INA190A1IDDFT

Overview

The INA190A1IDDFT is a bidirectional, zero-drift current sense amplifier manufactured by Texas Instruments. It features a fixed gain of 25 V/V and operates with a supply voltage range of 1.7 V to 5.5 V. The device supports a common-mode voltage from -200 mV to 40 V, independent of the supply voltage. Key electrical specifications include a maximum input offset voltage of ±3 µV, a typical input bias current of 500 pA, and a gain error of ±0.04%. It has a bandwidth of 45 kHz and consumes 65 µA of quiescent current. The component is housed in an 8-pin SOT-23-THIN package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Zero-drift architecture ensures low offset voltage and minimal drift over temperature for high-precision measurements.
• Picoamp-level input bias current enables accurate detection of microampere currents using larger shunt resistors.
• Bidirectional operation allows monitoring of current flow in both directions across the shunt resistor.

Applications

• Battery management systems
• Overcurrent protection circuits
• Portable equipment power monitoring

Procurement Notes

Verify the specific suffix IDDFT confirms the SOT-23-THIN-8 package and tape-and-reel shipping configuration. Confirm the A1 grade designation matches the required 25 V/V gain and ±0.04% gain error tolerance. Ensure the operating temperature range meets the application's environmental requirements of -40°C to +125°C. Check for any recent lifecycle notices regarding obsolescence or last-time buy status.

Selection Notes

Select this part when precise low-side or high-side current monitoring is required in space-constrained designs. The 25 V/V gain is suitable for applications where the shunt voltage drop is relatively small but requires significant amplification. The SOT-23-THIN-8 package offers a compact footprint compared to standard SOIC options. Consider the 45 kHz bandwidth limit for high-frequency switching applications.

Part Context

This component belongs to the INA190 family of ultra-precise current sense amplifiers. The family provides multiple gain options (25, 50, 100, 200, 500 V/V) and packaging variants including UQFN and SOT-23-THIN. The INA190 series is designed for battery-powered devices requiring low static current and high accuracy in current measurement tasks.

FAQ

What is the maximum common-mode voltage supported by the INA190A1IDDFT?

The device supports a common-mode voltage range from -200 mV to 40 V, independent of the supply voltage.

Does the INA190A1IDDFT support bidirectional current sensing?

Yes, the INA190A1IDDFT is a bidirectional current sense amplifier capable of detecting current flow in both directions.