INA241B4QDGSRQ1

Overview

The INA241B4QDGSRQ1 is a bidirectional current sense amplifier from Texas Instruments, designed for automotive applications with AEC-Q100 qualification. It operates within a common-mode voltage range of -5 V to 110 V and supports a supply voltage between 2.7 V and 20 V. The device features a fixed gain of 100 V/V, a 3dB bandwidth of 1.1 MHz, and a typical input offset voltage of 25 uV. It draws 2.5 mA of operating current and offers a CMRR of 120 dB. Packaged in a VSSOP-8 format, it functions reliably across temperatures from -40°C to +125°C.

Feature Summary

• Supports bidirectional current sensing with high common-mode voltage tolerance up to 110 V
• Provides precise amplification with a fixed gain of 100 V/V and low input offset voltage
• Ensures signal integrity through high common-mode rejection ratio and wide bandwidth
• Qualified for automotive environments meeting AEC-Q100 standards

Applications

• Automotive battery management systems
• Motor control circuits
• High-side current monitoring in vehicle power distribution

Procurement Notes

Verify the specific suffix QDGSRQ1 to confirm the VSSOP-8 package and reel packaging configuration. Ensure compatibility with AEC-Q100 requirements for your target automotive application. Cross-reference the datasheet for thermal performance under expected load conditions. Confirm that the 110 V common-mode range aligns with your system's voltage levels. Check for moisture sensitivity handling instructions during storage and assembly.

Selection Notes

Select this component when high-side or low-side bidirectional current measurement is required in automotive systems. The 100 V/V gain suits applications needing significant signal amplification for low-current detection. Consider the VSSOP-8 package for space-constrained PCB layouts. Evaluate the 1.1 MHz bandwidth against noise filtering needs. Compare input offset voltage specifications if ultra-high precision is critical for the specific sensing task.

Part Context

This part belongs to the INA241 family of current sense amplifiers, which are engineered for robust performance in harsh electrical environments. The B-grade variant indicates specific accuracy and offset voltage characteristics compared to other grades. The Q1 suffix denotes automotive qualification, ensuring reliability under varying temperature and voltage stresses typical in vehicle electronics.

FAQ

Is the INA241B4QDGSRQ1 suitable for high-side current sensing?

Yes, it supports both high-side and low-side bidirectional current sensing due to its wide common-mode voltage range.

What is the maximum common-mode voltage supported?

The device supports a common-mode voltage range from -5 V to 110 V.