INA190A5QDDFRQ1

Overview

The INA190A5QDDFRQ1 is an automotive-grade current sense amplifier featuring a fixed gain of 500 V/V. It operates with a supply voltage range of 1.7 V to 5.5 V and supports bidirectional sensing across a common-mode voltage range of -0.2 V to +40 V. The device includes an enable pin for low-power shutdown, drawing a maximum of 100 nA in the disabled state. Key electrical specifications include a minimum common-mode rejection ratio of 132 dB, a typical quiescent current of 65 µA, and a bandwidth of 27 kHz.

Feature Summary

• Features an integrated enable pin that reduces supply current to less than 0.1 µA when disabled, placing the output in a high-impedance state.
• Supports bidirectional current monitoring by utilizing an external reference voltage at the REF pin to offset the output signal.
• Utilizes a capacitively coupled input stage to achieve very high common-mode rejection and block DC common-mode voltages from downstream circuits.

Applications

• Body control module (BCM)
• Telematics control unit
• Emergency call (eCall) systems
• Battery management system (BMS)

Procurement Notes

Verify the specific suffix 'QDDFRQ1' corresponds to the AEC-Q100 qualified automotive grade, 500 V/V gain option, and SOT-23-THIN-8 package. Confirm the presence of the ENABLE pin functionality, which is exclusive to the DDF package variant within this series. Ensure compatibility with the required operating temperature range of -40°C to +125°C for your application environment.

Selection Notes

Select this component when a high gain of 500 V/V is required to amplify small differential signals from shunt resistors. The inclusion of the ENABLE pin makes it suitable for power-sensitive designs requiring periodic monitoring. Ensure the application can accommodate the 40 V common-mode input range and that the 27 kHz bandwidth meets the signal frequency requirements.

Part Context

This part belongs to the INA190-Q1 family of ultra-precise, low-power current sense amplifiers designed for automotive applications. The family offers five fixed gain options ranging from 25 V/V to 500 V/V. The INA190A5 variant specifically provides the highest gain in the series, optimized for detecting minute current variations in high-side or low-side configurations.

Replacement Considerations

Other members of the INA190-Q1 family share similar features but differ in gain and package availability. For example, the INA190A3QDDFRQ1 offers 100 V/V gain in the same package, while the INA190A5IDDFR provides 500 V/V gain without the automotive qualification or enable pin.