INA190A1IDCKR

Overview

The INA190A1IDCKR is a bidirectional, low-power, zero-drift precision 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 wide common-mode voltage range from -0.2 V to +40 V, independent of the supply voltage. Key electrical specifications include a maximum input offset voltage of ±15 µV, a typical input bias current of 500 pA, and a gain error of ±0.2%. It consumes a typical quiescent current of 50 µA at 25°C and drops to 0.1 µA in shutdown mode. The component is housed in a SC-70-6 package and operates 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.
• Bidirectional sensing capability allows detection of current flow in both directions across the shunt resistor.
• Ultra-low input bias current enables accurate measurement of microamp-level currents using larger sense resistors.
• Integrated enable pin reduces power consumption significantly when the device is not actively monitoring.

Applications

• Battery management systems in portable electronics
• Overcurrent protection circuits in industrial equipment
• Current monitoring in battery chargers and power supplies
• System optimization and closed-loop feedback in mobile devices

Procurement Notes

Verify the specific suffix IDCKR corresponds to the SC-70-6 package and tape-and-reel orientation required for your assembly process. Confirm that the A1 variant matches the necessary 25 V/V gain for your signal conditioning needs. Ensure compatibility with the -40°C to +125°C operating range specified for your application environment. Check for any recent production changes or lifecycle status updates directly from Texas Instruments before finalizing procurement.

Selection Notes

Select this component when precise bidirectional 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 amplification to match ADC input ranges. Consider the SC-70-6 package if board real estate is limited. The zero-drift technology makes it ideal for applications demanding accuracy without frequent calibration, particularly where temperature variations are significant.

Part Context

This part belongs to the INA190 family of current-shunt monitors designed for high-accuracy applications. The family offers multiple gain options (25, 50, 100, 200, 500 V/V) to suit different shunt resistor values and voltage levels. The INA190 series is characterized by its ultra-low power consumption and wide common-mode voltage range, making it versatile for both high-side and low-side sensing configurations in modern electronic systems.

Replacement Considerations

Direct substitutes within the same family include INA190A2IDCKR (50 V/V), INA190A3IDCKR (100 V/V), INA190A4IDCKR (200 V/V), and INA190A5IDCKR (500 V/V). These parts share identical pinouts, packages, and general electrical characteristics, differing only in their fixed internal gain. Designers must ensure the system's expected shunt voltage and desired output swing align with the alternative gain factor.