INA190A5IDCKR

Overview

The INA190A5IDCKR is a bidirectional, ultra-precise current sense amplifier manufactured by Texas Instruments. It operates with a common-mode voltage range from -200 mV to 40 V and supports supply voltages between 1.7 V and 5.5 V. The device features a fixed gain of 500 V/V, an input bias current of 500 pA, and an input offset voltage of 3 µV. Key electrical specifications include a gain error of 0.08%, a CMRR of 150 dB, and a bandwidth product of 27 kHz. It functions within a temperature range of -40°C to +125°C and is housed in a SC-70-6 package.

Feature Summary

• Bidirectional sensing capability for accurate measurement across positive and negative current flows
• Ultra-low input bias current enabling high-precision detection in low-current applications
• Integrated enable pin for power management and system control flexibility

Applications

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

Procurement Notes

Verify the specific suffix IDCKR confirms the SC-70-6 surface-mount package and tape-and-reel delivery format. Confirm RoHS compliance status and moisture sensitivity level requirements against your assembly line capabilities. Ensure the 500 V/V gain variant matches your signal conditioning design before procurement.

Selection Notes

Select this component when bidirectional accuracy is critical alongside ultra-low bias current performance. The 500 V/V gain suits applications requiring significant signal amplification from small shunt voltages. Consider the SC-70-6 footprint constraints and the 40 V common-mode limit relative to your bus voltage levels.

Part Context

This part belongs to the INA190 series of zero-drift current sense amplifiers. It shares architectural similarities with other variants like the INA190A3 and INA190A4 but differs in fixed gain configuration. The series emphasizes precision and low power consumption for battery-operated and industrial sensing tasks.

Replacement Considerations

Direct substitutes include INA190A5IDCKT (same die, different reel packaging) and INA190A5IDDFR (different SOT-23-8 package). Verify pinout compatibility and thermal characteristics when transitioning between these package options.