MAX3669EVKIT+ Maxim Integrated, MAX3669EVKIT+ Datasheet - Page 7

• Manufacturer Part Number: MAX3669EVKIT+
• Description: Laser Drivers +3.3V 622Mbps SDH/SONET Laser Driver with Current Monitors and APC
• Manufacturer: Maxim Integrated
• Type: Laser Driverr

Specifications of MAX3669EVKIT+

• Data Rate: 622 Mbps
• Operating Supply Voltage: 3.14 V to 5.5 V
• Supply Current: 40 mA
• Maximum Power Dissipation: 929 mW

Figure 4b. MAX3669 EV Kit Component Placement Guide—
Component Side
See Quick Start first.
COMPONENT
1.0"
R14
R15
R16
TP1
D1
P1
J5
_______________________________________________________________________________________
Fail Indicator Test Point
APC Fail Indicator LED
Electrical Output SMA
OUTPUT DISABLE
R
R
R
BIASMAX
NAME
MODSET
APCSET
Refer to the Design section of the MAX3669 data sheet. Set APC current;
then increase bias current until LED goes off (LED is illuminated when the
APC loop is open and off when the APC loop is closed).
Electrical Output. Remove for optical operation.
Enable/Disable the Output Currents. Shunting disables the part. Remove
shunt for normal operation.
Laser Modulation Current Adjustment
Laser-Bias Current Adjustment. In open-loop mode, R15 adjusts the laser-
bias current. In closed-loop operation, R15 adjusts the maximum laser-bias
current.
Automatic Power Control Adjustment. For closed-loop operation, R16
adjusts the monitor-diode current level.
TTL low level indicates a failure in the APC loop.
Adjustment and Control Descriptions
MAX3669 Evaluation Kit
Figure 5. MAX3669 EV Kit PC Board Layout—Component Side
1.0"
FUNCTION
7