HA12220 Hitachi Semiconductor, HA12220 Datasheet - Page 2

• Manufacturer Part Number: HA12220
• Description: CD-ROM Drive Head Amplifier IC
• Manufacturer: Hitachi Semiconductor

HA12220F
Block Diagram
Rev.1, Apr. 1997, page 2 of 20
1
2
3
4
5
6
RF2
RF3
RF4
TR1
TR2
MD
APC
28
BAL
RF1
+
–
+
–
7
TR1
TR2
LD
27
V
BIAS
HD49250
CC
TE
EQ
–
+
TVR
TVR
26
8
RFS
–
+
FE
BYPS
0.1
HD49250
FE
+
–
9
TE
+
FVR2
–
FSA
25
+
–
+
VCF
TLPF
10
VCB
CI
-COM
ADC
10
GND
+
–
FA2
+
Gain=8dB Typ
–
FOK
+
–
GND
Offset
FVR
Gain=12dB Typ
TVR2
Gain changing
BUF
-COM
DAC
24
11
+
CO
RFC
1
AGC
100
+
+
23
–
–
VC
FA
TA
+
AGCF
0.1
12
HD49250
22
AGCO
-COM
13
Interface
XRST
IIL
DEFECT
HD49250
MIRR
21
14
DFH
0.015
CLK
DATA
MIRH
MIRR
FOK
DFT
XLT
20
19
18
17
16
15
HD49250
0.033
HD49250
HD49250
HD49250
HD49250