INA180A4QDBVRQ1

Overview

The INA180A4QDBVRQ1 is a single-channel, automotive-grade current sense amplifier from Texas Instruments. It operates within a supply voltage range of 2.7 V to 5.5 V and supports a common-mode voltage span from -200 mV to 26 V. The device features a fixed gain of 200 V/V, a 3-dB bandwidth of 350 kHz, and a gain-bandwidth product of 105 kHz. Key electrical specifications include an input offset voltage of 100 µV, input bias current of 80 µA, and input offset current of 50 nA. It delivers a CMRR of 100 dB, a slew rate of 2 V/µs, and consumes 260 µA of operating supply current. The component is housed in a SOT-23-5 package and is qualified to AEC-Q100 standards for operation between -40°C and +125°C.

Feature Summary

• Supports bidirectional current sensing with a wide common-mode voltage range extending down to -200 mV.
• Provides high precision with low input offset voltage and low input bias current characteristics.
• Features a fixed internal gain of 200 V/V to simplify circuit design and reduce external component count.
• Delivers high common-mode rejection ratio (CMRR) for accurate measurements in noisy environments.

Applications

• Automotive battery monitoring systems
• High-side and low-side current sensing in power distribution units
• Load management circuits in vehicle electronics
• Motor control applications requiring precise current feedback

Procurement Notes

Verify the specific suffix 'A4' confirms the fixed gain of 200 V/V, as other variants in the series offer different gains. Ensure the 'Q1' designation aligns with required automotive reliability standards. Confirm the 'DBVR' suffix corresponds to the SOT-23-5 package type suitable for surface-mount assembly. Check that the tape-and-reel packaging matches automated placement requirements. Validate that the component meets the specific temperature grade needed for the target application environment.

Selection Notes

Select this part when a fixed gain of 200 V/V is required for high-side or low-side sensing. It is suitable for applications needing a 350 kHz bandwidth and support for negative common-mode voltages. Choose this device over standard operational amplifiers for better accuracy and integrated signal conditioning. Consider the low quiescent current for battery-powered automotive subsystems. Verify that the SOT-23-5 footprint fits the available PCB space constraints.

Part Context

This component belongs to the INA180-Q1 family of current sense amplifiers designed for automotive use. It shares the same package and basic topology with variants like INA180A1QDBVRQ1 and INA180B4QDBVRQ1, differing primarily in gain and initial accuracy grades. The family is characterized by low power consumption and robust performance under harsh automotive conditions.

Replacement Considerations

Direct substitutes within the same family include INA180A1QDBVRQ1 (Gain 20 V/V), INA180B4QDBVRQ1 (Gain 200 V/V, different accuracy grade), and INA180A2QDBVRQ1 (Gain 50 V/V). Cross-family replacements such as INA2180-Q1 may be considered if higher voltage tolerance or different gain options are needed.