INA190A4IDDFR

Overview

The INA190A4IDDFR is a bidirectional current sense amplifier from Texas Instruments, housed in an 8-pin SOT-23-THIN package. It operates with a supply voltage range of 1.7 V to 5.5 V and supports common-mode voltages from -200 mV to 40 V. The device features a fixed gain of 200 V/V, a 3-dB bandwidth of 33 kHz, and a typical input bias current of 500 pA. Key electrical specifications include a maximum gain error of 0.06%, a common-mode rejection ratio of 150 dB, and an operating quiescent current of 65 uA. It functions within a temperature range of -40°C to +125°C.

Feature Summary

• Bidirectional sensing capability for monitoring current flow in both directions across the shunt resistor.
• Ultra-low input bias current specification enabling high-impedance source compatibility.
• Integrated enable pin functionality for power management control.

Applications

• Battery management systems
• Overcurrent protection circuits
• Load switch control

Procurement Notes

Verify the specific suffix IDDFR indicates reel packaging when ordering. Confirm the A4 grade accuracy meets design requirements. Check manufacturer lifecycle status as end-of-life notifications may apply to this component series. Ensure ESD handling protocols are followed during assembly due to sensitive input stages.

Selection Notes

Select this part for applications requiring precise bidirectional current monitoring with low power consumption. The 200 V/V gain suits scenarios with small voltage drops across the sense resistor. Verify that the 40 V common-mode range aligns with the system bus voltage. Consider the SOT-23-8 package constraints for thermal and spatial limitations.

Part Context

This component belongs to the INA190 family of ultraprecise current sense amplifiers. It shares architectural similarities with other variants like the INA190A3 and INA190A5 but differs in fixed gain settings. The family emphasizes low noise and high CMRR for accurate measurements in noisy environments.

Replacement Considerations

INA190A4IDDFT is the tape-and-reel equivalent with identical electrical characteristics but different packaging format. Other INA190 variants offer different gains or packages but require circuit re-evaluation.