ISL21009BFB825ZS2568

Overview

The ISL21009BFB825ZS2568 is a high-precision voltage reference utilizing Intersil's proprietary Floating Gate Analog (FGA) technology. It provides a fixed output of 2.5V 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 from 0.1Hz to 10Hz and supports up to ±7.0mA output current. Packaged in an 8-lead SOIC, it functions 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 DC precision with guaranteed initial accuracy as low as ±0.5mV.
• Provides ultra-low output noise performance suitable for sensitive analog signal chains.
• Includes a dedicated TRIM pin allowing user-adjustable output voltage variation.

Applications

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

Procurement Notes

Verify the specific suffix 'S2568' against official manufacturer documentation, as standard datasheets list 'ISL21009BFB825Z'. Confirm RoHS compliance status and check for End-of-Life notices or Product Change Notifications regarding this specific marking code before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring sub-millivolt accuracy combined with microampere-level quiescent current. The wide input voltage range accommodates various supply rails, while the low noise profile ensures optimal resolution for precision data converters. Ensure board layout minimizes mechanical stress on the package to maintain specified thermal hysteresis performance.

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 power operation compared to traditional bandgap references.

Replacement Considerations

Direct replacements include other variants within the ISL21009 family such as ISL21009BFB812Z or ISL21009BFB850Z, provided the required output voltage matches the application needs. Verify that any substitute maintains the same 8-lead SOIC package and electrical specifications.

FAQ

How does the TRIM pin function?

The TRIM pin allows the user to adjust the output voltage up or down by approximately 2.5% by connecting a potentiometer between VOUT and GND, with the wiper connected to the TRIM pin.

What is the recommended handling procedure for X-ray exposure?

X-ray inspection can cause permanent changes in output voltage. If necessary, use shielding such as thin zinc sheeting or copper planes to block X-ray energy affecting the Floating Gate structure.