ISL21009DFB850Z

Overview

The ISL21009DFB850Z is a high voltage input precision voltage reference utilizing Intersil’s proprietary Floating Gate Analog (FGA) technology. It provides a fixed output voltage of 5.000V with an initial accuracy of ±2.0mV and a temperature coefficient of 10ppm/°C. The device operates within an input voltage range of 3.5V to 16.5V, consuming a maximum supply current of 180µA. Key performance metrics include low output noise of 4.5µV P-P (0.1Hz to 10Hz), up to ±7.0mA output current capability, and operation across a temperature range of -40°C to +125°C in an 8-lead SOIC package.

Feature Summary

• Utilizes proprietary Floating Gate Analog technology for extremely low power consumption and high precision.
• Features very low output voltage noise of 4.5µV P-P in the 0.1Hz to 10Hz bandwidth.
• Offers guaranteed initial accuracy as low as ±0.5mV with minimal temperature drift.
• Supports output voltage adjustment via a dedicated TRIM pin for fine-tuning applications.

Applications

• High Resolution A/Ds and D/As
• Digital Meters
• Battery Management/Monitoring
• Industrial/Instrumentation Equipment

Procurement Notes

Verify the specific suffix 'DFB850Z' against the manufacturer's official ordering guide to confirm the 5.000V output option, ±2.0mV accuracy grade, and 10ppm/°C temperature coefficient. Ensure the package type matches the required 8 Ld SOIC form factor. Check for any tape and reel availability requirements by confirming if a '-TK' suffix is necessary for bulk procurement instead of standard tube packaging.

Selection Notes

Select this component when a stable 5.000V reference is required with moderate accuracy specifications. The 10ppm/°C temperature coefficient suits applications where extreme thermal stability is not critical compared to higher-grade options. Consider the 180µA maximum supply current for battery-powered designs, but account for the 100µs turn-on settling time during power-up sequencing. Ensure the input voltage remains within the 3.5V to 16.5V operational window.

Part Context

The ISL21009 series belongs to Renesas Electronics' FGA™ voltage reference family, designed for high-performance control and data acquisition systems. This specific part represents the 5.000V output variant within the broader lineup that includes 1.250V, 2.500V, and 4.096V options. The series is characterized by its ability to provide versatile precision references with low power consumption, leveraging advanced floating gate CMOS processes for superior long-term stability.

Replacement Considerations

Direct substitutes within the same accuracy and voltage class include ISL21009CFB850Z (±1.0mV, 5ppm/°C) and ISL21009BFB850Z (±0.5mV, 3ppm/°C). For lower accuracy requirements, ISL21009DFB825Z offers a 2.500V alternative with identical ±2.0mV and 10ppm/°C specifications.