INA190A4QDDFRQ1

Overview

The INA190A4QDDFRQ1 is an AEC-Q100 qualified, bidirectional current sense amplifier with a fixed gain of 200 V/V. It operates on a single supply voltage from 1.7 V to 5.5 V and supports common-mode voltages from -0.2 V to +40 V. The device features ultra-low input bias current (typical 0.5 nA) and low quiescent current (typical 65 µA). It includes an enable pin for power management, reducing shutdown current to less than 100 nA. The offset voltage is specified at a maximum of ±15 µV, ensuring high precision in microamp-level current measurements.

Feature Summary

• Ultra-low input bias current enables accurate measurement of microamp-level currents using larger sense resistors.
• Bidirectional sensing capability allows monitoring of current flow in both directions via the REF pin.
• Integrated enable pin reduces system power consumption by placing the output in a high-impedance state when disabled.
• High common-mode rejection ratio minimizes errors caused by large DC common-mode voltage variations.

Applications

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

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm AEC-Q100 qualification status for automotive integration. Ensure the selected gain variant aligns with the target measurement range. Check for functional safety documentation requirements if used in safety-critical designs.

Selection Notes

Select this component for applications requiring precise low-current monitoring in automotive environments. The 200 V/V gain is suitable for small differential signals. Consider the SC70 or SOT-23 package options based on board space constraints. Verify that the common-mode voltage range covers the system's bus voltage requirements.

Part Context

This device belongs to the INA190-Q1 family of ultra-precise current sense amplifiers designed for automotive use. It shares core specifications with other gain variants in the series, differing primarily in fixed internal gain settings. The DDF package provides the additional enable functionality not available in all package types within the same family.

Replacement Considerations

Other INA190-Q1 variants with different gains (e.g., INA190A3QDDFRQ1 for 100 V/V or INA190A5QDDFRQ1 for 500 V/V) are pin-compatible replacements if gain adjustment is acceptable. Non-automotive INA190 devices lack AEC-Q100 qualification and may not meet automotive reliability standards.