INA241A3QDGSRQ1

Overview

The INA241A3QDGSRQ1 is a bidirectional current sense amplifier from Texas Instruments, designed for automotive applications with AEC-Q100 qualification. It features a gain of 50 V/V and operates within a common-mode voltage range of -5 V to 100 V. Key electrical parameters include a maximum input offset voltage of 10 uV, an input bias current of 35 uA, and a typical CMRR of 150 dB. The device supports a supply voltage between 2.7 V and 20 V, draws 3.2 mA of operating current, and offers a 3dB bandwidth of 1100 kHz. It is housed in a VSSOP-10 package and functions reliably across temperatures from -40°C to +125°C.

Feature Summary

• Bidirectional sensing capability for accurate measurement of positive and negative currents
• High precision performance with low input offset voltage and high common-mode rejection ratio
• Automotive grade reliability certified under AEC-Q100 standards
• Wide common-mode voltage range supporting high-side monitoring in harsh environments

Applications

• Automotive battery management systems
• Motor control circuits
• Load switch monitoring
• General-purpose current sensing in vehicle electronics

Procurement Notes

Verify the specific suffix 'Q1' confirms AEC-Q100 automotive qualification and 'DGSR' indicates the VSSOP-10 tape-and-reel packaging. Ensure the design accounts for the specified common-mode voltage limits and supply requirements. Confirm that the gain setting matches the application needs, as this variant has a fixed internal gain. Cross-reference the manufacturer's latest datasheet for any updates on recommended operating conditions or thermal characteristics.

Selection Notes

Select this component when bidirectional current monitoring is required in automotive systems with high common-mode voltages up to 100 V. The fixed 50 V/V gain suits applications where moderate amplification is sufficient without external resistors. Consider the VSSOP-10 package for space-constrained PCB layouts. Evaluate the 10 uV offset voltage requirement against system accuracy needs. This part is suitable for replacing older generation sensors if pin compatibility and performance metrics align with the new specifications.

Part Context

This device belongs to the INA241A family of current sense amplifiers. The 'Q1' suffix denotes automotive qualification, while 'A3' specifies the gain and accuracy class. It complements other INA241 variants that may offer different gains or packages. The family is designed for robust performance in noisy automotive electrical environments, providing reliable signal conditioning for microcontrollers or ADCs.

Replacement Considerations

Check for direct substitutes like INA241A3DRQ1 (SOIC package) or INA241A3PWPRQ1 (TSSOP package) if pin-out compatibility allows. Verify that alternative parts maintain the same 50 V/V gain and AEC-Q100 status. Ensure the replacement supports the same -5 V to 100 V common-mode range.