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REF81

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具有 0.05ppm/°C 漂移和 <1ppm 穩定性的溫度控制埋入式稽納參考

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REF81

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Rating Catalog VO (V) 2.5, 4.096, 5, 8.192, 10 Temp coeff (max) (ppm/°C) 0.2 Features Buried Zener diode, Integrated heater Vin (min) (V) 10 Vin (max) (V) 16.5 Iq (typ) (mA) 17 LFN 0.1 to 10 Hz (typ) (µVPP) 0.825 Operating temperature range (°C) 0 to 70
Rating Catalog VO (V) 2.5, 4.096, 5, 8.192, 10 Temp coeff (max) (ppm/°C) 0.2 Features Buried Zener diode, Integrated heater Vin (min) (V) 10 Vin (max) (V) 16.5 Iq (typ) (mA) 17 LFN 0.1 to 10 Hz (typ) (µVPP) 0.825 Operating temperature range (°C) 0 to 70
LCCC (NAJ) 20 79.0321 mm² 8.89 x 8.89
  • 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) : 0.15ppmpk-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)
  • 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) : 0.15ppmpk-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 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, critical for applications that demand a longer operational window without calibration. The package also offers excellent immunity against humidity variation.

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 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, critical for applications that demand a longer operational window without calibration. The package also offers excellent immunity against humidity variation.
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* Data sheet REF81 Temperature Controlled Precision Voltage Reference with 0.05ppm/°C Temperature Drift and < 1ppm Stability datasheet PDF | HTML 2025年 7月 29日

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REF81EVM — REF81 evaluation module

The REF81EVM is a precision voltage reference evaluation module that demonstrates the performance of high precision series reference device (REF81) and its internal heater. The REF81 is a family of low drift and low noise buried zener and nternal heater compensated voltage reference devices which (...)
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REF81-DESIGN-TOOL — REF81 datasheet and EVM

Temperature Controlled Precision Voltage Reference with 0.05ppm/°C Temperature Drift and < 1ppm Stability
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REF81 — 具有 0.05ppm/°C 漂移和 <1ppm 穩定性的溫度控制埋入式稽納參考
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PSpice® for TI 是有助於評估類比電路功能的設計和模擬環境。這款全功能設計和模擬套件使用 Cadence® 的類比分析引擎。PSpice for TI 包括業界最大的模型庫之一，涵蓋我們的類比和電源產品組合，以及特定類比行為模型，且使用無需支付費用。

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TIDA-010970 — 低雜訊、高線性、類比前端參考設計

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。
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LCCC (NAJ) 20 Ultra Librarian
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