ISL21010DFH312Z-TK

Overview

The ISL21010DFH312Z-TK is a micropower voltage reference IC manufactured by Renesas Electronics Corporation. It provides a fixed 1.25V output with ±0.2% initial accuracy. The device operates from a single supply voltage ranging from 2.2V to 5.5V and features a low dropout voltage of 150mV. It delivers an output current source capability of up to 25mA while consuming only 48μA of typical supply current. The component is housed in a space-saving 3-lead SOT-23 package and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Precision bandgap voltage reference architecture ensuring stable output performance
• Micropower operation designed for extended battery life in portable applications
• High output current sourcing capability suitable for driving ADCs and DACs
• Low dropout voltage design enabling efficient power regulation near supply limits

Applications

• Battery management and monitoring systems
• Portable instrumentation devices
• Consumer and medical electronics
• Power regulation circuits requiring precise reference voltages

Procurement Notes

Verify the specific suffix Z-TK indicates tape and reel packaging when ordering. Confirm the DFH312 designation corresponds to the 1.25V output variant. Ensure compatibility with standard SOT-23 footprint requirements during PCB layout. Check for RoHS compliance status if required by project specifications. Validate that the 2.2V minimum input voltage meets system supply constraints.

Selection Notes

Select this component when a low-cost, high-accuracy reference is needed for battery-powered designs. The 1.25V output is ideal for interfacing with microcontrollers and data converters. Consider the 25mA sourcing capability for direct drive applications without additional buffering. The wide operating temperature range supports industrial environments. Evaluate the SOT-23 package size against available board space constraints.

Part Context

This part belongs to the ISL21010 series of precision voltage references from Renesas. The series offers multiple fixed output voltage options including 1.024V, 1.5V, 2.048V, 2.5V, 3.0V, 3.3V, and 4.096V. All variants share similar electrical characteristics such as ±0.2% accuracy and micropower consumption. The series is designed to replace older discrete reference solutions in compact electronic designs.

Replacement Considerations

Direct substitutes include other ISL21010 variants with different output voltages if the 1.25V level is not critical. Verify pinout compatibility with existing SOT-23 layouts. Cross-reference with Intersil branded parts for legacy design continuity. Ensure thermal performance matches application requirements across the specified temperature range.