First Sensor WS PD Data Sheet
Part Description WS7.56 TO
Order # 3001222
Features
Description Application RoHS
2011/65/EU
Absolute maximum ratings
Spectral response (23 °C)
Max
125
100
5
10
Schematic
Electro-optical characteristics @ 23 °C
Unit
µm
mm²
nA
nF
pF
A/W
A/W
µs
µs
MΩ
MΩ
V
• Precision photometry
• Analytical instruments
• Medical equipment
• Wavelength determination for
10
1
Diode 1; VR = 10 mV
2000
IPEAK
Peak DC current
mA
Active area
Min
2750 x 2750
Active area
7.56
Typ
Max
Symbol
Characteristic
Test Condition
• 7.56 mm² wavelength sensitive
detector
• Two stacked p-n-junctions
• Operating range 450 - 950 nm
Symbol
Unit
Min
Wavelength senisitive square active
area PIN photodiode with 7.56 mm²
active area. Metal can type hermetic
TO5(i) package with clear glass
window.
monochromatic light
Parameter
TOP
Operating temp
-40
°C
Vmax
Max reverse voltage
V
TSTG
Storage temp
-55
°C
C
Capacitance
Diode 1; VR = 0 V
1
ID
Dark current
VR = 5 V
10
Diode 2; λ = 890 nm
0.45
Responsivity
Diode 1; λ = 550 nm
tR
Rise time
Diode 1; VR = 0 V; λ = 850 nm; RL = 1 kΩ
Diode 2; VR = 0 V
100
10
Diode 2; VR = 0 V; λ = 850 nm; RL = 1 kΩ
0.2
Shunt Resistance
100
Diode 2; VR = 10 mV
Breakdown voltage
IR = 2 µA
5
VBR
0,00
0,05
0,10
0,15
0,20
0,25
0,30
0,35
0,40
0,45
0,50
400 450 500 550 600 650 700 750 800 850 900 950 1000
Responsivity (A/W)
Wavelength (nm)
Anode 1
Anode 2
Rev. 14/02/2018 subject to change without notice www.first-sensor.com contact@first-sensor.com Page 1/3
First Sensor WS PD Data Sheet First Sensor WS PD Data Sheet
Part Description WS7.56 TO Part Description WS7.56 TO
Order # 3001222 Order # 3001222
Quantum efficiency (23 °C) Dark current as of bias (23 °C)
Special charactertistics:
Application hints:
Handling precautions:
• Soldering temperature max. 260 °C for 10 s. The device must be protected against solder flux vapour.
• Minimum pin length is 2 mm.
• For ESD protection standard precautionary measures are sufficient.
• For further questions please refer to document "Instructions for handling and processing".
The WS7.56 wavelength sensor has two p-n junctions constructed vertically on a common
silicon substrate.
The upper and lower diode have an enhanced blue and red response, respectively. Absorbed
radiation between 450 and 900 nm generates two photocurrents proportional to the
wavelength of the incident light. The quotient of the signals is independent of light level up to
the saturation point. The wavelength of monochromatic light or the spectral density peak of
polychromatic light can therefore be determined.
During photovoltaic operation (Vrev= 0 V) the quotient of
photocurrents from anode 1 and anode 2 is constant for up to 150 µW
irradiated power. This range can be increased to up to 3mW when the
reverse bias is raised. A recomended application circuit is shown to the
right.
0
20
40
60
80
400 450 500 550 600 650 700 750 800 850 900 950 1000
Quantum efficiency (%)
Wavelength (nm)
Anode 1
Anode 2
0,01
0,10
1,00
10,00
0 1 2 3 4 5
Dark current (nA)
Reverse bias (V)
Anode 1
Anode 2
Rev. 14/02/2018 subject to change without notice www.first-sensor.com contact@first-sensor.com Page 2/3
First Sensor WS PD Data Sheet First Sensor WS PD Data Sheet
Part Description WS7.56 TO Part Description WS7.56 TO
Order # 3001222 Order # 3001222
Package dimension:
Small quantities: Foam pad, boxed (12 cm x 16.5 cm)
Disclaimer: Due to our strive for continuous improvement, specifications are subject to change within our PCN policy according to JESD46C.
Order number 3001222, Package: TO5
Rev. 14/02/2018 subject to change without notice www.first-sensor.com contact@first-sensor.com Page 3/3
