Specifications

 
 
Standard curve Curve DT-670

Recommended excitation 10 µA ±0.1%

Max reverse voltage 40 V

Max current before damage 1 mA continuous or 100 mA pulsed

Dissipation at recommended excitation 16 µW at 4.2 K; 10 µW at 77 K; 5 µW at 300 K

Thermal response time SD: typical <10 ms at 4.2 K, 100 ms at 77 K, 200 ms at 305 K;
BR: 1 ms at 4.2 K, 13 ms at 77 K, 20 ms at 305 K

Use in radiation
Recommended for use only in low level radiation – for more information click here

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 – for more informationclick here.

Reproducibility1 ±10 mK at 4.2 K

Soldering standard J-STD-001 Class 2

1 Short-term reproducibility data is obtained by subjecting sensor to repeated thermal shocks from 305 K to 4.2 K
 
Range of Use
PackageMinimum
limit
Maximum limit
SD, CU-HT, BR1.4 K500 K
CU, LR, CY, ET, MT, BO, HR1.4 K420 K
   
Temperature Response Data Table
 DT-670DT-621-HR
 V (volts) dV/dT (mV/K) V (volts) dV/dT (mV/K)
1.4 K 1.64-12.5
4.2 K 1.58-31.61.678-35
10 K 1.38-26.8
77 K 1.03-1.731.03-1.73
305 K 0.560-2.300.560-2.30
Click here for expanded response table
     
 
 
Calibrated Accuracy
 Typical sensor accuracy2
1.4 K ±12 mK
4.2 K ±12 mK
10 K ±12 mK
77 K ±22 mK
300 K ±32 mK
500 K±50 mK
  
2 [(Calibration uncertainty)2 + (reproducibility)2] 0.5 for more information see Appendices B, D, and E
Long-term Stability
 Use to 305 K3Use to 500 K 4
4.2 K ±10 mK±40 mK
77 K ±40 mK±100 mK
305 K ±25 mK±50 mK
500 K ±150 mK
3 Long-term stability data is obtained by subjecting sensor to 200 thermal shocks from 305 K to 77 K
4 Based on 670 h of baking at 500 K
   
Standard Curve DT-670
Tolerance Bands
 2 K to
100 K
100 K to
305 K
305 K to
500 K
Band A ±0.25 K ±0.5 K±0.5 K
Band A1 ±0.25 K±1.5% of temp±1.5% of temp
Band B ±0.5 K±0.5 K±0.33% of temp
Band B1±0.5 K±1.5% of temp±1.5% of temp
Band C ±1 K±1 K±0.50% of temp
    
 30 K to
100 K
100 K to
305 K
305 K to
500 K
Band D5 ±0.25 K ±0.50 K±0.20% of temp
5For T < 30 K ±1.5 K
    
 2 K to
100 K
100 K to
500 K
DT-670E-BR±1.5 K typical±1.5% of temp typical
   
 20 K to 325 K
DT-621-HR ±2.5 K or ±1.5% of temp, whichever is greater
 
    
Physical Specifications
 MassLead
 type
Lead polarity Sensor materials used
DT-670-SD
37 mg2 – nickel and gold plated Kovar Positive lead on right with package lid up and leads towards user Sapphire base with alumina body & lid. Molybdenum/manganese metallization on base and lid top with nickel and gold plating. Gold tin solder as hermetic seal
DT-670E-BR
(bare die)
72.7 µg nonePositive connection made through bottom of chip; negative connection made on base pad on top of chip Silicon chip with aluminum metallization on chip contacts
DT-621-HR
23 mg2 – platinum ribbon with tinned 60/40 SnPb solderPositive lead is right-hand ribbon with platinum disk down and leads towards userSensing element is mounted to a platinum disk and covered with a dome of Stycast® 2850 epoxy
     
Silicon Diode Calibration Ranges
silicon-diode-calibrations
Typical Magnetic Field-Dependent Temperature Errors5 ΔT/T (%) at B (magnetic induction)
Package base parallel to field B
T (K)1 T 2 T3 T4 T5 T
4.2-200-300-350-400-500
20-10-20-25-30-40
40-4-6-8-10-12
60-0.5-1-2-3-3.5
80< 0.1 -0.5-0.8-1.1-1.5
300< -0.1 < -0.1 < -0.1 < -0.1 < -0.1
      
Package base perpendicular to field B
T (K)1 T 2 T3 T4 T5 T
4.2-8-9-11-15-20
20-4-5-5-5-10
40-1.5-3-4-5-5.5
60-0.5-0.7-0.8-1-1.1
80-0.1-0.3-0.5-0.6-0.7
300< 0.1 0.20.50.60.6
5 To minimize magnetic field-induced temperature errors, the sensor should be oriented so that the package base is perpendicular to the magnetic field flux lines - this results in the diode current being parallel to the magnetic field
      
