CXA1821M
RF Amplifier for CD Players
Description
The CXA1821M is an IC developed for compact
disc players. This IC incorporates an APC circuit and
RF, focus error, and tracking error amplifiers for 3-
spot optical pickup output. (The voltage-converted
optical pickup output is supported.)
Features
•
Low power consumption (40mW at ±2.5V)
•
APC circuit
•
Both single power supply (+5V) and dual power
supply (±2.5V) operations possible.
•
Compatible with pickup for LC and PD
•
Supports the RF amplifier at double speed.
Applications
Compact disc players
Structure
Bipolar silicon monolithic IC
Block Diagram and Pin Configuration
FE BIAS
LD ON
LC/PD
RFO
RFE
V
CC
EO
VC
FE
TE
20 pin SOP (Plastic)
Absolute Maximum Ratings
(Ta = 25°C)
12
•
Supply voltage
V
CC
•
Operating temperature Topr –20 to +75
•
Storage temperature
Tstg
–65 to +150
600
•
Allowable power dissipation
P
D
Operating Conditions
•
Supply voltage
V
CC
– V
EE
V
°C
°C
mW
2.8 to 11.0
V
19
13
20
18
17
16
15
14
TRACKING
ERROR AMP
VC
12
FOCUS
ERROR AMP
APC LD AMP
RF EQ AMP
5.6k
10k
VC
VC BUFFER
123k
147
VC
EI
10
260k
12p
V
EE
15k
V
C 25p
56k
174k
VC
23.8k
23.8k
VC
RF SUMMING AMP
V
CC
56k
10k
10k
1k
VREF
1.25V
V
EE
28k
26k
820k
V
EE
260k
24k
30k
24k
30k
24k
30k
24k
1
2
30k
VC
7
8
3
4
5
6
F
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
–1–
V
EE
LD
PD
A
B
C
D
E
9
820k
55k
12p
13k
VC
11
30k
30k
123k
V
EE
164k
25p
87k
22k
10k
V
CC
V
CC
E94932-TE
SONY [ SONY CORPORATION ]
