V), and INA296B5QDDFRQ1 (200V/V).

FAQ

What is the maximum survival voltage for the INA296B2QDDFRQ1?

The device supports a survival voltage range of -20V to 120V.

How does the input bias current behave across the common-mode range?

The input bias current remains constant at approximately 35µA across the entire common-mode voltage range from -5V to 110V.