INA296B4QDGSRQ1

Overview

The INA296B4QDGSRQ1 is a bidirectional current sense amplifier from Texas Instruments, designed for high-precision measurements in automotive and industrial applications. It operates with a common-mode voltage range of -5 V to 110 V, independent of supply voltage. The device features a fixed gain of 100 V/V and a bandwidth of 1.1 MHz. Key electrical specifications include an input offset voltage of 3 µV, a CMRR of 150 dB, and a gain error of 0.003%. It functions on a single supply voltage between 2.7 V and 20 V, consuming 2.5 mA of quiescent current. The component is AEC-Q100 qualified and housed in an 8-pin VSSOP package.

Feature Summary

• Supports bidirectional current sensing within a wide -5 V to 110 V common-mode voltage range
• Delivers ultra-high precision with low input offset voltage and minimal gain error
• Provides fast transient response with a 1.1 MHz signal bandwidth and rapid settling time
• Meets AEC-Q100 automotive qualification standards for reliability

Applications

• Automotive battery management systems
• High-side current monitoring in electric vehicles
• Overcurrent protection circuits requiring fast response
• Industrial motor control and power distribution units

Procurement Notes

Verify the specific suffix QDGSRQ1 corresponds to the VSSOP-8 package and tape-and-reel orientation. Confirm AEC-Q100 certification status matches the intended automotive application requirements. Check datasheet revisions for any updates to electrical characteristics or recommended operating conditions before finalizing procurement specifications.

Selection Notes

Select this component when high accuracy is critical alongside wide common-mode voltage operation. The 100 V/V gain suits applications where small differential voltages across shunt resistors must be amplified significantly. Ensure the system design accommodates the 1.1 MHz bandwidth to prevent aliasing or noise interference. Compare against other gain variants if output swing limitations exist within the target supply voltage range.

Part Context

This part belongs to the INA296x-Q1 family of ultra-precise, bidirectional current-sense amplifiers. It shares core architectural features with other members like the INA296A4QDGSRQ1 but differs in precision grades. The B-grade variant offers slightly higher gain error compared to the A-grade while maintaining similar speed and voltage capabilities. It complements the broader portfolio of TI's automotive-grade analog signal chain products.

Replacement Considerations

Direct substitutes include other INA296x-Q1 variants with different gains or precision grades, such as INA296A4QDGSRQ1. Cross-family replacements may require redesign due to differences in pinout, gain accuracy, or common-mode voltage limits.