ISL21009BFB812Z-TK

Overview

The ISL21009BFB812Z-TK is a high voltage input precision voltage reference utilizing Intersil's proprietary Floating Gate Analog (FGA) technology. It provides a fixed 1.25V output with an initial accuracy of ±0.5mV and a temperature coefficient of 3ppm/°C. The device operates within an input voltage range of 3.5V to 16.5V, drawing a maximum supply current of 180µA. It features low output noise of 4.5µV P-P in the 0.1Hz to 10Hz bandwidth and supports up to ±7.0mA output current capability. The component is housed in an 8-lead SOIC package and functions reliably across an operating 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.
• Offers guaranteed high initial accuracy with a trim pin allowing user adjustment of approximately ±2.5%.
• Provides ultra-low noise performance suitable for sensitive analog signal processing applications.

Applications

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

Procurement Notes

Verify that the specific suffix '-TK' corresponds to tape and reel packaging as defined in manufacturer technical briefs. Confirm RoHS compliance status and ensure the ordering information matches the required initial accuracy grade and temperature coefficient specifications for your design requirements.

Selection Notes

Select this component when designing systems requiring high DC precision combined with low power consumption. The wide input voltage range accommodates various supply rails, while the low noise profile ensures signal integrity in data acquisition circuits. Consider the thermal hysteresis characteristics during board layout planning.

Part Context

This part belongs to the ISL21009 family of FGA™ voltage references manufactured by Renesas Electronics Corporation (formerly Intersil). The series is designed to replace traditional bandgap references in applications demanding superior stability and lower quiescent current. The specific model denotes the 1.25V output option with the highest precision grade available in the lineup.

Replacement Considerations

ISL21009CFB812Z-TK

FAQ

How does the TRIM pin function on the ISL21009?

The TRIM pin allows the user to adjust the output voltage up or down by approximately 2.5%. It should be connected to the wiper of a potentiometer placed between VOUT and GND.

What are the limitations regarding capacitive loads?

The output stage does not drive heavily capacitive loads well. For load capacitances above 0.001µF, a specific RC noise reduction network is recommended to maintain stability and improve transient response.