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C30902BH Datasheet Preview

C30902BH Datasheet

High-speed solid state detectors

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C30902BH pdf
DATASHEET
Photon Detection
C30902 and C30921 Series
High-speed solid state detectors for low light level applications
The C30902EH series of avalanche photodiodes is ideal for a wide range of applications,
including LIDAR, range-finding, small-signal fluorescence, photon counting and bar code
scanning.
Excelitas Technologies’ C30902EH series of avalanche photodiodes is fabricated
with a double-diffused “reach-through” structure. This structure provides high
responsivity between 400 and 1000 nm as well as extremely fast rise and fall times
at all wavelengths. The responsivity of the device is independent of modulation
frequency up to about 800 MHz. The detector chip is hermetically-sealed behind a
flat glass window in a modified TO-18 package. The useful diameter of the
photosensitive surface is 0.5 mm.
The C30921EH is packaged in a lightpipe TO-18 which allows efficient coupling of
light to the detector from either a focused spot or an optical fiber up to 0.25 mm in
diameter. The hermetically-sealed TO-18 package allows fibers to be mated to the
end of the lightpipe to minimize signal losses without fear of endangering detector
stability. The C30902EH-2 or C30902SH-2, with hermetic TO-18 package with inline
905nm passband filter and the C30902BH, with hermetic ball lens, complete the
C30902 family.
Key Features
High quantum efficiency: 77%
typical at 830 nm
C30902SH and C30921SH can be
operated in Geiger mode
C30902EH/SH-2 version with
built-in 905 nm filter
C30902BH version with ball-lens
Hermetically sealed package
Low Noise at room temperature
High responsivity internal
avalanche gains in excess of 150
Spectral response range
(10% Q.E. points) 400 to 1000 nm
Time response typically 0.5 ns
Wide operating temperature
range -40°C to +70°C
RoHS compliant
Applications
LIDAR
Range finding
Small-signal fluorescence
Photon counting
Bar code scanning
Both C30902SH and C30921SH are selected C30902EH and C30921EH photodiodes
having extremely low noise and bulk dark-current. They are intended for ultra-low
light level applications (optical power less than 1 pW) and can be used in either
their normal linear mode (Vr < Vbr) at gains up to 250 or greater, or as photon
counters in the “Geiger” mode (Vr > Vbr) where a single photoelectron may trigger
an avalanche pulse of about 108 carriers. In this mode, no amplifiers are necessary
and single-photon detection probabilities of up to approximately 50% are possible.
Photon-counting is also advantageous where gating and coincidence techniques are
employed for signal retrieval.
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Excelitas
Excelitas

C30902BH Datasheet Preview

C30902BH Datasheet

High-speed solid state detectors

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C30902BH pdf
C30902 and C30921 Series
High-speed solid state detectors for low light level applications
Table 1. Electro-optical Characteristics
Test conditions: Case temperature = 22˚C, unless otherwise specification, see notes on next page.
Detector Type
Parameter
Photosensitive area
active diameter
active area
Lightpipe characteristics (C30921)
Numerical aperture of light pipe
Index of refraction (n) of core
Core diameter
Field of view α (see Figure 15)
with standard/ball lens window
(-2) with built-in 905 nm filter
with lightpipe (in air)
Field of view α’ (see Figure 15)
with standard window/ball lens
(-2) with built-in 905 nm filter
Breakdown voltage, Vbr
Temperature coefficient of reverse bias,
Vr, voltage for constant gain
Detector Temperature (see note 2)
-TC
-DTC
Gain (see note 1)
Responsivity
at 830 nm (not applicable for -2)
at 900 nm
Quantum efficiency
at 830 nm (not applicable for -2)
at 900 nm
Dark current, id
-TC (at 0 °C)
-DTC (at -20 °C)
Noise current, in (see note 3)
-TC (at 0 °C)
-DTC (at -20 °C)
Capacitance
Rise/Fall time, RL=50 Ω
10% to 90% points
90% to 10% points
TEC maximal drive current
-TC
-DTC
TEC maximal bias voltage
-TC
-DTC
Dark count rate at 5% photon detection
probability (830 nm)
(see Figure 9 and note 4)
Voltage above Vbr for 5% photon
detection probability (830 nm)
(see Figure 7 and note 4)
After-pulse ratio at 5% photon detection
probability (830 nm) (note 5)
www.excelitas.com
C30902EH/C30902EH-2
C30902BH
C30921EH
Min Typ Max
C30902SH
C30902SH-2
C30921SH
Min Typ Max
0.5 0.5
0.2 0.2
0.55 0.55
1.61 1.61
0.25 0.25
90 90
55 55
33 33
114 114
78 78
225 225
0.5 0.7 0.9 0.5 0.7 0.9
150 250
70 77
55 65
117 128
92 108
77
60
15 30
77
60
15 30
0.23 0.5
0.11 0.2
1.6 2
0.5 0.75
0.5 0.75
1.6 2
0.5 0.75
0.5 0.75
5000 15000
Page 2 of 14
2
2
15
C30902SH-TC
C30902SH-DTC
Min Typ
Max
0.5
0.2
122
N/A
N/A
129
N/A
225
0.5 0.7
0.9
Units
mm
mm²
[no units]
[no units]
mm
Degrees
Degrees
V
V/˚C
0
-20
250
128
108
77
60
15 30
2
1
0.04
0.02
1.6 2
0.5 0.75
0.5 0.75
1.8
1.4
1100 (-TC)
250 (-DTC)
0.8
2.0
15000
˚C
˚C
A/W
A/W
%
%
nA
nA
nA
pA/Hz
pA/Hz
pA/Hz
pF
ns
ns
A
A
V
V
cps
2V
2%
C30902 and C30921 Series-Rev.1-2014.09


Part Number C30902BH
Description High-speed solid state detectors
Maker Excelitas
Total Page 14 Pages
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