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Product details

Parameters

VO (V) 3.3, 1.65 Initial accuracy (Max) (%) 0.05 Temp coeff (Max) (ppm/ degree C) 8 Rating Catalog Vin (Min) (V) 3.32 Vin (Max) (V) 5.5 Iq (Typ) (uA) 360 Features Multiple outputs, Enable pin Iout/Iz (Max) (mA) 20 Operating temperature range (C) -40 to 125 Shutdown current (Typ) (uA) 3.3 open-in-new Find other Series voltage references

Package | Pins | Size

SOT-23-THN (DDC) 5 8 mm² 2.9 x 2.8 open-in-new Find other Series voltage references

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
  • 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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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.

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Technical documentation

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No results found. Please clear your search and try again. View all 4
Type Title Date
* Datasheet REF20xx Low-Drift, Low-Power, Dual-Output, VREF and VREF / 2 Voltage References datasheet (Rev. D) Jun. 04, 2018
Application notes Voltage Reference Solutions in Motor Control Drives Jul. 29, 2019
More literature Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
Application notes Low-Cost, Low-Power, Small 14-bit AFE: Interleaved ADCs Scalable up to 7.5 MSPS May 26, 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$49.00
Description
The PositionManager BoosterPack is a flexible low voltage platform intended for evaluating interfaces to absolute encoders and analog sensors like resolvers and SinCos transducers.  When combined with the DesignDRIVE Position Manager software solutions this low-cost evaluation module becomes a (...)
Features

Hardware Features

  • 2x channels of RS-485 line interface supporting up to 100m distances
  • 1x SinCos analog interface
  • 2x 20-pin headers/connectors to LaunchPad
  • Capable of supporting 2x absolute encoders simultaneously
  • Works with CLB-enabled C2000 MCUs
  • Hardware Files are in controlSUITE at (...)

Design tools & simulation

SIMULATION MODELS Download
SBOM900.ZIP (35 KB) - PSpice Model
SIMULATION MODELS Download
SBOM901.TSC (21 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOM902.ZIP (8 KB) - TINA-TI Spice Model

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Videos

Interface to Sin/Cos Encoders with High-Res Position Interpolation

Learn more about the TIDA-00176 reference design that is an EMC-compliant industrial interface to Sin/Cos position encoders. Applications include industrial dri

Posted: 25-Jan-2015
Duration: 03:18

Learn more about this reference design

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