C30902E, C30902S, C30921E, C30921S
Electrical Characteristics1 at T = 22°C
A
C30902E, C309021E
Min Typ Max
C30902S, C30921S
Min
Typ
Max
Units
Breakdown voltage, VBR
Temperature Coefficient of
-225
-
-225
-
-
V
V
for Constant Gain
0.5
-150
0.7
0.8
-250
0.5
0.7
0.8
V/°C
R
Gain
-
Responsivity:
At
At
900
830
nm
nm
55
70
65
77
-92
-117
108
128
- A/W
- A/W
Quantum Efficiency:
At
At
900
830
nm
nm
-60
-77
-
-
-60
-77
-
-
%
%
-8
Dark Current, Id
-
1.5x10-8
3x10-8
-1x10
3x10-8
A
(Figure 6)
(Figure 6)
2
Noise Current, in:
-13
f = 10 kHz, ∆f = 1.0 Hz
-
2.3x10-13 5x10-13
-1.1x10
2x10-13
A/Hz1/2
(Figure 3)
(Figure 3)
Capacitance, Cd
Rise Time, tr:
-1.6
2
-1.6
2
pF
R = 50Ω, λ = 830 nm,
L
10%
to
90%
points
points
-0.5
0.75
0.75
-0.5
0.75
0.75
ns
ns
Fall Time:
R = 50Ω, λ = 830 nm,
L
90%
to
10%
-0.5
cps
ns
-0.5
Geiger Mode (See Appendix)
Dark Count Rate at 5% Photon
Detection Probability 3 (830 nm):
22°C
--- 15-,000 30,000
3-50
cps
-
25°C
-
---
700
Voltage Above V
for 5% Photon
BR
Detection Probability 3
(830 nm) (See Figure 8)
Dead-Time Per Event
(See Appendix)
-
-
-
2
-
V
---
3-00
-
After-Pulse Ratio at 5% Photon
Detection Probability (830 nm)
22°C 4
-
-
-
-
2
15
%
Note 1. At the DC reverse operating voltage V supplied with the device and a light spot diameter of 0.25 mm (C30902E, S) or 0.10 mm (C30921E, S). Note that a specific value
R
of V is supplied with each device. When the photodiode is operated at this voltage, the device will meet the electrical characteristic limits shown above. The voltage value will be
R
within the range of 180 to 250 volts.
2
1/2
+ P RM) F) B )
Note 2. The theoretical expression for shot noise current in an avalanche photodiode is i = (2q (I + (I
M
where q is the electronic charge, I is the dark
ds
w
n
ds db
o
w
surface current, I is the dark bulk current, F is the excess noise factor, M is the gain, P is the optical power on the device, and B , is the noise bandwidth. For these devices F =
db
o
0.98 (2-1/M) + 0.02 M. (Reference: PP Webb, RJ McIntyre, JJ Conradi, "RCA Review", Vol. 35 p. 234, (1974)).
Note 3. The C30902S and C30921S can be operated at a substantially higher Detection Probabilities. See Appendix.
Note 4. After-Pulse occurring 1 microsecond to 60 seconds after main pulse.
PERKINELMER [ PERKINELMER OPTOELECTRONICS ]