DT-SD
 
DT-BR
 
HR
  
DT-670 Temperature Response Curve Curve DT-670 Tolerance Bands
dt670_ts_responsecurvedt670_ts_tolerance_bands
DT-670 Series Expanded Temperature Response Data Table
T
(K)
Voltage
(V)
dV/dT
(mV/K)
1.41.644290-12.5
1.51.642990-13.6
1.61.641570-14.8
1.71.640030-16.0
1.81.638370-17.1
1.91.636600-18.3
2.01.634720-19.3
2.11.632740-20.3
2.21.630670-21.1
2.31.628520-21.9
2.41.626290-22.6
2.51.624000-23.2
2.61.621660-23.6
2.71.619280-24.0
2.81.616870-24.2
2.91.614450-24.4
3.01.612000-24.7
3.11.609510-25.1
3.21.606970-25.6
3.31.604380-26.2
3.41.601730-26.8
3.51.599020-27.4
3.61.596260-27.9
3.71.59344-28.4
3.81.59057-29.0
3.91.58764-29.6
4.01.58465-30.2
4.21.57848-31.6
4.41.57202-32.9
4.61.56533-34.0
4.81.55845-34.7
5.01.55145-35.2
5.21.54436-35.6
5.41.53721-35.9
5.61.53000-36.2
5.81.52273-36.5
   
T
(K)
Voltage
(V)
dV/dT
(mV/K)
6.01.51541-36.7
6.51.49698-36.9
7.01.47868-36.2
7.51.46086-35.0
8.01.44374-33.4
8.51.42747-31.7
9.01.41207-29.9
9.51.39751-28.3
10.01.38373-26.8
10.51.37065-25.5
11.01.35820-24.3
11.51.34632-23.2
12.01.33499-22.1
12.51.32416-21.2
13.01.31381-20.3
13.51.30390-19.4
14.01.29439-18.6
14.51.28526-17.9
15.01.27645-17.3
15.51.26794-16.8
16.01.25967-16.3
16.51.25161-15.9
17.01.24372-15.6
17.51.23596-15.4
18.01.22830-15.3
18.51.22070-15.2
19.01.21311-15.2
19.51.20548-15.3
20.01.197748-15.6
21.01.181548-17.0
22.01.162797-21.1
23.01.140817-20.8
24.01.125923-9.42
25.01.119448-4.60
26.01.115658-3.19
27.01.112810-2.58
   
T
(K)
Voltage
(V)
dV/dT
(mV/K)
28.01.110421-2.25
29.01.108261-2.08
30.01.106244-1.96
31.01.104324-1.88
32.01.102476-1.82
33.01.100681-1.77
34.01.098930-1.73
35.01.097216-1.70
36.01.095534-1.69
37.01.093878-1.64
38.01.092244-1.62
39.01.090627-1.61
40.01.089024-1.60
42.01.085842-1.59
44.01.082669-1.59
46.01.079492-1.59
48.01.076303-1.60
50.01.073099-1.61
52.01.069881-1.61
54.01.066650-1.62
56.01.063403-1.63
58.01.060141-1.64
60.01.056862-1.64
65.01.048584-1.67
70.01.040183-1.69
75.01.031651-1.72
77.351.027594-1.73
80.01.022984-1.75
85.01.014181-1.77
90.01.005244-1.80
100.00.986974-1.85
110.00.968209-1.90
120.00.949000-1.94
130.00.929390-1.98
140.00.909416-2.01
150.00.889114-2.05
   
T
(K)
Voltage
(V)
dV/dT
(mV/K)
160.00.868518-2.07
170.00.847659-2.10
180.00.826560-2.12
190.00.805242-2.14
200.00.783720-2.16
210.00.762007-2.18
220.00.740115-2.20
230.00.718054-2.21
240.00.695834-2.23
250.00.673462-2.24
260.00.650949-2.26
270.00.628302-2.27
273.00.621141-2.28
280.00.605528-2.28
290.00.582637-2.29
300.00.559639-2.30
310.00.536542-2.31
320.00.513361-2.32
330.00.490106-2.33
340.00.466760-2.34
350.00.443371-2.34
360.00.419960-2.34
370.00.396503-2.35
380.00.373002-2.35
390.00.349453-2.36
400.00.325839-2.36
410.00.302161-2.37
420.00.278416-2.38
430.00.254592-2.39
440.00.230697-2.39
450.00.206758-2.39
460.00.182832-2.39
470.00.159010-2.37
480.00.135480-2.33
490.00.112553-2.25
500.00.090681-2.12