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PDF LV1605M Data sheet ( Hoja de datos )
| Número de pieza | LV1605M | |
| Descripción | Monolithic Linear IC Analog Signal Processor | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Ordering number : ENN*7809
www.DataSheet4U.com
Preliminary
SANYO Semiconductors
DATA SHEET
Monolithic Linear IC
LV1605M Analog Signal Processor for CD Players
Overview
The LV1605M implements the analog signal processing and servo control required by compact disc players, and, when
combined with a CD DSP such as the LC78604E or LC78605E, can implement a CD player with a minimal parts count.
The LV1605M also provides a gain switching pin to allow it to support playback of CD-RW discs.
Functions
IV amplifier, RF amplifier (with AGC and hold function on defect detection), APC, FE (with VCA), TE (with VCA and
auto-balance), focus servo amplifier (with offset canceller and hold function on defect detection), tracking servo
amplifier (with offset canceller and hold function on defect detection), spindle servo amplifier (with gain switching
function and hold function on defect detection), sled servo amplifier (with on/off function and hold function on defect
detection), focus detection (DRF and FZD), track detection (HFL and TES), defect detection, shock detection, and disc
mode gain switching function.
Features
• The LV1605M provides the following automatic adjustment functions.
— Focus offset, auto canceller: FE (pin 21)
— Tracking offset, auto canceller: TE (pin 7)
— E/F balance automatic adjustment
— RF level AGC function
— Tracking servo gain RF level following function
— Focus servo gain RF level following function
• Focus search smoothing setting pin: FSC (pin 58)
• Focus search mode switching pin: FSS (pin 54)
• Play disc mode (normal or CD-RW) switching pin: RW (pin 44)
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft's
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
22704TN (OT) No. 7809-1/24
1 page  
LV1605M
Pin Functions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
Pin name
FIN2
FIN1
E
F
TB
TE–
TE
TESI
SCI
TH
TA
TD–
TD
JP
TO
FD
FD–
FA
FA–
FHO
FE
FE–
FH
SP
SPG
SP–
SPD
SLEQ
SLD
SL–
SL+
DVCC
DGND
TGL
TOFF
TES
TJP
HFL
CLV
INTI
CL
DAT
CE
RW
CLK
DEF
DRF
RFSM
RF–
PH1
AVCC
NC
FAJON
FSS
PON
LF2
AGND
FSC
BH1
REFI
VR
LDD
LDS
TC
I/O
I
I
I
I
I
O
I
I
I
O
O
O
O
O
O
I
I
I
I
O
I
O
I
I
I
I
I
I
I
O
O
O
I
I
I
O
O
I
Description
Pickup photodiode connection. The RF signal is generated by adding to the FIN1 pin, and the FE signal is generated by subtracting.
Pickup photodiode connection
Pickup photodiode connection. The TE signal is generated by subtraction with the F pin.
Pickup photodiode connection
TE signal DC component input
The TE signal gain is set by connecting a resistor between this pin and the TE pin.
TE signal output
TES (tracking error sense) comparator input. Apply a bandpass filter to the TE signal and input the result to this pin.
Shock detection input
Tracking gain time constant setting
TA amplifier output
Used for the tracking phase compensation constant formed between the TD and VR pins.
Tracking phase compensation constant connection
Tracking jump signal (kick pulse) amplitude setting
Tracking control signal output
Focusing control signal output
Used for the focusing phase compensation constant formed between the FD and FA pins.
Used for the focusing phase compensation constant formed between the FD- and FA- pins.
Used for the focusing phase compensation constant formed between the FA and FE pins.
Focus gain time constant setting
FE signal output
The FE signal gain is set by connecting a resistor between this pin and the FE pin.
Focus gain time constant setting
CLV input signal single-end output
Spindle 12 cm mode gain setting resistor connection
Used for the spindle phase compensation constant in conjunction with the SPD pin.
Spindle control signal output
Sled phase compensation constant setting
Sled control signal output
Input for the sled advance signal from the microcontroller.
Input for the sled advance signal from the microcontroller.
Digital system VCC
Digital system ground
Input for tracking gain control signal from the DSP. The gain is low when TGL is high.
Input for tracking gain control signal from the DSP. The gain is off when TOFF is high.
Outputs for the TES signal to the DSP.
Input for the tracking jump signal from the DSP
The high frequency level (HFL) signal is used to judge whether the position of the main beam is over a pit or over a mirror area.
CLV error signal from the DSP
Forced defect detected state signal input
Microcontroller command clock input
Microcontroller command data input
Microcontroller command chip enable input
Gain switching input. RW=high: CD mode, RW=low: CD-RW mode.
Reference clock input. The DSP 130kHz clock signal is input to this pin.
Disc defect detection output
Defect RF: RF level detection output
RF output
In conjunction with the RFSM pin, sets the RF gain and is used for the EFM signal 3T compensation constant setting.
RF signal peak hold capacitor connection
Analog system VCC.
NC (no connection)
Focus offset adjustment mode switching. FAJON=low: normal mode, FAJON=high: constant voltage FD mode.
Focus search select (FSS): focus search mode (± or + search relative to the reference voltage) switching.
Power On. PON=high: active mode, PON=low: sleep mode
Disc defect detection time constant setting
Analog system ground
Focus search smoothing capacitor connection
RF signal bottom hold capacitor connection
Reference voltage bypass capacitor connection
Reference voltage output
APC circuit output
APC circuit input
Tracking signal peak hold capacitor connection
No. 7809-5/24
5 Page 
LV1605M
• Focus judgment
The pickup is judged to get in focus when the Scurve reaches the REF level after the level REF + 0.2 V has been
detected in the focus error signal Scurve.
REF+0.2V
Point where focus
is achieved
A13936
• Disc defect detection
The mirror surface detection level is held by the capacitor connected to LF2 (pin 56), and a high level is output from
DEF (pin 46) if the dropout level in the EFM signal (RFSM output) rises above 0.35V. When DEF (pin 46) goes high,
the tracking servo goes to THLD mode. To prevent the tracking servo from going to THLD mode when a disc defect
is detected, either short DEF (pin 46) or short LF2 (pin 56) to ground. This prevents the DEFECT output from being
issued.
EFM signal
(RFSM output)
LF2(Pin 56)
0.35V
DEF(Pin46)
A13937
• Microcontroller interface
Since the Reset (Nothing) command initializes the LV1605M, it must be used with care. The LV1605M's command
acceptance (mode switching) timing is such that the mode switches on the (130kHz) clock cycle following the CE
(RWC) falling edge. Therefore, a low-level period in the CE signal of at least 10 µs is required when issuing
consecutive commands. The 130kHz clock is required for this reason. The various LV1605M instructions can be
issued by setting CE high and then, in synchronization with the CL clock, issuing the command from the
microcontroller, LSB first, to DAT (pin 42). Note that commands are executed starting at the fall of the CE signal.
Timing Chart
CE(RWC)
CL(CQCK)
DAT(COIN)
LSB MSB
A13938
* Items in parentheses are DSP pin names.
No. 7809-11/24
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet LV1605M.PDF ] | |
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