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G569CS8UF

更新时间： 2024-11-15 13:07:55
品牌 Logo 应用领域
致新 - GMT 驱动器驱动程序和接口二极管激光二极管接口集成电路
页数 文件大小 规格书
11页 179K
描述
Interface Circuit

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G569CS8UF 数据手册

 浏览型号G569CS8UF的Datasheet PDF文件第2页浏览型号G569CS8UF的Datasheet PDF文件第3页浏览型号G569CS8UF的Datasheet PDF文件第4页浏览型号G569CS8UF的Datasheet PDF文件第5页浏览型号G569CS8UF的Datasheet PDF文件第6页浏览型号G569CS8UF的Datasheet PDF文件第7页 
Global Mixed-mode Technology Inc.  
CD-RW Laser Diode Current Driver  
General Description  
G569C  
Features  
„
„
„
„
„
„
„
„
Single +5V supply  
The G569C is a single chip solution for the various  
functions relating to laser diode operation in a CD-RW  
drive. The G569C integrates nine functional blocks in  
one chip. It has five voltage-to-current converters, one  
current-to-voltage converters which is called FSA, one  
OP-AMP, one eight-channels D/A converter, and one  
voltage subtracter with output clamping capability  
called Dalpha.  
Laser diode read current driver  
Laser diode write current driver  
Laser diode Erase current driver  
Deltap circuit to control write current  
FSA circuit to integrate photo diode current  
Cagain circuit to convert Vcagain into current  
Dalpha circuit to perform voltage subtraction  
and limiting  
Three of the five V-to-I converters provide the laser  
diode currents for Read, Write, and Erase operations,  
respectively; another one of the V-I converters  
provides the Cagain current; and the other one  
provides Deltap current which can selectively shunt a  
certain amount of laser diode current for write  
operation. For the Write and Erase operations, the  
voltage to current conversion ratio can be adjusted  
using an external or internal DAC resistor array. The  
FSA circuit performs integration on the output current  
of an external photo diode, and sample-and-hold the  
peak voltage. It is used to monitor the laser diode  
power. The internal eight-channel D/A converter is  
used to provide the input voltage for above functional  
blocks. The G569C is available in a 48-pin SSOP  
surface-mount package.  
„
„
„
3-wire interface to control internal DAC  
A build-in OP-AMP  
48-pin SSOP package  
Applications  
„
CD-RW Drive  
Pin configuration  
Ordering Information  
G569C  
TEMP.  
RANGE  
ORDER ORDER NUMBER  
PACKAGE  
NUMBER  
(Pb free)  
IW_IN  
LS_DELTA  
TST1  
1
2
3
48  
47  
46  
WDB  
LS_WRITE  
PWRITE  
LD  
G569CS8U  
G569CS8Uf  
0°C to 85°C SSOP-48  
Note: S8: SSOP-48  
U: Tape & Reel  
PWO  
DALPHA  
PWO_I  
4
5
6
7
45  
44  
43  
42  
41  
DI  
CLK  
PWB  
PWMAX  
PWMIN  
/RESET  
VSS  
8
9
VOUT  
40 VI-  
10  
39  
38  
37  
36  
35  
VI+  
VSS 11  
VDD  
FSOF  
FSWS  
EDB  
LS_ERASE  
PERASE  
12  
13  
14  
15  
16  
FSCLR  
FSW  
34  
33  
32  
31  
30  
29  
RECORD  
CDR  
IFSA  
17  
18  
19  
20  
21  
S2V9  
FSR  
CAGAIN2  
CAGS_I  
DCAGAIN  
CAGAIN  
FSRS  
VDD  
SELN4_IN  
28 PR_I  
RCAGAIN1 22  
27  
26  
25  
LS_READ  
IR  
23  
RCAGAIN2  
24  
PRCOARSE  
PRFINE  
SSOP-48  
TEL: 886-3-5788833  
http://www.gmt.com.tw  
Ver: 1.0  
Oct 02, 2000  
1
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