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Cryogenic Temperature Sensors - Silicon Diodes
CY670 Series
PLACE ORDER - Best Accuracy Across the Widest Useful Temperature Range, 1.4 to 500 K
- Tightest Tolerances for Applications from 30 to 500 K
- Rugged, Reliable SD Package (Designed to Withstand Repeated Thermal Cycling and Minimize Sensor Self-Heating)
- Conformance to Standard Curve CY670 (Temperature Response Curve Variety of Packaging Options)
- Bare Die Sensors with the Smallest Size and Fastest Thermal Response Time
- Non-Magnetic Sensor
Description
Description
The CY670 Series silicon diodesoffer a more accurate reading oftemperature ranges compared topreviously marketed silicone diodes.Conforming to the curve CY670standard voltage vs. temperatureresponse curve, sensors within theCY670 Series are interchangeable,and for many applications they donot require individual calibration.CY670 Series sensors in the SDpackage are available in 5 tolerancebands–3 for general cryogenic useacross the 1.4 to 500 K temperaturerange, and 1 that offers superioraccuracy for applications from 30 Kto room temperature. The CY670Series sensors also come in a tolerance band (E), whichis available only as a baredie. For applicationsrequiring greater accuracy,CY670-SD diodes areavailable with calibrationacross the full 1.4 to 500 Ktemperature range.
The CY670E bare die sensorprovides the smallest physical sizeand fastest thermal response timeof any silicon diode on the markettoday. This is an importantadvantage for applications wheresize and thermal response time arecritical, including focal plane arraysand high temperaturesuperconducting filters for cellularcommunication.
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) | |
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