Datasheet

THERMOPILE
OTP-538U
http://www.orisystech.com
3 / 7
1. General Characteristics
1.1 Absolute Maximum Rating
Table 1: Absolute maximum rating
Parameter Min. Typ. Max. Unit
Ambient Operating Temperature -20 100
℃
Storage Temperature -40 100
℃
1.2 Handling Guidelines
 Stresses above the absolute maximum ratings may cause damages to the device.
 Do not expose the sensor to aggressive detergents such as Freon, Trichloroethylene, etc.
 Avoid touching or cleaning of the window. If necessary, do cleaning only very carefully with alcohol and
cotton swab.
 Hand soldering and wave soldering may be applied by a maximum temperature of 260° C for a dwell time
less than 10 s. Reflow soldering is not recommended.
2. Device Characteristics
2.1 Device Descriptions
The materials of OTP-538U are lead-free and fully complied with the RoHS regulations.
Table 2: Device characteristics
Parameter Description
Cap Metal cap with integrated IR window
Header TO 46
Leads (3 isolated + 1 ground) pins with solderable gold coating
Filter Si-based IR filter
Insulation gas sealing The sensor is sealed hermetically in a nitrogen environment.
2.2 Sensor Characteristics
Table 3: Thermopile sensor characteristics
Parameter Min Typ Max Unit Conditions
Output Voltage 0.77 1.44 mV
T
amb.
=25℃
T
obj.
=50℃
Sensitivity 70 85 100 V/W *
TC of sensitivity 0.10 0.11 0.12 %/K Typical
Sensitivity area in
diameter
--- 545 ---
μm
Resistance of thermopile 50 65 80
KΩ 25℃
TC of resistance --- 0.09 --- %/K Typical
Time constant --- 16 --- ms *
Noise voltage 28 32 36 nV/Hz
1/2
NEP 0.28 0.36 0.48 nW/Hz
1/2
Normalized detectivity (D*) 1.0*10
8
1.3*10
8
1.7*10
8
cm*Hz
1/2
/W *
Notes:
*
All optical performances are measured at 1 Hz chopper frequency using a blackbody
radiator of 500K temperature with filtered spectrum ranging from 5 to 14
μ
m.
Distance between packaged thermopile and blackbody is 11cm.