INA190A3IDCKT

Overview

The INA190A3IDCKT is a bidirectional, ultra-precise current sense amplifier from Texas Instruments. It features a fixed gain of 100 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 an input bias current of 500 pA, an input offset voltage of 3 uV, and a gain error of 0.06%. It offers a common-mode rejection ratio of 150 dB and a bandwidth of 35 kHz. The component is housed in a SC-70-6 package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Ultra-precise zero-drift architecture ensuring high accuracy with low input offset voltage and minimal drift over temperature.
• Bidirectional sensing capability allowing detection of both positive and negative currents relative to ground.
• Integrated enable pin for power management, reducing consumption when the circuit is inactive.
• High common-mode rejection ratio providing robust performance in noisy environments with varying common-mode voltages.

Applications

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

Procurement Notes

Verify the specific suffix IDCKT corresponds to the SC-70-6 tape-and-reel packaging configuration. Confirm that the A3 grade meets the required gain accuracy and offset voltage specifications for the target application. Ensure compatibility with the system's common-mode voltage levels and supply rail constraints before integration.

Selection Notes

Select this component when bidirectional sensing is required alongside ultra-low bias current and high precision. The fixed 100 V/V gain suits applications where moderate amplification is sufficient without external resistors. Consider the SC-70-6 package size for space-constrained designs. Evaluate the trade-off between the 35 kHz bandwidth and the ultra-low noise characteristics for dynamic signal requirements.

Part Context

This part belongs to the INA190 family of current sense amplifiers designed for high-precision measurements. The family distinguishes itself through picoampere-level input bias currents and integrated enable functionality. Variants within the series offer different gains and packages, but share the core zero-drift technology and wide common-mode voltage range suitable for demanding industrial and consumer applications.

Replacement Considerations

INA190A3IDCKR: Identical electrical specifications and function; differs only in reel versus cut-tape packaging format.

FAQ

What is the maximum common-mode voltage supported by the INA190A3IDCKT?

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

Does the INA190A3IDCKT support bidirectional current sensing?

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

What is the input bias current specification for this amplifier?

The input bias current is specified at 500 pA, contributing to its ultra-precise classification.