Cryogenic Temperature Sensors - Silicon Diodes

CY670 Series

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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

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Descrição

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.

Calibrated Accuracy

Temperature Response Data Table (typical for CY670)

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

Tolerance Bands for the CY670 Series Diode Thermometer

Band	Temperature Tolerance at Temperature Range
Band	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)

Manuais:

Baixar CY670 Series - Temperature Sensors Application Notes

Baixar CY670 Series - Silicon Diode Standard Curve Technical Data