ISL21009CFB825Z-TK

Overview

The ISL21009CFB825Z-TK is a high voltage input precision, low noise FGA™ voltage reference manufactured by Renesas Electronics Corporation. It provides a fixed output voltage of 2.500V with an initial accuracy of ±1.0mV and a temperature coefficient of 5ppm/°C. The device operates within an input voltage range of 3.5V to 16.5V and features extremely low output voltage noise of 4.5µV P-P from 0.1Hz to 10Hz. Maximum supply current is 180µA, supporting micropower applications. It utilizes Intersil's proprietary Floating Gate Analog technology for high stability and low drift. The component is housed in an 8-lead SOIC package and supports operation over an industrial temperature range of -40°C to +125°C.

Feature Summary

• Utilizes proprietary Floating Gate Analog (FGA) technology to achieve high DC precision and extremely low temperature drift without relying on traditional bandgap references.
• Delivers ultra-low output voltage noise performance of 4.5µV P-P in the 0.1Hz to 10Hz bandwidth, suitable for sensitive analog signal chains.
• Features a wide input voltage operating range from 3.5V to 16.5V, allowing flexibility in power supply design while maintaining stable regulation.
• Includes a dedicated TRIM pin that allows users to adjust the output voltage up or down by approximately 2.5% using external components.

Applications

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

Procurement Notes

Verify the specific suffix '-TK' indicates tape and reel packaging as per manufacturer documentation. Confirm RoHS compliance status and check for any product change notices regarding lead finish or manufacturing location updates. Ensure the ordering code matches the required accuracy grade and temperature coefficient specifications for your application requirements.

Selection Notes

Select this component when low power consumption is critical alongside high precision requirements. The 5ppm/°C temperature coefficient offers a balance between cost and performance compared to tighter tolerance grades. Consider the 8-lead SOIC package constraints and ensure board mounting locations minimize mechanical stress to maintain accuracy.

Part Context

This part belongs to the ISL21009 family of voltage references, which are fabricated using Intersil's specialized Floating Gate Analog process. The family includes various output voltage options and accuracy grades. The 'CFB825Z' designation specifically identifies the 2.5V output variant with ±1.0mV accuracy and 5ppm/°C tempco.

Replacement Considerations

ISL21009BFB825Z-TK

FAQ

How can the output voltage be adjusted?

The output voltage can be trimmed 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.