INA190A2IDCKR

Overview

The INA190A2IDCKR is a unidirectional current sense amplifier from Texas Instruments, housed in a SC-70-6 package. It features a fixed gain of 50 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 µA. Key electrical specifications include an input offset voltage of ±3 µV, an input bias current of 500 pA, and a gain error of ±0.06%. It offers a common-mode rejection ratio of 150 dB and a bandwidth of 37 kHz.

Feature Summary

• Provides high-precision current monitoring with ultra-low input offset voltage and bias current for minimal measurement error.
• Supports bidirectional common-mode voltages extending below ground, enabling compatibility with low-side and high-side sensing configurations.
• Delivers exceptional common-mode rejection to maintain accuracy in noisy environments with high common-mode signals.

Applications

• Battery management systems requiring precise cell-level current monitoring
• Portable equipment power management circuits
• Overcurrent protection detection in industrial control systems

Procurement Notes

Verify the specific suffix IDCKR confirms the SC-70-6 package and A-grade accuracy class. Confirm the datasheet revision matches your design requirements for gain and bandwidth parameters. Ensure the operating temperature range aligns with your system's environmental conditions. Check for any recent product change notices regarding assembly sites or marking updates.

Selection Notes

Select this component when a fixed 50 V/V gain is appropriate for the expected shunt voltage drop. The SC-70-6 package is suitable for space-constrained designs. Consider the 37 kHz bandwidth limitation if higher frequency response is required. Verify that the 40 V common-mode limit exceeds the maximum bus voltage in the application.

Part Context

This part belongs to the INA190 family of zero-drift current sense amplifiers. The 'A' designation indicates a tighter accuracy grade compared to standard variants. The 'IDCKR' suffix specifies the SC-70-6 surface-mount package and tape-and-reel shipping format. It complements other gain options like 20 V/V or 100 V/V within the same series.

FAQ

Is the INA190A2IDCKR capable of measuring negative currents?

No, the INA190A2IDCKR is a unidirectional amplifier. It measures current flow in one direction only. For bidirectional current sensing, a different model such as the INA190A2IDCKT or similar bidirectional variant must be used.

What is the maximum common-mode voltage supported by this device?

The device supports a common-mode voltage range from -200 mV to 40 V, allowing it to operate in both low-side and high-side configurations within these limits.