REF6225
- Excellent Temperature Drift Performance
- 3 ppm/°C (max) from 0°C to +70°C
- Extremely Low Noise
- Total Noise: 5 µVRMS With 47-µF Capacitor
- 1/f Noise (0.1 Hz to 10 Hz): 3 µVPP/V
- Integrated ADC Drive Buffer
- Low Output Impedance: < 50 mΩ (0-200 kHz)
- First Sample Precise to 18 Bits With ADS8881
- Enables Burst-Mode DAQ Systems
- Low Supply Current: 820 µA
- Low Shutdown Current: 1 µA
- High Initial Accuracy: ±0.05%
- Very-Low Noise and Distortion
- Output Current Drive: ±4 mA
- Programmable Short-Circuit Current
- Verified to Drive REF Pin of ADS88xx family of SAR ADCs and ADS127xx family of Wideband ΔΣ ADCs
The voltage references in the REF6000 family have an integrated low output impedance buffer that enables the user to directly drive the reference (REF) pin of precision data converters, while preserving linearity, distortion, and noise performance. Most precision SAR and delta-sigma analog-to-digital converters (ADCs), switch binary-weighted capacitors onto the REF pin during the conversion process. In order to support this dynamic load, the output of the voltage reference must be buffered with a low-output impedance, high-bandwidth buffer. The REF6000 family devices are well suited, but not limited, to drive the REF pin of the ADS88xx family of SAR ADCs, and ADS127xx family of delta-sigma ADCs, as well as precision digital-to-analog converters (DACs).
The REF6000 family of is able to maintain an output voltage within 1LSB (18-bit) with minimal droop, even during the first conversion while driving the REF pin of the ADS8881. This feature is useful in burst-mode, event-triggered, equivalent-time sampling, and variable-sampling-rate data-acquisition systems. The REF62xx variants of REF6000 family specify a maximum temperature drift of just 3 ppm/°C and initial accuracy of 0.05% for both the voltage reference and the low output impedance buffer combined. For various temperature drift options in REF6000 family, see the Device Comparison Table.
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 | |
|---|---|---|---|---|---|---|
| * | 資料表 | REF62xx High-Precision Voltage Reference With Integrated ADC Drive Buffer datasheet | PDF | HTML | 2017/7/3 | ||
| 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 | ||||
| 應用說明 | Long-Term Drift in Voltage References | PDF | HTML | 2021/3/25 | |||
| 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 | ||||
| 白皮書 | Voltage-reference impact on total harmonic distortion | 2016/8/1 |
設計與開發
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ADS127L21EVM-PDK — ADS127L21 評估模組，適用於具有易於驅動的輸入和寬頻或低延遲濾波器的 ADC
REF6025EVM-PDK — REF6025 電壓參考評估模組
TIDA-01434 — 適用於 24 位元 ADC 的隔離式、無變壓器、雙極供電參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSSOP (DGK) | 8 | Ultra Librarian |