REF81
- Buried zener core 7.6V output
- Industry standard fixed output
voltage
- 1X gain: 2.5V, 4.096V, 5V
- 2X gain: 5V, 8.192V, 10V
- No external buffer for 1X and 2X gain output
- Industry standard fixed output
initial accuracy
- 1X gain: ±0.05%
- 2X gain: ±0.1%
- Ultra-low temperature drift: 0.05ppm/°C
- Operating temperature range: 0°C to 70°C
- Excellent long term stability: 0.3ppm (1khr to 5khr)
- 1/f noise (0.1Hz to 10Hz) : 0.12ppmpk-pk
- Integrated heater with temperature stable indicator
- Input Voltage range: 10V to 16.5V
- Heater supply range: 10V to 42V
- Hermetically sealed ceramic package (20-pin LCCC)
The REF81 device utilizes precision buried zener core with integrated heater to generate stable 7.6V. The device further integrates precision resistor dividers and a buffer to offer industry standard voltage references to drive precision data converters. Integrated temperature control with an internal heater enables the reference voltage to stay constant irrespective of ambient temperature variations and achieve extremely low temperature drift of 0.05ppm/°C. The integration of control loop, precision resistances, and buffer enables ease of design and eliminates need of external precision components.
The REF81 family is available in a 20-pin LCCC package. The LCCC package is a hermetically sealed ceramic package that enables ultra low long-term stability specification of 1ppm, which is critical for applications that demand a longer operational window without calibration. The package also offers excellent immunity against humidity variation.
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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 | REF81 Temperature Controlled Precision Voltage Reference with 0.05ppm/°C Temperature Drift and < 1ppm Stability datasheet (Rev. A) | PDF | HTML | 2026/7/10 | ||
| 技術文章 | The benefits of extreme precision from buried Zener technology in calibration (Rev. B) | PDF | HTML | 2025/9/26 |
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)。
TIDA-010970 — 低雜訊、高線性數位萬用表及資料擷取訊號鏈參考設計
此設計的目標應用包括需要超高精密度以測量 DC 訊號的數位萬用表 (DMM)。此設計採用 ADS127L21B，這是一款高性能 24 位元類比數位轉換器 (ADC)，具有良好的線性度，進而實現了有效的 DC 準確度。REF81 是一款超低漂移埋入式稽納參考二極體，用於校準訊號鏈，以消除增益和偏移誤差。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| LCCC (NAJ) | 20 | Ultra Librarian |