Omega Products CY670A-CO User Manual
T-3
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.
General tolerence of ±0.127 (±0.005) unless otherwise noted.
Approx.
0.042
(1.080)
20.066
(0.790)
0.102
(0.004)
3.175
(0.125)
ø0.381
(0.015)
0.075
(1.905)
0.027
(0.698)
⻬ Best Accuracy Across
the Widest Useful
Temperature Range,
1.4 to 500 K
⻬ Tightest Tolerances
for Applications from
30 to 500 K
⻬ Rugged, Reliable
SD Package (Designed
to Withstand Repeated
Thermal Cycling and
Minimize Sensor
Self-Heating)
⻬ Conformance to
Standard Curve CY670
(Temperature Response
Curve Variety of
Packaging Options)
⻬ Bare Die Sensors with
the Smallest Size and
Fastest Thermal
Response Time
⻬ 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
Specifications
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
CY670A-SD, $575,
shown smaller
than actual size.
Dimensions: mm (in)
ø=diameter
CY670-SD
Cryogenic
Temperature Sensors
Silicon Diodes
CY670 Series
Starts at
$
220
T-4
T
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.
Dimensions: mm (in)
Range Limit Limit
of Use Min Max
CY670-SD 1.4 K 500 K
CY670E-BR 1.4 K 500 K
Typical Long Term
Temperature Accuracy 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 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) ±1.5 K ±0.25 K ±0.30 K ±0.1% of T
(PRT Band) (0.305 to 0.500 K)
E ±1.0 K ±0.25 K ±0.25% of T ±0.25% of T
(Bare Chip Band) (0.25 to 0.76 K) (0.76 to 1.25 K)
Calibrated Accuracy
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
Temperature Response Data Table
(Typical for CY670)
Tolerance Bands for the CY670 Series Diode Thermometer
(*) Long term stability data is obtained by subjecting sensor
to 200 thermal shocks from 305 to 77 K.
Model No. Price Description
MA-2024 $110 Reference Book: Concise Handbook of Mathematics and Physics
Accessories
CY670E-BR
0.432
(0.017)
Bottom of
die collector
( + Connection)
0.102
(0.004)
0.406
(0.016)
0.102
(0.004)
Base
( – Connection)
Emitter
(No connection)
0.178
(0.007)
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