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參數(shù)資料
| 型號： | AN8725FH |
| 廠商： | PANASONIC CORP |
| 元件分類： | 其它接口 |
| 英文描述： | Semiconductor laser power control IC |
| 中文描述： | SPECIALTY INTERFACE CIRCUIT, PQFP80 |
| 封裝： | 12 X 12 MM, PLASTIC, QFP-80 |
| 文件頁數(shù)： | 5/36頁 |
| 文件大?。?/td> | 197K |
| 代理商： | AN8725FH |
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ICs for Optical Disk Drive
AN8725FH
5
I
Pin Descriptions (continued)
Pin No.
Symbol
Category
Description
31
ERFIL
MSC
D
Filter setting pin to avoid a detection error of laser abnormality caused
by noise.
Connect an external capacitor between ERFIL and DGND, and set a filter
together with a resistor (10 k
) inside the IC. This pin is for schmitt-trigger
input.
32
XHFON
OUT
D
HF module on/off control signal output pin.
High corresponds to off and low to on.
33
DGND
PS
D
GND pin exclusive to a logic circuit.
Must be used in the same potential as other GND pins.
34
DV
CC
PS
D
Power supply pin exclusive to a logic circuit.
Must be used in the same potential as other power supply pins.
35
AGND
PS
A
GND pin exclusive to a analog circuit.
Must be used in the same potential as other GND pins.
36
VC
MSC
A
Output pin for reference voltage (1.25 V).
Connects a capacitor C between this pin and AGND for de-coupling.
37
RREF
MSC
A
Reference resistor connecting pin to determine an output current for each DAC.
Connect a resistor of 10 k
between RREF and AGND.
38
LPF11
MSC
A
LPF characteristic setting pin for DAC1 and DAC8.
39
LPF12
MSC
A
Connect an external resistor between LPF11 and LPF12, and then
capacitor between LPF12 and IGND to set up a cutoff frequency.
40
IGND
PS
A
GND pin for playback power supply setting DAC1, DAC9 and distur-
bance reduction LPF.
Must be used in the same potential as other GND pins.
41
SGND
PS
D
Pin connected to the chip substrate.
42
SGND
PS
D
Must be used in the same potential as other GND pins.
43
LPF91
MSC
A
LPF characteristic setting pin for DAC9 and DAC7.
44
LPF92
MSC
A
Connect an external resistor between LPF91 and LPF92 and then
capacitor between LPF92 and IGND to set a cutoff frequency.
45
AV
CC
PS
A
Power supply pin for an analog circuit, a reference supply voltage circuit, etc.
Must be used in the same potential as other power supply pins.
46
DETMONI
OUT
A
Pin to monitor a signal for detecting abnormally emitted light.
In a playback mode, the signal output is five times that in recording
(ten times is posisible by a register setting). Has offset to VNR due to
being outputted through a buffer of transistors.
47
PWRMONI
OUT
A
Laser emitting light monitor signal.
In a low-level of RPHOLD, the amplifier output has 10 times gain
compared with recording, and is equipped with AFF.
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