INA241B3QDGSRQ1

Overview

The INA241B3QDGSRQ1 is a bidirectional current sense amplifier from the Texas Instruments INA241B series, designed for automotive applications with AEC-Q100 qualification. It features a gain of 50 V/V and supports a common-mode voltage range from -5 V to 100 V. Key electrical parameters include a maximum input offset voltage of 150 uV, an input bias current of 35 uA, and a typical CMRR of 150 dB. The device operates on a supply voltage between 2.7 V and 20 V, drawing 3.2 mA of quiescent current. It offers a 3dB bandwidth of 1100 kHz and maintains a gain error of 0.1%. The component functions within a temperature range of -40°C to +125°C and is housed in a VSSOP-10 package.

Feature Summary

• Bidirectional sensing capability for accurate measurement of current flow in both directions across the shunt resistor.
• High common-mode rejection ratio ensures precise signal amplification even in high-noise environments with large common-mode voltages.
• Automotive-grade reliability certified under AEC-Q100 standards for operation in demanding vehicle electronic systems.

Applications

• Automotive battery management systems
• Motor control circuits
• High-side or low-side current monitoring

Procurement Notes

Verify the complete part number including suffixes such as DGSRQ1 to ensure correct packaging and automotive grade specification. Confirm that the supplier provides documentation proving AEC-Q100 compliance. Check for RoHS compliance status as indicated in official specifications. Ensure the source is an authorized distributor to guarantee authenticity and traceability for automotive safety requirements.

Selection Notes

Select this component when bidirectional current measurement is required in automotive environments with 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 150 uV max offset voltage for precision needs. Compare against other INA241 variants if different gain factors or tighter offset specifications are necessary for the specific circuit design.

Part Context

This device belongs to the INA241 family of current sense amplifiers, specifically the B-series variant which offers a balance of performance and cost. The Q1 suffix denotes automotive qualification, while DGSR indicates the VSSOP-10 tape and reel packaging. It complements other TI automotive analog products by providing robust sensing capabilities for power management and motor drive applications in modern vehicles.

Replacement Considerations

INA241B2QDGKRQ1 offers similar functionality but with a different gain and package type. INA241A3QDGSRQ1 provides higher precision with lower offset voltage. Verify pin compatibility and gain requirements before substituting.