ISL21009BFB825Z-T7A

Overview

The ISL21009BFB825Z-T7A is a high voltage input precision, low noise FGA™ voltage reference fabricated on Intersil’s proprietary Floating Gate Analog technology. It features an output voltage of 2.500V with guaranteed 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 and consumes a maximum supply current of 180µA. Output voltage noise is typically 4.5µV P-P in the 0.1Hz to 10Hz bandwidth. It provides up to ±7.0mA output current capability and is housed in an 8 Ld SOIC package.

Feature Summary

• Utilizes proprietary Floating Gate Analog (FGA) technology for extremely low power consumption and minimal temperature drift.
• Delivers high initial accuracy with guaranteed tolerance as tight as ±0.5mV at +25°C.
• Features ultra-low output voltage noise of 4.5µV P-P across the 0.1Hz to 10Hz frequency band.
• Supports wide input voltage operation ranging from 3.5V to 16.5V.

Applications

• High Resolution A/Ds and D/As
• Digital Meters
• Bar Code Scanners
• Basestations
• Battery Management/Monitoring

Procurement Notes

Verify the specific suffix '-T7A' against official manufacturer documentation, as standard datasheets list '-TK' for tape and reel packaging. Confirm RoHS compliance status and check for product change notices or end-of-life announcements prior to procurement. Ensure the ordering information matches the required initial accuracy grade and temperature coefficient specifications.

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 sensitive data acquisition paths. Consider the thermal hysteresis and long-term stability characteristics for applications demanding strict accuracy over extended operational periods.

Part Context

This part belongs to the ISL21009 family of high voltage input precision voltage references. The series utilizes Floating Gate Analog technology to achieve superior performance metrics compared to traditional bandgap references. The family offers multiple output voltage options including 1.25V, 2.5V, 4.096V, and 5.0V, catering to diverse industrial and instrumentation requirements.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.

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

What precautions are necessary regarding X-ray exposure?

X-ray sources, such as airport screening machines, can cause permanent changes in the device's output voltage due to the floating gate technology. Shielding with copper or aluminum planes is recommended if the device is expected to undergo frequent X-ray inspection.