Sharp XL-3000V - Manual (Page 52)

XL-3000V
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IC801 VHiTA2109F/-1:Servo Pre Amp. (TA2109F)
1 VCC — Power voltage terminal
2 FNI Input Main beam amp input terminal
3 FPI Input Main beam amp input terminal
4 TPI Input Sub-beam amp input terminal
5 TNI Input Sub-beam amp input terminal
6 MDI Input Monitor photodiode amp input terminal
7 LDO Output Laser diode amp output terminal
8 SEL Input Laser diode control signal input and APC circuit ON/OFF signal input terminal
9 TEB Input Tracking error balance adjustment signal input terminal
To be controlled by 3-value PWM signal. (PWM carrier = 88.2 kHz)
10 2VRO Output Standard voltage (2VR) output terminal. When Vcc = 5V, 2VR = 4.2V.
11 TEN Input Tracking error signal generation amp reversed phase input terminal
12 TEO Output Tracking error signal generation amp output terminal
13 SBAD Output Sub-beam addition signal output terminal
14 FEO Output Focus error signal generation amp output terminal
15 FEN Input Focus error signal generation amp reversed phase input terminal
16 VRO Output Standard voltage (VR) output terminal. When Vcc = 5V, VR = 2.1V.
17 RFRP Output Track count signal generation amp output terminal
18 RFIS Input RFRP detection circuit input terminal
19 RFGO Output RF signal output terminal
20 RFGC Input RF amplitude adjustment control signal input terminal
The amplitude of RF signal can be controlled by using the 3-value PWM signal (PWM
carrier = 88.2 kHz) which is output from the RFGC terminal of TC9432F.
21 AGCI Input RF signal amplitude adjustment amp input terminal
22 RFO Output RF signal generation amp output terminal
23 GND — GND terminal
24 RFN Input RF reversed phase input terminal
Terminal Name Pin No. Input/Output Function
IC801 VHiTA2109F/-1:Servo Pre Amp. (TA2109F)
15k Ω
15k Ω
50k Ω
10k Ω
7.96k Ω
10k Ω
21k Ω 21k Ω
12k Ω
12k Ω
20k Ω
20k Ω
23.5k Ω
12k Ω
1.53k Ω
20k
Ω
3.3k
Ω
180k
Ω
60k Ω
60k Ω
20k Ω
20k Ω
20k Ω
180k Ω
180k Ω
180k Ω
13k Ω 2.12k Ω
680k Ω
1k Ω
47k Ω
1.74k Ω
24k Ω
30k
Ω
24k Ω
21k Ω 29k Ω
10k Ω
7.67k Ω
30k Ω
10k Ω
10k Ω
20k Ω
3.3k
Ω
20pF
20pF
40pF
20pF
40pF
36pF
10pF
PEAK
BOTTOM
re = 130 Ω
SW 3
SW 2
SW 1
65 µ A
50 µ A
20 µ A
2
3
4
5
1
7
8
9
6
12 13
14
15
11
17
18
19
10
16
22
23
24
21
20
VCC
FNI
FPI
TPI
TNI
MDI
LDO
SEL
TEB
2VRO
TEN
TEO
RFN
GND
RFO
AGCI
RFGC
RFGO
RFIS
RFRP
VRO
FEN
FEO
SBAD
3 STATE
DET.
I . I
I . I
SEL
L
HiZ
H
SW1 SW2
LDC
SW3
ON
ON
ON ON
ON OFF
OFF
OFF OFF
LDC
Figure 52 BLOCK DIAGRAM OF IC