SY88905_05 Datasheet, PDF (1/10 Pages) Micrel Semiconductor – LASER DIODE CONTROLLER WITH APC

Micrel, Inc.
LASER DIODE CONTROLLER
WITH APC
SY88905
SY88905
FEATURES
DESCRIPTION
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
APPLICATIONS
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 (IBIAS)
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 (IBIAS) is
designed to automatically compensate for laser diode aging
and module temperature.
s Controller for High Speed Optical Data Transmission
s 1.25Gbps Gigabit Ethernet
s 531 Mbps and 1062Mbps Fibre Channel
s 622Mbps SONET
s Gigabit Interface Converter
BLOCK DIAGRAM
LOSIN
VCC
GND
LOSOUT
IBIAS
VREF2
40X
MD
-
+
VREF 2
VREF IBIAS SET
IBIAS FB
IPIN SET
M9999-081005
[e-mail] or [phone]
1
Rev.: C Amendment: /0
Issue Date: August 2005