3.3-V Vref, low-drift, low-power, dual-output Vref & Vref/2 voltage reference
Product details
Parameters
Package | Pins | Size
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.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | REF20xx Low-Drift, Low-Power, Dual-Output, VREF and VREF / 2 Voltage References datasheet (Rev. D) | Jun. 04, 2018 |
Application note | Voltage Reference Solutions in Motor Control Drives | Jul. 29, 2019 | |
E-book | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | Jun. 28, 2019 | |
Application note | 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
Description
Speed up your op amp prototyping and testing with the DIP-Adapter-EVM, which provides a fast, easy and inexpensive way to interface with small, surface-mount ICs. You can connect any supported op amp using the included Samtec terminal strips or wire them directly to existing circuits.
The (...)
Features
- Simplifies prototyping of SMT IC’s
- Supports 6 common package types
- Low Cost
Description
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
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Reference designs
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SOT-23-THIN (DDC) | 5 | View options |
Ordering & quality
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Support & training
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