MODULE
APD module
C5658
Detects optical signals at 1 GHz, with high sensitivity
APD module C5658 is a highly sensitive photodetector consisting of a Si APD (avalanche photodiode), a bias power supply and a low-noise
amplifier, all integrated into a compact case. The APD used has an effective active area of
蠁0.5
mm to allow efficient coupling to a light beam in
applications such as spatial light transmission. The APD internally multiplies the photocurrent to produce an ample gain (set to 100 times for
C5658) and also features high-speed response, achieving detection limits up to 1 GHz wideband and -48 dBm (16 nWr.m.s.) noise level in
combination with the low-noise amplifier. C5658 also incorporates a thermosensor and a temperature-compensated bias power supply necessary
for stable operation of the APD. Highly sensitive optical measurements can be made just by supplying +12 V to C5658.
Features
Applications
s
Absolute maximum ratings
Parameter
Supply voltage
Maximum incident light level
Operating temperature
Storage temperature
Parameter
Spectral response range
Active area
Quantum efficiency
l
High-speed response and high sensitivity
l
Flat frequency characteristics
l
Compact and lightweight
l
Single power supply operation
Condition
Continuous input
l
Laser radar
l
Spatial light transmission
l
Optical rangefinder
Value
+13.5
10
0 to +50
-30 to +80
Typ.
400 to 1000
蠁0.5
70
1
1
2.5 脳 10
5
鹵5.0
-48
50
1.5
3
Unit
V
mW
擄C
擄C
Unit
nm
mm
%
GHz
MHz
V/W
%
dBm
鈩?/div>
-
碌W
s
Electrical and optical characteristics (Ta=25 擄C, Vcc=12 V, output terminated with 50
鈩?
Condition
Cut-off frequency (-3 dB)
Detection sensitivity
Gain stability
Noise level
Output impedance
VSWR *
Compression point at 1 dB
* VSWR (Voltage Standing Wave Ratio)
If internal matching of elements on a signal transmission line (matching between element input/output impedance and signal line
impedance) is poor, signal reflections occur that generate standing waves on the signal line. The VSWR is the ratio of standing
wave maximum amplitude (V Max.) to minimum amplitude (V Min.) and indicates how well the impedance is internally matched.
When this internal matching is complete, no standing waves exit and the VSWR is 0 (zero).
位=800
nm
High band
Low band
位=800
nm
25 擄C 鹵 10 擄C
Dark state
s
Signal connector
Parameter
Signal output
Power supply connector
Standard
SMA
D-sub 9 pin
s
General specifications
Parameter
Supply voltage
Current consumption
Dimensional outline
Weight
Condition
Excluding projecting parts
Value
+12 鹵 0.1
100
28 脳 50 脳 60
120
Unit
V
mA
mm
g
1
2
