SD138-11-31-211
Silicon PIN Photodiode Sandwich Detector
The SD138-11-31-211 device features two silicon PIN photodiodes
vertically integrated in a hermetic TO-5 package. The top photodiode absorbs
a portion of the light and the remaining light is transmitted to the bottom
photodiode. The current ratio of the two photodiodes is used to remotely
determine and monitor the color temperature of an object.
The SD138-11-31-211 can find application in dual wavelength power
meters and remote color temperature sensing.
Electro-Optical Characteristics of Top and Bottom Photodiodes
@ +23°, and 0 volt bias unless otherwise specified
Parameter
Conditions
Min
Typ
Max
Units
Active Area Diameter (Top)
3.5
mm
Active Area Diameter (Bottom)
3.1
mm
Spectral Range of (Top)
300 to
1100
nm
Spectral Range of (Bottom)
950 to
1100
nm
Shunt Resistance
Bias: 10 mV
50
200
M
Responsivity (Top)
Wavelength = 950 nm
0.50
0.60
A/W
Responsivity (Bottom)
Wavelength = 1050 nm
0.135
0.155
A/W
Peak NEP ( Top)
Wavelength = 950 nm
12
25
fw/
Hz
Peak NEP (Bottom)
Wavelength = 1050 nm
45
100
fw/
Hz
Capacitance
290
305
pF
Operating Temperature
-55
+100
°C
Storage Temperature
-55
+100
°C
Features
· Large Active Area
· Low Noise
· High Shunt Resistance
· Hermetically Sealed
· High Saturation
Applications
· Dual Wavelength Power
Meters
· Remote Color Temperature
Sensing
API reserves the right to change specifications without notification.
Rev. APRIL 12,
2001
Typical Performance Graphs
MECHANCIAL DIMENSIONS AND PIN-OUT
1240 Avenida Acaso, Camarillo, CA 93012
(805) 987-0146 Fax (805) 484-9935
www.advancedphotonix.com
Typical Spectral Response
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
200
400
600
800
1000
1200
Wavelength (nm)
Responsivity (A/W)
TOP PHOTODIODE
BOTTOM PHOTODIODE
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