REF2025 代理 价格咨询 13828760986
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.
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
