# Temperature Sensor, Voltage, Cryogenic Sensor, Flat, -271.8 °C to 226.85 °C

![Product image](https://novapart.co/image/farnell:3885291/)

**URL**: https://novapart.co/products/CY670D-SD/temperature-sensor-voltage-cryogenic-flat-2718-c
**SKU**: CY670D-SD
**Manufacturer**: OMEGA
**Category**: Sensors & Transducers || Sensors || Temperature Sensors || RTD Temperature Sensors
**Price**: €445.3600
**Stock**: 10+
**Lead Time**: 2 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Product Range | CY670 Series |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3885291/)

## **Cryogenic Temperature Sensors Silicon Diodes** 

## **CY670 Series** 

**CY670A-SD shown smaller than actual size.** 

- U **Best Accuracy Across the Widest Useful Temperature Range, 1.4 to 500 K** 

- U **Tightest Tolerances for Applications from 30 to 500 K** 

- U **Rugged, Reliable SD Package (Designed to Withstand Repeated Thermal Cycling and Minimize Sensor Self-Heating)** 

- U **Conformance to Standard Curve CY670 (Temperature Response Curve Variety of Packaging Options)** 

- U **Bare Die Sensors with the Smallest Size and Fastest Thermal Response Time** 

- U **Non-Magnetic 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. 

## **Specifications** 

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. 

**Standard Curve:** Curve CY670, see chart next page **Recommended Excitation:** 10 µA, ±0.1% **Max Reverse Voltage:** 60V **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 

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3.175<br>CY670-SD (0.125) ø0.381<br>Dimensions: mm (inch)<br>a n ø=diameter (0.015)<br>1.905 0.698<br>(0.075) (0.027)<br>1.080<br>(Approx. 0.042) 19<br>(Approx. 0.75)<br>ee<br>0.102<br>(0.004)<br>General tolerence of ±0.127 (±0.005) unless otherwise noted.<br>CAUTION:  (+) lead connected electrically to external braze ring–<br>take care not to cause a short.<br>**----- End of picture text -----**<br>


**1** 

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CY670E-BR 0.406<br>(0.016)<br>0.102<br>(0.004)<br>Base<br>( – Connection)<br>0.102<br>(0.004)<br>Emitter<br>0.432<br>(No connection)<br>(0.017)<br>Bottom of<br>die collector 0.178<br>( + Connection) (0.007)<br>Dimensions: mm (inch)<br>**----- End of picture text -----**<br>


## **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 **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._ 

|**Range**<br>**of Use**|**Limit**<br>**Min**|**Limit**<br>**Max**|
|---|---|---|
|**CY670-SD**|1.4 K|500 K|
|**CY670E-BR**|1.4 K|500 K|



## **Calibrated Accuracy** 

|**Temperature**|**Typical**<br>**Accuracy**|**Long Term**<br>**Accuracy (*)**|**Temperature Response Data Table**<br>**(Typical for CY670)**<br>**Temperature**<br>**Volts**<br>**dV/dT(mV/K)**<br> 1.4 K<br>1.64<br>-12.5<br>4.2 K<br>1.58<br>- 31.6<br>10 K<br>1.38<br>-26.8<br>77 K<br>1.03<br>-1.73<br>305 K<br>0.560<br>-2.30|**Temperature Response Data Table**<br>**(Typical for CY670)**<br>**Temperature**<br>**Volts**<br>**dV/dT(mV/K)**<br> 1.4 K<br>1.64<br>-12.5<br>4.2 K<br>1.58<br>- 31.6<br>10 K<br>1.38<br>-26.8<br>77 K<br>1.03<br>-1.73<br>305 K<br>0.560<br>-2.30|**Temperature Response Data Table**<br>**(Typical for CY670)**<br>**Temperature**<br>**Volts**<br>**dV/dT(mV/K)**<br> 1.4 K<br>1.64<br>-12.5<br>4.2 K<br>1.58<br>- 31.6<br>10 K<br>1.38<br>-26.8<br>77 K<br>1.03<br>-1.73<br>305 K<br>0.560<br>-2.30|**Temperature Response Data Table**<br>**(Typical for CY670)**<br>**Temperature**<br>**Volts**<br>**dV/dT(mV/K)**<br> 1.4 K<br>1.64<br>-12.5<br>4.2 K<br>1.58<br>- 31.6<br>10 K<br>1.38<br>-26.8<br>77 K<br>1.03<br>-1.73<br>305 K<br>0.560<br>-2.30|
|---|---|---|---|---|---|---|
|1.4 K|±12 mK|—||**Temperature**|**Volts**|**dV/dT(mV/K)**|
|4.2 K|±12 mK|10 mK||1.4 K|1.64|-12.5|
|10 K|±12 mK|—||4.2 K|1.58|- 31.6|
|77 K|±22 mK|40 mK||10 K|1.38|-26.8|
|300 K|±32 mK|25 mK||77 K|1.03|-1.73|
|500 K|±50 mK|—||305 K|0.560|-2.30|



