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參數(shù)資料
| 型號： | SM9103M |
| 廠商： | Seiko NPC Corporation |
| 英文描述： | DVDRAM Head Amplifier LSI |
| 中文描述： | DVDRAM頭放大器LSI的 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大小： | 92K |
| 代理商： | SM9103M |
SM9103M
NIPPON PRECISION CIRCUITS—1
NIPPON PRECISION CIRCUITS INC.
DVDRAM Head Amplifier LSI
OVERVIEW
The SM9103M is a photodiode photoelectric cur-
rent-to-voltage conversion head amplifier LSI for
optical disk pickups in DVDRAM/DVDROM equip-
ment. It sums the photodiode current data signals and
then converts the signals to a differential signal for
output. The output tracking servo and focusing servo
signals are derived from built-in sum and difference
circuits, and the gain for these servo signals can be
adjusted using serial interface controls. Each of the
signals from the photodiodes, used to generate DPD
(Differential Phase Detection) tracking servo signal,
is current-to-voltage converted and then also output.
It operates from a single 5 V supply, and is available
in 36-pin plastic SSOP packages.
FEATURES
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RAM/ROM gain switching, low-noise RF signal
generator (differential output)
ROM tracking DPD signal output
Variable-gain RAM tracking push-pull signal out-
put
Address signal, high-speed push-pull signal output
Variable-gain focus error signal output
Tracking PD sum signal output
Focus PD sum signal output
Offset correction timing output (logic)
Temperature monitor function
Serial interface to control internal parameter set-
tings
Sleep-mode function
Single 5 V supply
36-pin plastic SSOP
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TYPICAL APPLICATIONS
I
Double-speed DVDROM equipment
Double-speed DVDRAM equipment
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ORDERING INFORMATION
PINOUT
36-pin SSOP
(Top view)
Device
Package
SM9103M
36-pin SSOP
1
MODE
2
WRITE
3
DGND
4
DVCC
5
TEMPO
6
TEMPI
7
T1
8
T2
9
T3
10
T4
11
F1
12
F2
13
AGND
14
VREF
15
FSUBB
16
FSUB
17
FADDB
18
FADD
19
AGND
20
AVCC
21
DPDD
22
DPDC
23
DPDB
24
DPDA
25
DATAN
26
DATAP
27
TSUBB
28
TSUB
29
CAPAN
30
CAPAP
31
TADDB
32
TADD
33
CALREQ
34
SENB
35
SDATA
36
SCLK
S
N
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