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 (25ppm/°C, maximum) and initial accuracy (0.1%) on both the VREF and VBIAS outputs while operating at a quiescent current less than 430µA. In addition, the VREF and VBIAS outputs track each other with a precision of 6ppm/°C (maximum) across the temperature range from –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 design. Extremely low dropout voltage of only 10mV 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. Good long-term stability and low-noise levels make these devices designed for high-precision industrial applications.
| Documentación principal | Tipo | Título | Opciones de formato | Descargar la versión más reciente en inglés | Fecha |
|---|---|---|---|---|---|
| * | Hoja de datos | REF19xx Low-Drift, Low-Power, Dual-Output, VREF and VREF / 2 Voltage References datasheet (Rev. B) | PDF | HTML | 23/07/2026 | |
| Nota sobre la aplicación | Voltage Reference Selection and Design Tips For Data Converters (Rev. B) | PDF | HTML | 9/01/2024 | ||
| Libro electrónico | Tips and tricks for designing with voltage references (Rev. A) | 7/05/2021 | |||
| Libro electrónico | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | 28/06/2019 | |||
| Informe | Voltage reference selection basics white paper (Rev. A) | 23/10/2018 |
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| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
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