REF1925
- 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
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.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| 應用說明 | Voltage Reference Selection and Design Tips For Data Converters (Rev. B) | PDF | HTML | 2024/1/9 | |||
| 電子書 | Tips and tricks for designing with voltage references (Rev. A) | 2021/5/7 | ||||
| 電子書 | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | 2019/6/28 | ||||
| 白皮書 | Voltage reference selection basics white paper (Rev. A) | 2018/10/23 |
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