ISL21009
Ultra-high precision 2.5V voltage reference with 3ppm/°C drift for data acquisition and precision measurement.
Product Overview
Description
The ISL21009 is an ultra-high precision bandgap voltage reference featuring exceptional temperature stability and low noise.
With only 3ppm/°C maximum temperature coefficient and initial accuracy of ±0.05%, it provides stable reference voltage for high-resolution data converters and precision measurement systems.
The device operates from 3V to 5.5V and provides 2.5V output with 5mA drive capability, making it ideal for ADC/DAC reference and precision power supplies.
Product Series
ISL
Primary Application
ADC/DAC reference
Key Features
- Ultra-low temperature drift 3ppm/°C
- High initial accuracy ±0.05%
- Low noise 4µVpp
- Wide operating temperature -40°C to +125°C
- 5mA output drive capability
- Excellent line/load regulation
- Low supply current 280µA
- AEC-Q100 qualified
Specifications
| Output Voltage | 2.5V |
|---|---|
| Initial Accuracy | ±0.05% |
| Temperature Coefficient | 3ppm/°C max |
| Output Noise | 4µVpp (0.1Hz-10Hz) |
| Line Regulation | 10ppm/V |
| Load Regulation | 15ppm/mA |
| Supply Current | 280µA |
| Package | SOT-23, SOIC-8 |
Applications
ADC/DAC reference
Data acquisition and conversion
Precision measurement
Data acquisition and conversion
Test equipment
Electronic system design
Medical devices
Medical electronics
Automotive sensors
Sensor signal conditioning
FAE Expert Insights
"The ISL21009 is an exceptional voltage reference for precision applications. The 3ppm/°C drift is among the best available - I've used this reference in 16-bit data acquisition systems where temperature stability was critical. The low 1/f noise makes it suitable for precision DC measurements. The AEC-Q100 qualification is valuable for automotive applications. While more expensive than basic references, the performance justifies the cost for precision applications. For high-resolution ADCs, this reference helps achieve the full accuracy potential of the converter."
Ultra-precision reference for demanding applications
— Jennifer Liu, BeiLuo
Frequently Asked Questions
How do I select bypass capacitors for ISL21009?
For optimal performance: Use 0.1µF ceramic capacitor close to the input pin; Use 1-10µF ceramic capacitor on output for stability; Add 0.01µF ceramic in parallel for high-frequency noise; Keep capacitor leads short; Use X7R or C0G dielectrics for temperature stability. For lowest noise applications, consider additional filtering with a small series resistor and capacitor.
Use quality ceramic capacitors with short connections. Contact us for precision reference design guidance.