REF1933 Series
3.3-V Vref, dual-output Vref & Vref/2 voltage reference
Manufacturer: Texas Instruments
Catalog
3.3-V Vref, dual-output Vref & Vref/2 voltage reference
Key Features
• Two Outputs, VREFand VREF/ 2, for Convenient Use in Single-Supply SystemsExcellent Temperature Drift Performance:25 ppm/°C (max) from –40°C to 125°CHigh Initial Accuracy: ±0.1% (max)VREFand VBIASTracking over Temperature:6 ppm/°C (max) from –40°C to 85°C7 ppm/°C (max) from –40°C to 125°CMicrosize Package: SOT23-5Low Dropout Voltage: 10 mVHigh Output Current: ±20 mALow Quiescent Current: 360 µALine Regulation: 3 ppm/VLoad Regulation: 8 ppm/mATwo Outputs, VREFand VREF/ 2, for Convenient Use in Single-Supply SystemsExcellent Temperature Drift Performance:25 ppm/°C (max) from –40°C to 125°CHigh Initial Accuracy: ±0.1% (max)VREFand VBIASTracking over Temperature:6 ppm/°C (max) from –40°C to 85°C7 ppm/°C (max) from –40°C to 125°CMicrosize Package: SOT23-5Low Dropout Voltage: 10 mVHigh Output Current: ±20 mALow Quiescent Current: 360 µALine Regulation: 3 ppm/VLoad Regulation: 8 ppm/mA
Description
AI
Applications with only a positive supply voltage often require an additional stable voltage in the middle of the analog-to-digital converter (ADC) input range to bias input bipolar signals. The REF19xx 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 REF19xx offers excellent temperature drift (25 ppm/°C, max) and initial accuracy (0.1%) on both the VREFand VBIASoutputs while operating at a quiescent current less than 430 µA. In addition, the VREFand VBIASoutputs 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 VREFand VBIASvoltages 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.
Applications with only a positive supply voltage often require an additional stable voltage in the middle of the analog-to-digital converter (ADC) input range to bias input bipolar signals. The REF19xx 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 REF19xx offers excellent temperature drift (25 ppm/°C, max) and initial accuracy (0.1%) on both the VREFand VBIASoutputs while operating at a quiescent current less than 430 µA. In addition, the VREFand VBIASoutputs 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 VREFand VBIASvoltages 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.
