INA241A4QDGSRQ1

Overview

The INA241A4QDGSRQ1 is an automotive-grade bidirectional current sense amplifier from Texas Instruments, designed for high-precision applications. It operates with a common-mode voltage range of -5 V to 100 V and supports a supply voltage between 2.7 V and 20 V. Key electrical parameters include a fixed gain of 100 V/V, a minimum common-mode rejection ratio (CMRR) of 150 dB, and a maximum input offset voltage of 10 µV. The device features a 3dB bandwidth of 1100 kHz, a maximum gain error of 0.01%, and a typical input bias current of 35 µA. It functions within a temperature range of -40°C to +125°C and is housed in a VSSOP-10 package.

Feature Summary

• Provides ultra-high precision measurement capabilities with enhanced PWM rejection for noisy environments.
• Supports bidirectional current sensing across a wide common-mode voltage range extending to negative values.
• Delivers exceptional accuracy through low input offset voltage and minimal gain error specifications.

Applications

• Automotive battery management systems requiring precise current monitoring
• Motor control circuits in electric vehicles and industrial automation
• High-side or low-side current sensing in power distribution units

Procurement Notes

Verify the specific suffix 'A4' confirms the 100 V/V gain variant during procurement. Ensure the 'Q1' designation aligns with AEC-Q100 automotive qualification requirements for your target application. Confirm the DGSR package type matches your PCB footprint constraints. Cross-reference the revision level with the latest datasheet to ensure compatibility with existing design implementations.

Selection Notes

Select this component when high accuracy is critical due to its 10 µV offset and 150 dB CMRR. The 100 V/V gain suits applications with small shunt voltages requiring significant amplification. Consider the 1100 kHz bandwidth for fast transient response needs. Evaluate the -5 V to 100 V common-mode range against system ground offsets. Compare against other INA241 variants if different gain factors or slightly relaxed precision are acceptable.

Part Context

This part belongs to the INA241x-Q1 family of ultra-precise current sense amplifiers. It shares functional similarities with the INA241B-Q1 but offers superior accuracy metrics. The series is characterized by enhanced PWM rejection and broad common-mode voltage support. It serves as a specialized solution for demanding automotive and industrial sensing tasks where standard amplifiers lack sufficient precision or noise immunity.

Replacement Considerations

The INA241A4QDRQ1 is a pin-compatible alternative in the same package. For upgraded functionality, consider the INA241B-Q1 series which offers similar performance with potential improvements. Verify that any substitute maintains the 100 V/V gain and AEC-Q100 qualification status.