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SY88905 Datasheet

  • SY88905

  • LASER DIODE CONTROLLER WITH APC

  • 109.49KB

  • 9頁(yè)

  • MICREL   MICREL

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LASER DIODE
CONTROLLER
WITH APC
FEATURES
s
DC bias current adjustable to 25mA
s
Buffered Loss-of-Signal output when used with
SY88903
s
Monitor Diode power control circuit
s
Designed for use with SY88902 and SY88903
s
Single power supply
s
Available in 10-pin (3mm) MSOP
SY88905
DESCRIPTION
The SY88905 is an integrated Laser Diode controller for
the SY88902 Laser Driver and SY88903 Laser Receiver
that provides power control functions for a complete module
solution. The SY88905 is designed to provide the laser
diode with an independent DC threshold current (I
BIAS
)
source to assure optimum laser diode performance. The
SY88905 also provides buffered Loss-of-Signal (LOS) output
in PECL level. The device is designed for fast and accurate
calibration of the laser diode.
Once the optimal operating point is determined and set
for a specific laser diode, the threshold current (I
BIAS
) is
designed to automatically compensate for laser diode aging
and module temperature.
PIN CONFIGURATION
LOS
IN
1
LOS
OUT
2
GND 3
I
BIAS
4
V
CC
5
MSOP
K10-1
10 V
REF
9 I
BIAS SET
8 I
BIAS FB
7
6
I
PIN SET
MD
APPLICATIONS
s
s
s
s
s
Controller for High Speed Optical Data Transmission
1.25Gbps Gigabit Ethernet
531 Mbps and 1062Mbps Fibre Channel
622Mbps SONET
Gigabit Interface Converter
BLOCK DIAGRAM
LOS
OUT
V
REF2
I
BIAS
MD
LOS
IN
40X
V
CC
GND
-
+
V
REF 2
V
REF
I
BIAS SET
I
BIAS FB
I
PIN
SET
Rev.: B
Amendment: /1
1
Issue Date: July 2000

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