INA190A3IDDFR

Overview

The INA190A3IDDFR is a bidirectional current sense amplifier from Texas Instruments, featuring a fixed gain of 100 V/V. 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. Key electrical parameters include a 35 kHz bandwidth, 150 dB CMRR, and 500 pA input bias current. The device offers low offset voltage of 3 µV and consumes 65 µA of supply current. It is housed in an 8-pin SOT-23-THIN package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Provides high-precision bidirectional current sensing with ultra-low input bias current for minimal measurement error.
• Features zero-drift architecture ensuring stable performance across wide temperature variations.
• Supports high common-mode voltage ranges up to 40 V while operating on low single-supply voltages.

Applications

• Battery management systems requiring precise cell-level monitoring
• Industrial process control loops with shunt-based current feedback
• Overcurrent protection circuits in power distribution units

Procurement Notes

Verify the specific suffix IDDFR confirms the tape-and-reel packaging format intended for automated surface-mount assembly. Confirm that the A3 variant corresponds to the required 100 V/V gain setting for your circuit design. Ensure compatibility with the 8-pin SOT-23-THIN footprint during PCB layout verification.

Selection Notes

Select this component when bidirectional current measurement is necessary within a 40 V common-mode window. The 100 V/V gain suits applications requiring moderate signal amplification without excessive output swing limitations. Consider the 65 µA quiescent current for battery-powered constraints and the 35 kHz bandwidth for dynamic load responses.

Part Context

This part belongs to the INA190 family of ultraprecise current sense amplifiers. It shares core architectural features with other variants like the INA190A2 and INA190A4 but differs specifically in its fixed internal gain configuration. The family is designed for high-side and low-side sensing applications where precision and low power consumption are critical.

Replacement Considerations

Direct pin-compatible substitutes within the same series include INA190A2IDDFR (50 V/V gain) and INA190A4IDDFR (200 V/V gain). Verify that the alternative gain factor aligns with your system's ADC input requirements before substitution.