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TA2109F (IC704) : RF Amplifier
1.Terminal Layout
1
24
RFN
VCC
2
23
GND
FNI
3
22
RFO
FPI
4
21
AGCI
TPI
5
20
RFGC
TNI
6
19
RFGO
MDI
7
18
RFIS
LDO
8
17
RFRP
SEL
9
16
VRO
TEB
10
15
FEN
2VRO
11
14
FEO
TEN
12
13
SBAD
TEO
3.Pin Function
Pin No.
Symbol
1
VCC
2
FNI
3
FPI
4
TPI
5
TNI
6
MDI
7
LDO
8
SEL
9
TEB
10
2VRO
11
TEN
12
TEO
13
SBAD
14
FEO
15
FEN
16
VRO
17
RFRP
18
RFIS
19
RFGO
20
RFGC
21
AGCI
22
RFO
23
GND
24
RFN
2.Block Diagram
SBAD
13
FEO
14
FEN
15
VRO
16
RFRP
17
-
+
RFIS
18
RFGO
19
RFGC
20
AGCI
21
RFO
22
GND
23
RFN
24
I/O
-
Power supply input terminal
I
Main beam I-V amplifier input terminal
I
Main beam I-V amplifier input terminal
I
Sub beam I-V amplifier input terminal
I
Sub beam I-V amplifier input terminal
I
Monitor photo diode amplifier input terminal
O
Laser diode amplifier output terminal
I
Laser diode control signal input terminal and APC circuit ON/OFF control
signal input terminal
I
Tracking error balance adjustment signal input terminal Controlled by
3 PWM signal
O
Reference voltage (2Vref) output terminal 2Vref=4.2V when Vcc=5V
I
TE amplifier negative input terminal
O
TE error signal output terminal
O
Sub beam adder signal output terminal
O
Focus error signal output terminal
I
FE amplifier negative input terminal
O
Reference voltage (Vref) output terminal Vref=2.1V when Vcc=5V
Track count signal output terminal
O
I
RFRP detect circuit input terminal
O
RF gain signal output terminal
I
RF amplitude adjustment control signal input terminal
controlled by 3 PWM signal (PWM carrier =88.2 kHz)
I
RF signal amplitude adjustment amplifier input terminal
O
RF signal output terminal
-
Connect to GND
I
RF amplifier negative input terminal
+
-
-
+
+
-
-
+
+
-
PEAK
BOTTOM
-
+
-
-
+
+
-
+
Function
UX-M3R
+
TEO
12
-
TEN
11
2VRO
10
TEB
9
3 STATE
DET
SEL
8
SW1
LDC
-
+
LDO
7
SW2
+
-
6
MDI
TNI
5
I-I
TPI
I-I
4
-
FPI
3
+
-
FNI
2
+
Vcc
1
1-25
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