INA241B5QDGSRQ1

Overview

The INA241B5QDGSRQ1 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 100 V and supports a supply voltage between 2.7 V and 20 V. The device features a fixed gain of 200 V/V, a 3dB bandwidth of 1100 kHz, and a typical CMRR of 150 dB. Key electrical parameters include an input offset voltage of 150 uV, input bias current of 35 uA, and a gain error of 0.1%. It consumes 3.2 mA of operating current and functions reliably across temperatures from -40°C to +125°C in a VSSOP-10 package.

Feature Summary

• Supports bidirectional current sensing with high common-mode voltage tolerance up to 100 V
• Provides high precision measurement through a fixed gain of 200 V/V and low input offset voltage
• Ensures signal integrity in noisy environments with a typical CMRR of 150 dB
• Qualified for automotive use under AEC-Q100 standards for extended temperature operation

Applications

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

Procurement Notes

Verify the specific suffix 'B5' indicates the fixed 200 V/V gain configuration when ordering. Confirm that the 'Q1' suffix denotes AEC-Q100 automotive qualification. Ensure the VSSOP-10 package matches the PCB footprint requirements. Check datasheet specifications for thermal dissipation limits given the 3.2 mA quiescent current. Validate compatibility with system common-mode voltage ranges before integration.

Selection Notes

Select this component when a high-gain output is required to interface directly with ADCs without additional amplification stages. The 200 V/V gain makes it suitable for detecting small voltage drops across shunt resistors. Consider the 150 dB CMRR for applications with significant common-mode noise. The bidirectional capability allows for measuring both charge and discharge currents in battery applications.

Part Context

This part belongs to the INA241B family of current sense amplifiers. The 'Q1' suffix distinguishes it as an automotive-grade device compliant with AEC-Q100 stress test qualifications. It differs from non-automotive variants by ensuring reliability under harsh automotive environmental conditions. The B5 variant specifically offers a higher gain compared to other members of the series.

FAQ

What is the maximum common-mode voltage supported?

The INA241B5QDGSRQ1 supports a common-mode voltage range from -5 V to 100 V.

Is this device suitable for bidirectional current sensing?

Yes, it is a bidirectional current sense amplifier capable of handling positive and negative current flows.

What is the fixed voltage gain of this specific model?

The INA241B5QDGSRQ1 has a fixed gain of 200 V/V.