REF1933AIDDCT Part Information

Details for REF1933AIDDCT by Texas Instruments

Electronic & Electrical Components>Semiconductors - ICs>Power Management

Part Description

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 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.

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Part Features

  • Excellent Temperature Drift Performance: u2013 25 ppm/u00b0C (max) from u201340u00b0C to 125u00b0C
  • High Initial Accuracy: u00b10.1% (max)
  • High Output Current: u00b120 mA
  • Line Regulation: 3 ppm/V
  • Load Regulation: 8 ppm/mA
  • Low Dropout Voltage: 10 mV
  • Low Quiescent Current: 360 u03bcA
  • Microsize Package: SOT23-5
  • Two Outputs, VREF and VREF / 2, for Convenient Use in Single-Supply Systems
  • VREF and VBIAS Tracking over Temperature: u2013 6 ppm/u00b0C (max) from u201340u00b0C to 85u00b0C u2013 7 ppm/u00b0C (max) from u201340u00b0C to 125u00b0C

Part Specifications

Voltage Reference Type Series - Fixed
Product Range REF1933 Series
Reference Voltage 3.3V
Initial Accuracy 0.1%
Temperature Coefficient ± 10ppm/°C
Voltage Reference Case Style SOT-23
No. of Pins 5Pins
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL MSL 2 - 1 year
SVHC No SVHC (27-Jun-2018)
Input Voltage Max 5.5V
Input Voltage Min 3.32V
Reference Volts 3.3V
RoHS Compliant

Alternative Part Descriptions

  • VOLTAGE REF, SERIES, 3.3V, SOT-23-5; Voltage Reference Type:Series - Fixed; Product Range:REF1933 Series; Reference Voltage:3.3V; Initial Accuracy:0.1%; Temperature Coefficient:� 10ppm/�C; Voltage Reference Case Style:SOT-23; No. of RoHS Compliant: Yes | Newark Electronics
  • 3.3-V Vref, dual-output Vref & Vref/2 voltage reference | Texas Instruments

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The REF1933AIDDCT is listed under Electronic & Electrical Components > Semiconductors - ICs > Power Management.

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