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, maximum) 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 (maximum) across the temperature range of –40°C to 125°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.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | REF20xx Low-Drift, Low-Power, Dual-Output, VREF and VREF / 2 Voltage References datasheet (Rev. E) | PDF | HTML | 03 Feb 2022 |
| More literature | Voltage Reference Design Tips For ADC Pairing (Rev. A) | PDF | HTML | 02 Jun 2021 | |
| E-book | Tips and tricks for designing with voltage references (Rev. A) | 07 May 2021 | ||
| More literature | Simplifying Signal Chain Design for High Performance in Small Systems | 22 Oct 2020 | ||
| More literature | Precision Current Sources and Sinks Using Voltage References | 30 Jun 2020 | ||
| More literature | Voltage Reference Solutions in Motor Control Drives | 29 Jul 2019 | ||
| E-book | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | 28 Jun 2019 | ||
| More literature | Voltage reference selection basics white paper (Rev. A) | 23 Oct 2018 |
For additional terms or required resources, click any title below to view the detail page where available.
Speed up your op amp prototyping and testing with the DIP adapter evaluation module (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 (...)
| Package | Pins | Download |
|---|---|---|
| SOT-23-THN (DDC) | 5 | View options |
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