REF2033AIDDCT

REF2033AIDDCT  Describe

Applications with only a positive supply voltage typically require an additional regulated voltage in the middle of the analog-to-digital converter (ADC) input range to bias the input bipolar signal. The REF20xx provides a reference voltage (VREF) that can be used by the ADC and a high precision voltage (VBIAS) that can be used to bias the input bipolar signal.

The REF20xx features excellent temperature drift (8 ppm/°C max) and initial accuracy (0.05%) on the VREF and VBIAS outputs while maintaining a quiescent operating current of less than 430µA. Additionally, the VREF and VBIAS outputs track each other with an accuracy of 6 ppm/°C (max) over the temperature range of –40°C to 85°C. All of these features increase the accuracy of the signal chain, save board space, and reduce system cost compared to discrete solutions. An ultra-low dropout voltage of only 10mV allows the device to operate from very low input voltages, which is ideal for battery-powered systems.

The VREF and VBIAS voltages have equally good specifications and are equally capable of sinking and sourcing current. These devices feature excellent long-term stability and low noise levels, making them ideal for high-precision industrial applications.

Applications with only a positive supply voltage typically require an additional regulated voltage in the middle of the analog-to-digital converter (ADC) input range to bias the input bipolar signal. The REF20xx provides a reference voltage (VREF) that can be used by the ADC and a high precision voltage (VBIAS) that can be used to bias the input bipolar signal.

The REF20xx features excellent temperature drift (8 ppm/°C max) and initial accuracy (0.05%) on the VREF and VBIAS outputs while maintaining a quiescent operating current of less than 430µA. Additionally, the VREF and VBIAS outputs track each other with an accuracy of 6 ppm/°C (max) over the temperature range of –40°C to 85°C. All of these features increase the accuracy of the signal chain, save board space, and reduce system cost compared to discrete solutions. An ultra-low dropout voltage of only 10mV allows the device to operate from very low input voltages, which is ideal for battery-powered systems.

The VREF and VBIAS voltages have equally good specifications and are equally capable of sinking and sourcing current. These devices feature excellent long-term stability and low noise levels, making them ideal for high-precision industrial applications.

REF2033AIDDCT  Feature

• Two Outputs: VREF and VREF/2 for Easy Use in Single-Supply Systems

• Excellent temperature drift performance: 1500

• 8 ppm/°C (maximum) at -40°C to 125°C

• High initial accuracy: ±0.05% (maximum)

• VREF and VBIAS Tracking Over Temperature:

• 6 ppm/°C (maximum) at -40°C to 85°C

• 7 ppm/°C (maximum) at -40°C to 125°C

• Micro package: SOT23-5

• Low Dropout Voltage: 10mV

• High Output Current: ±20mA

• Low Quiescent Current: 360µA

• Line Regulation: 3 ppm/V

• Load Regulation: 8 ppm/mA

• Matte-Sn version (REF2025AISDDCR) with improved corrosion resistance in Battelle Class III and similar harsh environments