REF70
- Low noise enables precision measurements:
- 1/f Noise (0.1 Hz to 10 Hz): 0.23 ppm p-p
- 10 Hz to 1 kHz: 0.35 ppm rms
- Low temperature drift coefficient:
- 2 ppm/°C maximum (-40°C to 125°C)
- High accuracy: ±0.025% maximum
- Humidity resistant hermetic ceramic package (LCCC)
- Excellent long-term stability (1k hr): 35 ppm
- Low dropout: 400 mV
- Designed for a wide range of applications:
- Wide input voltage up to 18 V
- Output current: ±10 mA
- Voltage options: 1.25 V, 2.5 V, 3 V, 3.3 V, 4.096 V, 5 V
- Ultra-flexible solution:
- Stable with 1-µF to 100-µF output low-ESR capacitor
- High PSRR: 107 dB at 1 kHz
- Operating temperature range: −40°C to +125°C
The REF70 is a family of high precision series voltage references that offers the industry’s lowest noise (0.23 ppm p-p), very low temperature drift coefficient (2 ppm/°C), and high accuracy (±0.025%). The REF70 offers a high PSRR, low drop-out voltage and excellent load and line regulation to help meet strict transient requirements. This combination of precision and features is designed for applications such as test and measurement that demand a precise reference to be paired with precision, high-resolution data converters such as ADS8900B, ADS127L01 and DAC11001A, to achieve optimal performance in the signal chain. The REF70 is also designed for noise-sensitive medical applications such as ultrasound and X-ray to help enable low-noise measurements from the analog front end.
The REF70 family is available in VSSOP and LCCC package options. The LCCC (FKH) package is a hermetically sealed ceramic package that allows for low, long-term drift for applications that require a stable reference over a long time period without calibration.
The REF70 is specified for the wide temperature range of −40°C to +125°C. The wide temperature range enables operation across various 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 | |
|---|---|---|---|---|---|---|
| * | 資料表 | REF70 2 ppm/°C Maximum Drift, 0.23 ppmp-p 1/f Noise, Precision Voltage Reference datasheet (Rev. G) | PDF | HTML | 2023/9/27 | ||
| 白皮書 | 以低雜訊電源裝置簡化電源架構 (Rev. A) | PDF | HTML | Download English Version (Rev.A) | PDF | HTML | 2024/11/19 | |
| 技術文章 | 選擇低雜訊電壓參考以提升 X 光影像解析度 | PDF | HTML | Download English Version | PDF | HTML | 2024/1/22 | |
| 應用說明 | Voltage Reference Selection and Design Tips For Data Converters (Rev. B) | PDF | HTML | 2024/1/9 | |||
| 白皮書 | 簡化高壓系統的電源轉換 | PDF | HTML | Download English Version | PDF | HTML | 2023/11/10 | |
| 電子書 | Tips and tricks for designing with voltage references (Rev. A) | 2021/5/7 | ||||
| 技術文章 | How to design an accurate DC power supply | PDF | HTML | 2021/4/8 | |||
| 應用說明 | Long-Term Drift in Voltage References | PDF | HTML | 2021/3/25 | |||
| 應用說明 | Low-Noise Negative Reference Design with REF5025 | 2019/12/1 | ||||
| 白皮書 | Voltage reference selection basics white paper (Rev. A) | 2018/10/23 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
REF70EVM — 具低雜訊和低漂移，且適用超高精密度電壓參考的 REF70 評估模組
REF70 評估模組 (EVM) 是用於評估具超低雜訊、高精密度電壓參考的 REF70 的平台。REF70 在運作期間可提供 0.23 ppmp-p 的超低 1/f 雜訊，並可在 2 ppm/°C 的溫度漂移下維持極精確電壓輸出。REF70EVM 支援 REF70 系列及其封裝選項變體的預設配置。
如需詳細資訊和其他配置，請參閱 REF70 產品規格表。
ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.
TIDA-010945 — 整合式低漂移精密數位萬用表和資料擷取訊號鏈參考設計
此參考設計說明用於 DC 量測之高性能訊號鏈的理論、設計與測試。主要目標應用是數位萬用表 (DMM)，但此設計也適用於其他應用，例如資料擷取 (DAQ) 和狀況監控。此設計使用高性能 24 位元類比轉數位轉換器 ADS127L21，以及低雜訊可編程增益放大器 PGA855，並具備 ±2.4ppm 的典型非線性與低溫度致漂移，進而實現高 DC 準確度。這些裝置皆高度整合，可簡化整體訊號鏈設計。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSSOP (DGK) | 8 | Ultra Librarian |
| LCCC (FKH) | 8 | Ultra Librarian |