
TA2153FN
2003-01-18
3
Pin Function
Pin No.
Symbol
I/O
Function Description
Remarks
1
VCC
Power supply input terminal.
2
RFGC
I
RF amplitude adjustment control signal input terminal.
Controlled by 3-PWM signals.
(PWM carrier
= 88.2 kHz)
3 signals input.
(2VRO, VRO, GND)
3
GMAD
I
Open loop gain adjustment terminal for AGC amp.
(Note1)
4
FNI
I
Main beam I-V amp input terminal.
Connected to pin diode
output B
+ D
(through resistor).
5
FPI
I
Main beam I-V amp input terminal.
Connected to pin diode
output A
+ C
(through resistor).
6
TPI
I
Sub beam I-V amp input terminal.
Connected to pin diode
output F.
7
TNI
I
Sub beam I-V amp input terminal.
Connected to pin diode
output E.
8
MDI
I
Monitor photo diode amp input terminal.
Connected to monitor photo
diode.
9
LDO
O
Laser diode amp input terminal.
Connected to laser diode
control circuit.
10
SEL
I
Laser diode control signal input terminal and APC circuit
ON/OFF control signal terminal.
SEL
Level
APC
Circuit
LDO
Detect
Frequency
GND
OFF
Connected to VCC
through resister (1 k
W)
Low
HiZ
ON
Control signal output
Low
VCC
ON
Control signal output
High
3 signals input.
(VCC, HiZ, GND)
11
TEB
I
Tracking error balance adjustment signal input terminal.
Controlled by 3-PWM signal.
(PWM carrier
= 88.2 kHz)
3 signals input.
(2VRO, VRO, GND)
12
2VRO
O
Reference voltage (2VRO) output terminal.
2VRO
= 4.2 V when VCC = 5 V
13
TEN
I
TE amp negative input terminal.
Connected to TEO through
feedback resistor.
14
TEO
O
TE error signal output terminal.
15
SBAD
O
Sub beam adder signal output terminal.
16
FEO
O
Focus error signal output terminal.
17
FEN
I
FE amp negative input terminal.
Connected to FEO through
feedback resistor.
18
SEB
I
RFRP output circuit switching terminal.
SEB Level
Bottom
Detection
Peak
Detection
GND
ON
VCC
OFF
ON
Low (GND) is for normal use.
19
VRO
O
Reference signal (VRO) output terminal.
VRO
= 2.1 V when VCC = 5 V
20
RFRP
O
Track count signal output terminal.
21
BTC
I
Time constant adjustment terminal for bottom detection.
Adjusted by capacitance.