ISL21009CFB841Z

Overview

The ISL21009CFB841Z is a precision micropower voltage reference manufactured by Intersil, now part of Renesas Electronics. It utilizes bandgap technology to deliver a fixed output voltage of 1.25V with an initial accuracy of ±0.2%. The device operates from a single supply voltage ranging from 2.2V to 5.5V and features a low dropout characteristic of 150mV. It provides an output current source capability of up to 25mA while maintaining a typical supply current of only 48μA. The component is designed for operation across an extended temperature range of -40°C to +125°C and is housed in a compact 8-lead TDFN package.

Feature Summary

• Delivers high precision with ±0.2% initial accuracy for critical measurement applications
• Enables extended battery life through ultra-low micropower consumption
• Provides robust performance over wide industrial temperature ranges
• Offers high output drive capability within a minimal footprint

Applications

• Battery management and monitoring systems
• Portable instrumentation and medical electronics
• Precision data acquisition systems
• Low power standby voltage regulation

Procurement Notes

Verify the manufacturer status as Intersil products are integrated into the Renesas portfolio. Confirm that the specific suffix indicates the correct package type and temperature grade. Ensure compliance with current RoHS directives and check for any product lifecycle notifications or obsolescence warnings issued by the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when a stable 1.25V reference is required with tight initial accuracy tolerances. It is suitable for designs prioritizing low quiescent current to maximize battery-operated device longevity. Consider the 25mA sourcing capability if driving moderate loads without external buffering. Verify that the operating input voltage remains within the specified 2.2V to 5.5V range for proper regulation.

Part Context

This component belongs to the ISL21010 family of micropower voltage references. The family shares similar architectural characteristics, including bandgap regulation and low dropout performance. Variations within the family typically involve different fixed output voltages or package options. This specific part number denotes the 1.25V output variant in the 8-lead TDFN configuration.

Replacement Considerations

Consult Renesas official legacy documentation for verified substitute part numbers. Cross-reference specifications such as output voltage, accuracy, and package dimensions with alternative devices from other manufacturers if necessary.