AK2573A Datasheet, PDF (37/38 Pages) Asahi Kasei Microsystems – 125M / 156M Laser Diode Driver + APC

ASAHI KASEI
[AK2573A]
Ⅶ. Circuit Example
Fig-A illustrates circuit example of AK2573A.
Fig-A Circuit Example
C11 C12 C13 C14
VCC = 3.3V +/- 0.2V
C20
C19
LD
L1
PD
RPD
CPD
C17
Open
VDDMD
NC
AVSS
PDMON
VDDDR
C18
VSSDR
BIAS
TEMPMON
BIASMON
TEMPALM
AK2573AVB ^MODMON
CURRALM
TEST1
OPTALM
TEST2
DATAALM
TEST3
NC
TEST4
DVSS
TEST5
SCL
TEST6
SDA
R1
C1
R2
L1: Ferrite Bead (Murata BLM18BD102)
fpd = 1/ (2*π*RPD*CPD) = 1kHz～10kHz
R1 = 10Ω +/- 1%
R2 = 12kΩ +/- 1%
R3 = R4 = R5 = R6 = 4.7kΩ～10kΩ
C1 = 1uF
C12=C14=C16=C18=C20 = 0.01uF or 0.001uF
C11=C13=C15=C17=C19 = 0.1uF
R3
Mod_def 1
Mod_def 2
R4
LVPECL I/F
(see below)
For full access: GND
For write protection: Open or VDD
Tx_Fault
R5
C15
C16
VCC or GND
Normal Operation with Open: Pull-down
R6
Shutdown Operation with Open: Pull-up
Tx_Disable
TD + ^C101
R101
TD -
C102
VDD or Open
DATA Only
AC Coupling
DATAP
DATAN
SEL
CLKP
CLKN
R101 = 100Ω
C101 = C102 >= 0.01uF
DATA Only
DC Coupling
R111
TD +
R113
TD -
R112
R114
LVPECL I/F
DATAP
DATAN
SEL
CLKP
VDD or Open
CLKN
R111 = R113 = 130Ω
R112 = R114 = 82Ω
DATA & CLK
DC Coupling
TD +
R121
DATAP
R123
TD -
R122
DATAN
R124
CLK +
SEL
R125
CLKP
R127
CLK -
R126
CLKN
R128
R121 = R123 = R125 = R127 = 130Ω
R122 = R124 = R126 = R128 = 82Ω
<MS0189-E-01>
-37-
2004/5