ISL21009CFB812Z-TK

Overview

The ISL21009CFB812Z-TK is a high voltage input precision voltage reference from the FGA™ series, manufactured by Intersil (Renesas). It provides a fixed 1.25V output with an initial accuracy of ±0.5mV. The device operates within an input voltage range of 3.5V to 16.5V and delivers up to ±7.0mA output current. Key electrical characteristics include a maximum supply current of 180µA, low noise of 4.5µVP-P (0.1Hz to 10Hz), and a temperature coefficient of 3ppm/°C. It functions reliably across an operating temperature range of -40°C to +125°C in an 8-lead SOIC package.

Feature Summary

• Delivers high DC precision with an initial accuracy of ±0.5mV for stable reference generation.
• Features ultra-low noise performance of 4.5µVP-P in the 0.1Hz to 10Hz band.
• Supports wide input voltage operation ranging from 3.5V to 16.5V.
• Maintains stability over extended industrial temperatures with a 3ppm/°C temperature coefficient.

Applications

• High resolution analog-to-digital and digital-to-analog converters
• Precision digital meters and instrumentation equipment
• Battery management and monitoring systems

Procurement Notes

Verify the specific suffix 'TK' against official Renesas documentation to confirm tape-and-reel packaging details. Confirm RoHS compliance status as manufacturing processes evolve. Check for product discontinuance notices or lifecycle changes, as older Intersil parts may have limited availability. Ensure the 1.25V output variant matches the design requirement before procurement.

Selection Notes

Select this component when designing circuits requiring sub-millivolt accuracy and minimal low-frequency noise. The wide input voltage range allows flexibility in power supply design compared to lower-voltage references. Consider the 180µA supply current for battery-powered applications where efficiency is critical. The ±7.0mA drive capability supports moderate load requirements without external buffering.

Part Context

This part belongs to the ISL21009 family of FGA™ voltage references, designed for high-performance signal chain applications. The manufacturer transitioned from Intersil to Renesas Electronics, maintaining the same core technology. The 8-lead SOIC package offers a compact footprint suitable for dense PCB layouts in industrial and measurement devices.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided data. Verify compatibility with alternative precision references based on matching accuracy, noise, and temperature coefficient specifications.