7
SD0XX-17-51-21X
High Speed Si Pin Photodiode
SD0XX-17-51-21X series features 3 high-speed silicon photodiodes that
have been specifically developed for the price-sensitive optical communication
applications, including fiber-optic LAN, VCSEL-based links, and
instrumentation. Designed to be fully depleted at low voltages, the devices
offer exceptionally low capacitance and fast responses. Typical speeds are
from 200 MHz for the large device up to 1GHz for the smallest active area.
Their excellent quantum efficiency, about 70% at 850nm, results in higher
sensitivity than that of many comparable devices but even higher QE's are
available upon request for the most demanding applications.
All three devices come in rugged, hermetically sealed TO-46 packages that
are suitable for fiber couplers like SMA and ST connectors. The user has a
choice of flat (-211), domed (-214) or microball window (-218) caps. In
addition, almost any fiber connector style is also available upon request. The
assemblies are isolated from their housing, thus offering flexibility in biasing
and minimized EMI susceptibility.
Electro-Optical Characteristics
@ +23, V
b
=5V, unless otherwise noted
Device P/N
Active Area Dia.
Dark Current
Capacitance
@1MHz
Rise Time
Dark Noise
Density
SD008-17-51-21X
0.008" (0.2mm)
0.1 nA
0.3 pF
350 ps
5 fA/
Hz
SD020-17-51-21X
0.020"(0.5mm)
0.15 nA
2 pF
1 ns
6 fA/
Hz
SD040-17-51-21X
0.040" (1mm)
0.25 nA
10 pF
1.8 ns
8 fA/
Hz
Absolute Maximum Ratings*
Storage Temperature
-55C to +150C
Operating Temperature
-40C to +125C
Lead Temperature
+300C (soldering, 10 sec)
Reverse Bias Voltage
25V
*Operating beyond these limits may cause permanent damage to the device.
Features
0.2, 0.5 & 1mm active dia.
High speed, up to 1GHz
Excellent QE
Low noise
Low bias voltage
Low capacitance
TO-46 and fiber packages
Wide operating temp range
Applications
Optical communication
High speed radiometry
API reserves the right to change specifications without notification.
Spectral Responsivity @ V
b
=5V, T
a
=23C
0.0
0.1
0.2
0.3
0.4
0.5
0.6
400
500
600
700
800
900
1000
1100
Wavelength (nm)
Res
pons
iv
it
y
(
A
/
W
)
Small signal response
R
l
= 50
,
source: 850nm VCSEL
Rev. 22 Feb, 2001
Preliminary
MECHANICAL DIMENSIONS AND PIN-
Typical Performance Graphs
1240 Avenida Acaso, Camarillo, CA 93012
(805) 987-0146 Fax (805) 484-9935
www.advancedphotonix.com
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