M02069 Datasheet, PDF (15/44 Pages) M/A-COM Technology Solutions, Inc. – 3.3 or 5 Volt VCSEL/FP Laser Driver IC for Applications to 4.3 Gbps

Functional Description
Table 2-1.
Pin
Number
Pin Definitions
Pin Name
Pin equivalent load
V_CC
V_CC3
I_PIN
13
I_PIN
33 Ω
Function
For CC_SEL low - Current input from monitor photodiode anode.
The APC loop will adjust the laser bias current to maintain a voltage at APC_SET of
approximately 1.3V and at this pin of approximately one V_GS.
For CC_SEL high - Current source for monitor photodiode cathode.
The APC loop will adjust the laser bias current to maintain a voltage at APC_SET of
approximately 1.3V and at this pin of approximately one V_GS below V_CC3.
V_CC
IBOUT_CA
(CC_SEL = low)
IBOUT_CA
14
V_CC
SGND (CC_{SEL SGND}
= high)
Laser bias current output for common anode lasers (CC_SEL must be low).
Connect directly to laser cathode or at higher bit rates through a ferrite or a
resistor to isolate the capacitance of this pin from the modulation drive, (~ 6pF).
Maintain a voltage at least 0.7V above GND at this pin
Switched ground connection for common cathode lasers (CC_SEL must be high).
Provides redundant shutdown during a disable or fault condition. This switch is
disabled during common anode operation.
02069-DSH-001-D
Mindspeed Technologies™
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