ISL21009CFB850Z-TK

Overview

The ISL21009CFB850Z-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 5.000V 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, 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 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 high precision.
• Provides guaranteed initial accuracy as low as ±1.0mV with a temperature coefficient of 5ppm/°C.
• Features ultra-low output voltage noise of 4.5µV P-P in the 0.1Hz to 10Hz bandwidth.
• Includes a TRIM pin allowing user adjustment of the output voltage by approximately ±2.5%.

Applications

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

Procurement Notes

Verify that the ordering suffix matches the required packaging configuration. The '-TK' suffix indicates the device is supplied in tape and reel format rather than standard tubes. Confirm the specific grade 'C' corresponds to the required ±1.0mV accuracy and 5ppm/°C temperature coefficient specifications. Ensure compatibility with RoHS compliance requirements for Pb-free plastic packaged products.

Selection Notes

Select this component when designing systems requiring a stable 5.000V reference with minimal drift over wide temperature ranges. The low supply current makes it suitable for battery-powered portable instruments where power conservation is critical. Consider the 100µs turn-on settling time during power-up sequencing. Evaluate board mounting locations carefully to minimize mechanical stress on the die, which can affect long-term accuracy.

Part Context

This part belongs to the ISL21009 FGA™ voltage reference family manufactured by Renesas Electronics Corporation (formerly Intersil). The family includes variants with different output voltages (1.25V, 2.500V, 4.096V, 5.000V) and accuracy grades (B, C, D). The ISL21009 series is designed for applications demanding high DC precision and low noise performance.

Replacement Considerations

Compatible substitutes include other ISL21009 variants such as ISL21009BFB850Z or ISL21009DFB850Z, depending on whether tighter or looser accuracy tolerances are acceptable. Verify that any replacement maintains the same 8-lead SOIC package footprint and electrical characteristics.