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12. IC DATA
Q101 : TZA1024
Pin Description
SYMBOL PIN DESCRIPTION
LD
1 current output to laser diode
VDD(L)
2 laser supply voltage
CFIL
3 external lter capacitor
MON
4 laser monitor diode input
DIN
5 central diode input
GND
6 ground
PWRON
7 power-on select input
CMFB
8 common mode feedback voltage input
RFFB
9 external RF feedback resistor
RFEQO
10 RF ampli er output
CDRW
11 gain select input for CD-A/V, CD-R/W
EQSEL
12 equalizer/speed select input (n=1,2or 4)
VDD
13 supply voltage
RGADJ
14 external laser supply gain adjust resistor
Q103/Q104/Q105 : TDA7073AT
Pin Description
SYMBOL
PIN DESCRIPTION
IN1-
1
negative input1
IN1+
2
positive input1
n.c.
3
not connected
n.c.
4
not connected
VP
5
positive supply voltage
IN2+
6
positive input2
IN2-
7
negative input2
n.c.
8
not connected
OUT2+
9
positive output 2
GND2
10
ground2
n.c.
11
not connected
OUT2-
12
negative output2
OUT1-
13
negative output1
GND1
14
ground1
n.c.
15
not connected
OUT1+
16
positive output 1
V DD
1 3
1x
1 1
CDRW
4x
5
D I N
2x
V/ I
( 1 )
4
V GAP
MON
V/ I
6
2
V D D ( L )
G N D
V P
5
p o s i t i v e
2
i n p u t
1
n e g a t i v e
1
i n p u t
1
TDA 7 0 7 3 A
TDA 7 0 7 3 AT
p o s i t i v e
6
i n p u t
2
n e g a t i v e
7
i n p u t
2
1 0
g r o u n d 2
43
V DD
1 2
9
1 0
8
2 5 0
kHz
TZ A1 0 2 4
1
1 4
3
7
V DD
I
+
i
1 6
I
I
i
1 3
SHORT - C I RCU I T AND
THERMA L PROTECT I ON
-
I
i
1 2
II
I
+
i
9
3 , 4 , 8 , 1 1 , 1 5
1 4
n . c .
g r o u n d 1
E Q S E L
RFFB
RFEQO
CMFB
L D
RGADJ
C F I L
P W R O N
p o s i t i v e
o u t p u t 1
n e g a t i v e
o u t p u t 1
n e g a t i v e
o u t p u t 2
p o s i t i v e
o u t p u t 2
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