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Low-Drift, Low-Power, Dual-Output Vref and Vref/2 Voltage Reference

Availability: 11,109


Package | PIN: SOT-23-THN (DDC) | 5
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $2.97
10-24 $2.67
25-99 $2.49
100-249 $2.18
250-499 $2.05
500-749 $1.74
750-999 $1.47
1,000+ $1.40


  • 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°Cto 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

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Texas Instruments  REF2033AIDDCR

Applications with only a positive supply voltage often require additional stable voltagein 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 secondhighly-accurate voltage (VBIAS) that can be used to bias the input bipolarsignals.

The REF20xx offers excellent temperature drift
(8 ppm/°C, max) and initial accuracy (0.05%) on both the VREF andVBIAS outputs while operating at a quiescent current less than 430 µA. Inaddition, the VREF and VBIAS outputs track each otherwith a precision of 6 ppm/°C (max) across the temperature range of –40°C to 85°C. All thesefeatures increase the precision of the signal chain and decrease board space, while reducing thecost of the system as compared to a discrete solution. Extremely low dropout voltage of only 10 mVallows operation from very low input voltages, which can be very useful in battery-operatedsystems.

Both the VREF and VBIAS voltages have thesame excellent specifications and can sink and source current equally well. Very good long-termstability and low noise levels make these devices ideally-suited for high-precision industrialapplications.