_**(*)** Long term stability data is obtained by subjecting sensor to 200 thermal shocks from 305 to 77 K._ 

## **Tolerance Bands for the CY670 Series Diode Thermometer** 

|**Band**|**Temperature Tolerance at Temperature Range**|**Temperature Tolerance at Temperature Range**|**Temperature Tolerance at Temperature Range**|**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<br>(1.01 to 1.65 K)|
|**C (3)**|±1.0 K|±1.0 K|±1.0 K|±0.5% of T<br>(1.53 to 2.50 K)|
|**D (4)**<br> **(PRT Band)**|±1.5 K|±0.25 K|±0.30 K|±0.1% of T<br>(0.305 to 0.500 K)|
|**E**<br>**(Bare Chip Band)**|±1.0 K|±0.25 K|±0.25% of T<br>(0.25 to 0.76 K)|±0.25% of T<br>(0.76 to 1.25 K)|



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CY670-SD<br>**----- End of picture text -----**<br>


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Accuracy Band Availability<br> 1  2  3  4  —<br>Dimensions: mm (in)<br>3.175<br>(0.125)  ø0.381<br>(0.015)<br>! | | on:<br>(0.075)1.905 1 t (0.027)0.698<br>1+<br>1.080<br>(Approx. 0.042) 19<br>(Approx. 0.75)<br>[ ——<br>| !| |-_<br>0.102<br>— T (0.004)<br>General tolerence of ±0.127 (±0.005) unless otherwise noted.<br>CAUTION:  (+) lead connected electrically to external braze ring–<br>take care not to cause a short.<br>CY670-ET<br>Accuracy Band Availabilityy Band Availability Band Availabilityy<br> 1  2  3  4  —<br>Dimensions: mm (in)<br>0.381 6.096<br>25<br>= (0.015) (0.240)<br>— _ 19.304 =a |<br>(0.760)<br>6-32 threads<br>5.556 0.102 6.096<br>i c y™ t—+ (6'240)<br>© ti<br>General tolerance of 0.127 (+0.005) unless otherwise noted<br>CY670-CU  4-leads<br>Accuracy Band Availability<br> 1  2  3  4  —<br>ø7.950 0.762 Dimensions: mm (in)<br>(ø0.313) (0.030)<br>ø2.946 \ >| |< 914.4<br>(ø0.116) (36.0)<br>ø0.127<br>(ø0.005)<br>I | iz<br>——<br>(0.171)4.343 ¥ i= ><br>+ //<br>36 AWG Quad-LeadTM<br>phosphor-bronze wire<br>(914.4 [36.0] long) /<br>General tolerance of ±0.127 (±0.005) unless otherwise noted<br>**----- End of picture text -----**<br>


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CY670-ET<br>Accuracy Band Availabilityy Band Availability Band Availabilityy<br> 1  2  3  4  —<br>Dimensions: mm (in)<br>**----- End of picture text -----**<br>


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CY670-LR<br>**----- End of picture text -----**<br>


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Accuracy Band Availability<br> 1  2  3  4  —<br>Dimensions: mm (in)<br>F (0.105)2.661 -= |— 3.175 [+0.127] -0.000 (0.125         )+0.005-0.000 0.102<br>(0.004)<br>t t<br>19.304<br>(0.760)<br>= | 0.381 ,<br>(0.015) +<br>General tolerance of ±0.127 (±0.005) Ø 3.099<br>unless otherwise noted (Ø0.122)<br>**----- End of picture text -----**<br>


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CY670-BO<br>Accuracy Band Availability<br> 1  2  3  4  —<br>7.620<br>Dimensions: mm (in) (0.300)<br>3.810<br>ø2.946 (ø0.116) <—| (0.150)  (0.105) 2.667<br>through hole  T e<br>ft<br>Beryllium oxide heat sink chip<br>| 0.38 (0.015)  1OF— (0.350) 8.890 '<br>oe 19.304 |<br>(0.760)  5.207<br>0.102 (0.205)<br>(0.004)<br>|-— a<br>}—— =o<br>General tolerance of ±0.127 (±0.005)unless otherwise noted 3.175 (0.125)  a<br>CY670-MT<br>Accuracy Band Availability<br> 1  2  3  4  —<br>Dimensions: mm (in)<br>**----- End of picture text -----**<br>


