INA190A2IRSWT

Overview

The INA190A2IRSWT is a unidirectional current shunt monitor manufactured by Texas Instruments. It operates within 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 50 V/V, a gain error of -0.06%, and an input offset voltage of -3 µV. Key electrical specifications include a bandwidth of 37 kHz, a power supply current of 65 µA, and a CMRR of 150 dB. It functions across a temperature range of -40°C to +125°C and is housed in a 10-UQFN package.

Feature Summary

• Ultra-precise zero-drift architecture ensuring high accuracy with minimal offset drift over temperature
• Wide bidirectional common-mode voltage range supporting high-side sensing applications up to 40 V
• Low quiescent current consumption suitable for battery-powered and energy-efficient systems

Applications

• High-side current monitoring in industrial process controls
• Power management circuits in portable electronic devices
• Overcurrent protection mechanisms in server backplanes

Procurement Notes

Verify the specific suffix IRSWT confirms the UQFN-10 package and tape-and-reel shipping configuration. Confirm the A-grade accuracy class matches design requirements for low offset voltage. Check manufacturer lifecycle status as end-of-life notices may impact long-term availability. Ensure RoHS compliance documentation aligns with regional regulatory standards.

Selection Notes

Select this component when precise DC accuracy is critical due to its ultra-low offset voltage and drift characteristics. The 50 V/V gain is optimal for interfacing with ADCs requiring higher signal levels from small shunt drops. Consider the 10-UQFN package for space-constrained PCB layouts compared to larger SOIC or DFN options.

Part Context

This part belongs to the INA190 family of current sense amplifiers designed for high-precision applications. It complements other variants like the INA190A4IRSWT which offers different gain configurations. The series emphasizes low noise and high CMRR for noisy industrial environments.

Replacement Considerations

INA190A1IRSWT: Offers similar precision but with a 200 V/V gain and 45 kHz bandwidth. INA190A3IDCKR: Provides 100 V/V gain in a smaller SC-70-6 package. Verify pin compatibility and gain requirements before substitution.