ISL21009DFB812Z-TK

Overview

The ISL21009DFB812Z-TK is a high voltage input precision voltage reference utilizing Intersil's proprietary Floating Gate Analog (FGA) technology. It provides a fixed output voltage of 1.250V 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, 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 an operating temperature range from -40°C to +125°C. The component is housed in an 8-lead SOIC package.

Feature Summary

• Utilizes proprietary Floating Gate Analog technology for extremely low power consumption and high precision.
• Offers guaranteed initial accuracy as low as ±2.0mV with minimal temperature drift.
• Features ultra-low output noise performance suitable for sensitive analog circuits.
• Includes a dedicated TRIM pin allowing user-adjustable output voltage variation.

Applications

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

Procurement Notes

Verify that the ordering suffix matches the required tape and reel configuration, as the base part number requires the specific suffix for this packaging type. Confirm the manufacturer designation aligns with Renesas Electronics or Intersil legacy documentation. Ensure the component grade corresponds to the specified initial accuracy and temperature coefficient parameters before finalizing procurement orders.

Selection Notes

Select this component when applications require a balance of low power consumption and high DC precision. The wide input voltage range accommodates various supply rails without complex regulation. Consider the specific accuracy grade necessary for the target application, as tighter tolerances are available within the broader ISL21009 family. Evaluate thermal management requirements given the plastic SOIC package constraints.

Part Context

This device belongs to the ISL21009 FGA™ voltage reference family, designed for high-performance control and data acquisition systems. The series leverages advanced floating gate CMOS processes to achieve characteristics distinct from traditional bandgap references. It serves as a critical reference source for precision analog-to-digital and digital-to-analog conversion stages in industrial environments.

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%. This is achieved by connecting a potentiometer between VOUT and GND, with the wiper connected to the TRIM pin.

What is the impact of X-ray exposure on this device?

X-ray exposure can cause permanent changes in the device output voltage due to the floating gate technology. Shielding with copper or aluminum is recommended if the device is expected to pass through airport screening machines multiple times.