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CY670-CO CY670-CY<br>Accuracy Band Availability<br> —  2  3  4  —<br>Accuracy Band Availability<br>ø2.997<br> 1  2  3  4  — (ø0.118)<br>through hole<br>Dimensions: mm (in) (0.312)7.925<br>ø=diameter<br>5.080 ø14.224<br>(0.200) (ø0.560)<br>CO &>)<br>5.080<br>(0.200)<br>ø6.350<br>(ø0.250) Dimensions: mm (in)<br>8.077 ø=diameter<br>4-40 shoulder screw (0.318) 11.252<br>(0.443)<br>2-30 AWG PFA coated stranded copper wire<br>           (914.4 [36] long)<br>a<br>General tolerance of ±0.127 (±0.005) unless otherwise noted<br>General tolerance of ±0.127 (±0.005) 3.810 J<br>unless otherwise noted (0.150)<br>**----- End of picture text -----**<br>


|**To Order**|**To Order**|
|---|---|
|**Model No.**<br>~~Ge~~|**Description**<br>~~Ge~~|
|**CY670A-SD**<br>~~a~~|Cryogenic sensor, flat sensor, band A|
|**CY670B-SD**<br>~~eG~~|Cryogenic sensor, flat sensor, band B<br>~~eG~~|
|**CY670C-SD**<br>~~eG~~<br>~~a C~~|Cryogenic sensor, flat sensor, band C<br>~~eG~~<br>~~C~~|
|**CY670D-SD**<br>~~Ge~~|Cryogenic sensor, flat sensor, band D<br>~~Ge~~|
|**CY670A-CU**<br>~~eG~~|Cryogenic sensor, small copper bobbin, band A<br>~~eG~~|
|**CY670B-CU**<br>~~eG~~<br>~~a C~~|Cryogenic sensor, small copper bobbin, band B<br>~~eG~~<br>~~C~~|
|**CY670C-CU**<br>~~Ge~~|Cryogenic sensor, small copper bobbin, band C<br>~~Ge~~|
|**CY670D-CU**<br>~~eG~~|Cryogenic sensor, small copper bobbin, band D<br>~~eG~~|
|**CY670A-CO**<br>~~eG~~<br>~~a C~~|Cryogenic sensor, clampstyle, band A<br>~~eG~~<br>~~C~~|
|**CY670B-CO**<br>~~Ge~~|Cryogenic sensor, clampstyle, band B<br>~~Ge~~|
|**CY670C-CO**<br>~~eG~~|Cryogenic sensor, clampstyle, band C<br>~~eG~~|
|**CY670D-CO**<br>~~a C~~|Cryogenic sensor, clampstyle, band D<br>~~C~~|
|**CY670A-LR**<br>~~Ge~~|Cryogenic sensor, half rounded cylinder, band A<br>~~Ge~~|
|**CY670B-LR**<br>~~eG~~|Cryogenic sensor, half rounded cylinder, band B<br>~~eG~~|
|**CY670C-LR**<br>~~a C~~|Cryogenic sensor, half rounded cylinder, band C<br>~~C~~|
|**CY670D-LR**<br>~~Ge~~|Cryogenic sensor, half rounded cylinder, band D<br>~~Ge~~|
|**CY670A-CY**<br>~~eG~~|Cryogenic sensor, large copper bobbin, band A<br>~~eG~~|
|**CY670B-CY**<br>~~a C~~|Cryogenic sensor, large copper bobbin, band B<br>~~C~~|
|**CY670C-CY**<br>~~Ge~~|Cryogenic sensor, large copper bobbin, band C<br>~~Ge~~|
|**CY670D-CY**<br>~~eG~~|Cryogenic sensor, large copper bobbin, band D<br>~~eG~~|
|**CY670A-ET**<br>~~a C~~|Cryogenic sensor, screw in, band A<br>~~C~~|
|**CY670B-ET**<br>~~Ge~~|Cryogenic sensor, screw in, band B<br>~~Ge~~|
|**CY670C-ET**<br>~~eG~~|Cryogenic sensor, screw in, band C<br>~~eG~~|
|**CY670D-ET**<br>~~a C~~|Cryogenic sensor, screw in, band D<br>~~C~~|
|**CY670A-MT**<br>~~Ge~~|Cryogenic sensor, metric screw in, band A<br>~~Ge~~|
|**CY670B-MT**<br>~~eG~~|Cryogenic sensor, metric screw in, band B<br>~~eG~~|
|**CY670C-MT**<br>~~a C~~|Cryogenic sensor, metric screw in, band C<br>~~C~~|
|**CY670D-MT**<br>~~Ge~~|Cryogenic sensor, metric screw in, band D<br>~~Ge~~|
|**CY670A-BO**<br>~~eG~~|Beryllium oxide heat sink block, band A<br>~~eG~~|
|**CY670B-BO**<br>~~a C~~|Beryllium oxide heat sink block, band B<br>~~C~~|
|**CY670C-BO**<br>~~Ge~~|Beryllium oxide heat sink block, band C<br>~~Ge~~|
|**CY670D-BO**<br>~~eG~~|Beryllium oxide heat sink block, band D<br>~~eG~~|
|**CYC670E-BR-10**<br>~~Cf~~|Cryogenic sensor, bare ship, package of 10<br>~~Cf~~|



_**Ordering Examples: CY670A-SD,** cryogenic sensor._ 

_**CY670B-CU,** cyrogenic sensor, small copper bobbin, band B._ 

**4** 



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