INA181A1QDBVRQ1

Overview

The INA181A1QDBVRQ1 is a unidirectional current sense amplifier from Texas Instruments, certified to AEC-Q100 standards for automotive applications. It features a fixed gain of 20 V/V and supports a common-mode voltage range from -200 mV to 26 V. The device operates on a single supply voltage between 2.7 V and 5.5 V with a typical supply current of 260 µA. Key electrical specifications include a gain bandwidth product of 350 kHz, a maximum input offset voltage of 100 µV, and a common-mode rejection ratio of 100 dB. It is housed in a compact SOT-23-6 package.

Feature Summary

• Automotive-grade reliability compliant with AEC-Q100 qualification standards
• Bidirectional sensing capability within a wide common-mode voltage range
• High precision performance with low input offset voltage and high CMRR

Applications

• Automotive battery management systems
• Motor control current monitoring
• Load switch current limiting

Procurement Notes

Verify the complete part number including suffixes to ensure correct gain and package configuration. Confirm AEC-Q100 certification requirements match specific automotive project needs. Check datasheet for thermal derating curves relevant to the SOT-23-6 package. Ensure PCB layout adheres to recommended grounding practices for current sense amplifiers to maintain accuracy.

Selection Notes

Select this component when a fixed 20 V/V gain is required for low-side or high-side current sensing in automotive environments. Consider the 26 V common-mode limit against system voltage peaks. Compare supply current and bandwidth against other INA181 variants if power consumption or speed is critical. Verify that the SOT-23-6 footprint fits the design constraints.

Part Context

This device belongs to the INA181-Q1 family of current sense amplifiers designed for automotive use. It shares architectural similarities with other members like the INA181A2QDBVRQ1 but differs in fixed gain settings. The family targets cost-sensitive automotive applications requiring reliable current monitoring without external resistors.

Replacement Considerations

INA181A2QDBVRQ1 offers similar automotive qualification but with a different fixed gain setting.