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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)： | 6/36頁 |
| 文件大?。?/td> | 197K |
| 代理商： | AN8725FH |
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AN8725FH
ICs for Optical Disk Drive
6
I
Pin Descriptions (continued)
Pin No.
Symbol
Category
Description
48
AAF
MSC
A
AAF characteristic setting pin for optical monitor circuit.
Connect an external resistor, capacitor between AAF and IVOUT and set
up a cutoff frequency.
49
IVOUT
OUT
A
I to V conversion signal output pin.
Connect an external variable resistor between IVIN and IVOUT.
50
IVIN
MSC
A
I to V conversion resistor connection pin.
Connect an external variable resistor between IVIN and IVOUT.
51
IPD
MSC
A
Pin photo diode (PD) connection pin.
Connect a pin photo diode for detecting a semiconductor laser emitting
light. Connect anode to this pin.
Applicable to a source-type PD which has a typical value of 40
μ
A to
160
μ
A output in object lens output power of 1 mW.
52
CGND
PS
A
GND pin in an optical monitor circuit.
Must be used in the same potential as other GND pins.
53
CV
CC
PS
A
Power supply pin in an optical monitor circuit.
Must be used in the same potential as other power supply pins.
54
AGND
PS
A
GND pin exclusive to a analog circuit.
Must be used in the same potential as other GND pins.
55
ERREF
IN
A
Abnormally emitting light detecting range setting pin.
Sets a full scale voltage of DAC5 and DAC6.
A setting range is VNR or more and input range of an external ADC
or less.
56
VNR
IN
A
Reference level input pin for PWRMONI output.
Input a reference voltage of 1.25 V of an external ADC.
57
DACMONI
OUT
A
DAC5, DAC6 monitor pin.
DAC5 voltage is outputted when DAC56 SW register is low, DAC6
voltage is outputted when DAC6 voltage is high.
58
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.
59
SGND
PS
D
Pin connected to the chip substrate.
60
SGND
PS
D
Must be used in the same potential as other GND pins.
61
SGND
PS
D
62
RGND
PS
A
GND pin for the lead current setting DAC7 and DAC8.
Must be used in the same potential as other GND pins.
63
RDCP1
MSC
A
Pin to connect a de-coupling capacitor to protect the output current of
DAC7, the read current setting circuit, from disturbance by a switching
noise such as peak current.
(Connects a capacitor between RDCP1 and RGND.)
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