ISL21009BFB850Z

Overview

The ISL21009BFB850Z is a high precision, low noise 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 ±0.5mV and a temperature coefficient of 3ppm/°C. The device operates within an input voltage range of 5.5V to 16.5V and consumes a maximum supply current of 180µA. It features an output noise of 4.5µV P-P in the 0.1Hz to 10Hz bandwidth and supports up to ±7.0mA output current. Packaged in an 8-lead SOIC, it functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Utilizes proprietary Floating Gate Analog technology for extremely low power consumption and minimal temperature drift.
• Delivers high initial accuracy with guaranteed tolerance as tight as ±0.5mV at room temperature.
• Provides ultra-low output noise performance suitable for sensitive analog signal chains.
• Includes a dedicated TRIM pin allowing for user-adjustable output voltage variation.

Applications

• High resolution A/Ds and D/As
• Digital Meters
• Industrial Instrumentation Equipment

Procurement Notes

Verify the specific suffix 'BFB850Z' against the manufacturer datasheet FN6327.7 to confirm the 5.000V output option and ±0.5mV accuracy grade. Ensure the package type matches the 8 Ld SOIC specification. Check for RoHS compliance status and confirm availability as the product line may have discontinuation notices.

Selection Notes

Select this component when designing systems requiring a stable 5V reference with minimal power draw. The wide input voltage range accommodates various supply rails. Consider the 100µs turn-on settling time for power sequencing requirements. Evaluate thermal management needs given the plastic SOIC package constraints.

Part Context

This part belongs to the ISL21009 FGA™ voltage reference family manufactured by Renesas Electronics Corporation (formerly Intersil). The series is characterized by its use of floating gate CMOS processes to achieve superior stability and low noise compared to traditional bandgap references.

Replacement Considerations

Consult official substitution lists or cross-reference tools provided by Renesas Electronics for verified alternatives. Do not assume functional compatibility with other voltage reference models without verifying electrical parameters and pin configurations.

FAQ

How does the ISL21009 handle capacitive loads?

The device does not drive heavily capacitive loads well. For capacitances above 0.001µF, an external RC noise reduction network is recommended to maintain stability and improve transient response.

What is the purpose of the TRIM pin?

The TRIM pin allows the user to adjust the output voltage up or down by approximately 2.5% using an external potentiometer connected between VOUT and GND.