Features
• Two Outputs, VREF and VREF / 2, for Convenient Use in Single-Supply Systems
• Excellent Temperature Drift Performance: – 8 ppm/°C (max) from –40°C to 125°C
• High Initial Accuracy: ±0.05% (max)
• VREF and VBIAS Tracking over Temperature: – 6 ppm/°C (max) from –40°C to 85°C – 7 ppm/°C (max) from –40°C to 125°C
• Microsize Package: SOT23-5
• Low Dropout Voltage: 10 mV
• High Output Current: ±20 mA
• Low Quiescent Current: 360 μA
• Line Regulation: 3 ppm/V
• Load Regulation: 8 ppm/mA
• Matte-Sn version (REF2025AISDDCR) for improved corrosion resistance in the Battelle Class III and similar harsh environments.
Applications
• Digital Signal Processing: – Power Inverters – Motor Controls
• Current Sensing
• Industrial Process Controls
• Medical Equipment
• Data Acquisition Systems
• Single-Supply Systems
Description
Applications with only a positive supply voltage often require additional stable voltage in the middle of the analog-to-digital converter (ADC) input range to bias input bipolar signals. The REF20xx provides a reference voltage (VREF) for the ADC and a second highly-accurate voltage (VBIAS) that can be used to bias the input bipolar signals.
The REF20xx offers excellent temperature drift (8 ppm/°C, max) and initial accuracy (0.05%) on both the VREF and VBIAS outputs while operating at a quiescent current less than 430 µA. In addition, the VREF and VBIAS outputs track each other with a precision of 6 ppm/°C (max) across the temperature range of –40°C to 85°C. All these features increase the precision of the signal chain and decrease board space, while reducing the cost of the system as compared to a discrete solution. Extremely low dropout voltage of only 10 mV allows operation from very low input voltages, which can be very useful in battery-operated systems.
Both the VREF and VBIAS voltages have the same excellent specifications and can sink and source current equally well. Very good long-term stability and low noise levels make these devices ideally-suited for high-precision industrial applications.
(Picture:Pinout / Diagram)
