s9038 Hamamatsu Photonics, K.K.,, s9038 Datasheet - Page 8

• Manufacturer Part Number: s9038
• Description: Ccd Image Sensor
• Manufacturer: Hamamatsu Photonics, K.K.,

8
A chip thermistor is built in the same package with a CCD chip, and the CCD chip temperature can be monitored with it. A relation
between the thermistor resistance and absolute temperature is expressed by the following equation.
R1 = R2 × expB (1 / T1 - 1 / T2)
The characteristics of the thermistor used are as follows.
Internal resistance
Maximum current *
Maximum voltage
M axim um heat absorption *
Maximum temperature
of heat radiating side
*8: Maximum current Imax:
*9: Temperature of the cooling side of thermoelectric cooler.
*10: Temperature of the heat radiating side of thermoelectric cooler.
*11: Maximum heat absorption Qmax.
where R1 is the resistance at absolute temperature T1 (K)
R2 is the resistance at absolute temperature T2 (K)
B is so-called the B constant (K)
R (298K) = 10 k
B (298K / 323K) = 3450 K
Specifications of built-in temperature sensor
Specifications of built-in TE-cooler (Typ.)
If the current greater than this value flows into the thermoelectric cooler, the heat absorption begins to decrease due to the
Joule heat. It should be noted that this value is not the damage threshold value. To protect the thermoelectric cooler and
maintain stable operation, the supply current should be less than 60 % of this maximum current.
This is a theoretical heat absorption level that offsets the temperature difference in the thermoelectric cooler when the
maximum current is supplied to the unit.
Parameter
7
6
5
4
3
2
1
0
0
VOLTAGE vs. CURRENT
CCD TEMPERATURE vs. CURRENT
8
0.5
S9038-0902S
11
CURRENT (A)
Symbol
Vmax Tc *
Qmax
Imax
1.0
Rint
-
Ta=25 °C
Tc *
(Typ. Ta=25 ˚C)
1.5
9
9
=Th *
=Th *
Condition
2.0
KMPDB0178EA
30
20
10
0
-10
-20
-30
-40
10
10
=25 °C
=25 °C
CCD image sensor
S9038-0902
2.5
1.5
3.8
3.4
70
7
6
5
4
3
2
1
0
0
S9037/S9038 series
100 k
10 k
1 M
VOLTAGE vs. CURRENT
CCD TEMPERATURE vs. CURRENT
220
1
S9038-1002S
CURRENT (A)
240
TEMPERATURE (K)
2
S9038-1002
260
1.2
3.0
3.6
5.1
70
(Typ. Ta=25 ˚C)
3
(Typ. Ta=25 ˚C)
280
KMPDB0179EA
4
30
20
10
0
-10
-20
-30
-40
300
KMPDB0111EA
Unit
°C
W
A
V