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Product details

Parameters

VO (V) 3.3, 1.65 Initial accuracy (Max) (%) 0.1 Temp coeff (Max) (ppm/ degree C) 25 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:
    • 25 ppm/°C (max) from –40°C to 125°C
  • High Initial Accuracy: ±0.1% (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
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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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Technical documentation

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Type Title Date
* Datasheet REF19xx Low-Drift, Low-Power, Dual-Output, VREF and VREF / 2 Voltage References datasheet (Rev. A) Jan. 03, 2017
White papers Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
User guides ADS7056EVM-PDK Quick Start Guide Mar. 09, 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
$199.00
Description
The ADS7056 evaluation module (EVM) performance demonstration kit (PDK) is a platform for evaluating the performance of the ADS7056 successive approximation register (SAR) analog-to-digital converter (ADC), which is a single-ended input, 14-bit, 2.5-MSPS device. The ADS7056EVM-PDK (...)
Features
  • Hardware and software required for diagnostic testing, as well as accurate performance evaluation of ADS7056 SAR ADC
  • USB powered; no external power supply required
  • PHI controller provides convenient communication interface to ADS7056 ADC over a USB 2.0 (or higher) for power delivery, as well as (...)

Design tools & simulation

SIMULATION MODELS Download
SBOM915.ZIP (25 KB) - Spice Model
SIMULATION MODELS Download
SBOM916.ZIP (14 KB) - TINA-TI Reference Design

Reference designs

参考设计 Download
Low-Drift Bidirectional Single-Supply Low-Side Current Sensing Reference Design
TIPD156 This Verified TI Precision Design implements a low-drift, bi-directional, low-side, single-supply current sensing solution that measures load currents from -2.5 A to +2.5 A.  The output range is from 250 mV to 2.75 V, with 0 A current centered at 1.5 V.  To achieve low-drift performance (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOT-23-THIN (DDC) 5 View options

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