INA190A5IDDFT

Overview

The INA190A5IDDFT is a bidirectional, ultra-precise current sense amplifier manufactured by Texas Instruments. It features a fixed gain of 500 V/V and supports a common-mode voltage range from -200 mV to 40 V. The device operates on a single supply voltage between 1.7 V and 5.5 V with a typical quiescent current of 65 uA. Key electrical specifications include a maximum input offset voltage of 3 uV, an input bias current of 500 pA, and a gain error of 0.08%. It offers a bandwidth of 27 kHz and a common-mode rejection ratio of 150 dB. 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

• Provides high-precision current monitoring with a fixed internal gain of 500 V/V for accurate signal amplification.
• Supports bidirectional current sensing with a wide common-mode voltage range extending up to 40 V.
• Integrates an enable pin to reduce power consumption during inactive periods.
• Delivers exceptional accuracy with picoamp-level input bias current and microvolt-level input offset voltage.

Applications

• Battery management systems requiring precise charge and discharge monitoring
• Industrial process control loops with high-side current sensing
• Overcurrent protection circuits in portable electronic devices

Procurement Notes

Verify the specific suffix IDDFT corresponds to the 8-pin SOT-23-THIN package configuration. Confirm that the A5 grade matches the required 500 V/V gain specification for your circuit design. Ensure compatibility with the -40°C to +125°C operating temperature range. Check for RoHS compliance status if environmental regulations apply to your manufacturing process.

Selection Notes

Select this component when a fixed high gain of 500 V/V is necessary to amplify small differential voltages across a shunt resistor. The low quiescent current of 65 uA makes it suitable for battery-powered applications where energy efficiency is critical. The wide common-mode range allows flexibility in high-side or low-side placement relative to the 40 V limit. Consider the SOT-23-THIN package size constraints against available PCB real estate.

Part Context

This device belongs to the INA190 family of ultra-precise current sense amplifiers designed for demanding measurement applications. The family shares core technologies such as low bias current and high CMRR but varies in gain options and packaging. The A5 variant specifically targets applications requiring the highest available gain within the series to maximize resolution for small current signals.

Replacement Considerations

INA190A5IDDFR: Same electrical specifications and gain, differing only in tape-and-reel packaging format instead of cut tape.

FAQ

What is the fixed voltage gain of the INA190A5IDDFT?

The INA190A5IDDFT has a fixed internal gain of 500 V/V.

Does the INA190A5IDDFT support bidirectional current sensing?

Yes, the device is designed to handle bidirectional current flow, allowing for both sourcing and sinking measurements.

What is the maximum common-mode voltage supported?

The amplifier supports a common-mode voltage range from -200 mV to 40 V.