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    Cryogenic Silicon Diode Temperature Sensor

    Output per the standard CY670 curve, used to measure temperatures between 30 and 500K (-243 to 227°C). Multiple accuracies available.
    $1,478.68
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    Data Sheet (PDF)

    Cryogenic Silicon Diode Temperature Sensor
    The CY670 Series silicon diodes offer a more accurate reading of temperature ranges compared to previously marketed silicone diodes. Conforming to the curve CY670 standard voltage vs. temperature response curve, sensors within the CY670 Series are interchangeable, and for many applications they do not require individual calibration. CY670 Series sensors in the SD package are available in 5 tolerance bands–3 for general cryogenic use across the 1.4 to 500 K temperature range, and 1 that offers superior accuracy for applications from 30 K to room temperature. The CY670 Series sensors also come in a tolerance band (E), which is available only as a bare die. For applications requiring greater accuracy, CY670-SD diodes are available with calibration across the full 1.4 to 500 K temperature range.
    The CY670E bare die sensor provides the smallest physical size and fastest thermal response time of any silicon diode on the market today. This is an important advantage for applications where size and thermal response time are critical, including focal plane arrays and high temperature superconducting filters for cellular communication.

    SPECIFICATIONS
    Standard Curve: Curve CY670, see chart next page
    Recommended Excitation: 10 µA, ±0.1%
    Max Reverse Voltage: 60 V
    Max Current Before Damage: 1 mA, continuous or 100 mA, pulsed
    Dissipation at Recommended Excitation: 16 µW @ 4.2 K; 10 µW @ 77 K; 5 µW @ 300 K
    Thermal Response Time: SD Model: Typical <10 ms @ 4.2 K, 100 ms @ 77 K, 200 ms @ 305 K
    BR Model: 1 ms @ 4.2 K, 13 ms @ 77 K, 20 ms @ 305 K
    Use in Radiation: Recommended for use only in low level radiation
    Range of Use Limit Min Limit Max
    CY670-SD 1.4 K 500 K
    CY670E-BR 1.4 K 500 K

    Use in Magnetic Field: Not recommended for use in magnetic field applications below 60 K; low magnetic field dependence when used in fields up to 5 tesla above 60 K
    Reproducibility(*): ±10 mK @ 4.2 K
    (*) Short-term reproducibility data is obtained by subjecting sensor to repeated thermal shocks from 305 to 4.2 K.

    Temperature Typical
    Accuracy    		 Long Term
    Accuracy (*)
    1.4 K ±12 mK —
    4.2 K ±12 mK 10 mK
    10 K ±12 mK —
    77 K ±22 mK 40 mK
    300 K ±32 mK 25 mK
    500 K ±50 mK —
    Temperature Volts dV/dT (mV/K)
    1.4 K 1.64 -12.5
    4.2 K 1.58 - 31.6
    10 K 1.38 -26.8
    77 K 1.03 -1.73
    305 K 0.560 -2.30
    Band Temperature Tolerance at Temperature Range
    2 to 30 K 30 to 100 K 100 to 305 K 305 to 500 K
    A (1) ±0.25 K ±0.25 K ±0.50 K ±0.50 K
    B (2) ±0.50 K ±0.50 K ±0.50 K ±0.33% of T
    (1.01 to 1.65 K)
    C (3) ±1.0 K ±1.0 K ±1.0 K ±0.5% of T
    (1.53 to 2.50 K)
    D (4)
    (PRT Band)         		±1.5 K ±0.25 K ±0.30 K ±0.1% of T
    (0.305 to 0.500 K)
    E
    (Bare Chip Band)    		 ±1.0 K ±0.25 K ±0.25% of T
    (0.25 to 0.76 K)     		±0.25% of T
    (0.76 to 1.25 K)