SY88022LMG Micrel Inc, SY88022LMG Datasheet - Page 8

• Manufacturer Part Number: SY88022LMG
• Description: IC LASER DVR 11.3GBPS 3.3V 16MLF
• Manufacturer: Micrel Inc
• Type: Laser Diode Driver (Fiber Optic)r

Specifications of SY88022LMG

• Data Rate: 11.3Gbps
• Number Of Channels: 1
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 65mA
• Current - Modulation: 60mA
• Current - Bias: 80mA
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-MLF®, QFN
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-3703-5; SY88022LMG

Micrel, Inc.
Functional Diagram
Functional Description
As shown on the block diagram above, the driver is
composed from an input equalizer, and a modulation
block consisting of a pre-driver, and a current source.
Equalizer
The input equalizer allows for compensation of up to 9”
of FR4 microstrip trace or equivalent. The equalization
restores the losses in high frequency components of the
signal caused by its travel on the line card traces and
through the connectors between the line card and the
module
before it reaches the input stage. The amount of
equalization is programmable with a resistor from pin 7
to ground.
Modulator
The modulator consists of a pre-driver and a current
source. The modulation current is set in the pre-driver by
applying a voltage within the range 0V to 1.2V to pin 5
(MODSET). The pre-driver provides the current to the
output stage, which consists of a current source
October 2009
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composed from a differential pair which collectors are
connected to MOD+/MOD- pins and have 50 Ω internal
termination to VCC. The Modulation gain curve on page
6 shows modulation current variation versus the applied
voltage at MODSET pin.
Bias
The bias is set by applying a voltage within the range 0V
to 1.2V to pin 16 (BIASSET). The bias gain curve on
page 6 shows bias current variation versus the applied
voltage at pin 16.
The SY88022L driver is designed to work with one of the
Micrel’s MIC300X series of controllers which have built
in APC (Automatic Power Control) circuit and a serial
interface
temperature compensation tables, setting registers, and
monitoring
MIC3001/MIC3002/MIC3003
details. The applications section below shows how to set
up the driver to work correctly with the MIC300X
controller.
for
registers
programming
[e-mail] or [phone]
read
datasheets
modulation
back.
M9999-102809-A
Refer
and
for
SY88022L
to
more
bias,
the