INA296B1QDDFRQ1

Overview

The INA296B1QDDFRQ1 is an AEC-Q100 qualified, bidirectional current sense amplifier with a gain of 10 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 ±0.1%, a typical CMRR of 130dB, and a small-signal bandwidth of 1.1MHz at all gains. The device features a slew rate of 8V/µs and draws a quiescent current of 2.5mA (typical). It is housed in an SOT-23-8 (DDF) package and functions within an ambient temperature range of –40°C to 125°C.

Feature Summary

• Bidirectional operation for high-side, low-side, or inline current sensing applications
• Wide common-mode input range extending from –5V to 110V independent of supply voltage
• High-speed signal processing with 1.1MHz bandwidth and 8V/µs slew rate
• Ultra-low input bias current that remains constant across the entire common-mode voltage range

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 automotive-grade B-version device in the DDF package. Confirm the gain setting is 10V/V as indicated by the '1' in the part number. Ensure the application environment stays within the specified –40°C to 125°C operating temperature range for Grade 1 qualification. Cross-reference the datasheet revision date to ensure compatibility with latest functional safety documentation.

Selection Notes

Select this component when a fixed 10V/V gain is required for high-current sensing with minimal shunt resistance. The B-version offers higher accuracy than standard industrial parts but lower precision than the A-version. Consider the 1.1MHz bandwidth for fast transient detection needs. Verify that the 110V common-mode limit meets the system's bus voltage requirements. The SOT-23-8 package is suitable for space-constrained PCB layouts.

Part Context

This device belongs to the INA296x-Q1 family of ultra-precise, bidirectional current sense amplifiers designed for automotive environments. It shares architectural similarities with other members like the INA296A-Q1 but differs in precision grades and gain options. The family supports multiple package types including SOIC-8, VSSOP-8, and VSSOP-10, allowing flexibility in thermal and spatial design constraints for various vehicle electronic modules.

Replacement Considerations

Direct substitutes within the same family include INA296B2QDDFRQ1 (20V/V), INA296B3QDDFRQ1 (50V/V), INA296B4QDDFRQ1 (100V/V), and INA296B5QDDFRQ1 (200V/V). For non-automotive applications, the INA296B1DDFR may be considered if AEC-Q100 qualification is not required. Ensure pinout compatibility remains identical across these variants.