RF Amplifier
CXA2550M/N
RF Amplifier for CD Players
Description The CXA2550M/N is an IC developed for compact disc players. This IC i...
Description
CXA2550M/N
RF Amplifier for CD Players
Description The CXA2550M/N is an IC developed for compact disc players. This IC incorporates an RF amplifier, focus error amplifier, tracking error amplifier, APC circuit and RF level control circuit. (The voltageconverted optical pickup output is supported.) Features Low power consumption (35mW at 3.5V) APC circuit RF level control circuit Both single power supply and dual power supply operations possible. Structure Bipolar silicon monolithic IC Applications Compact disc players Block Diagram and Pin Configuration (Top View)
18 AGCCONT (50%/30%/OFF)
CXA2550M 20 pin SOP (Plastic)
CXA2550N 20 pin SSOP (Plastic)
Absolute Maximum Ratings (Ta = 25°C) 12 V Supply voltage VCC Operating temperature Topr –20 to +75 °C Storage temperature Tstg –65 to +150 °C Allowable power dissipation PD (SOP) 620 mW (SSOP) 370 mW Operating Conditions Supply voltage VCC – VEE
3.0 to 4.0
V
19 LD_ON
15 RF O
14 RFM
13 FE
12 FE_BIAS
17 RFTC
16 RF I
20 VCC
VCC
174k
11 TE 30k 30k 30k VC 10 49 96k VC 15k VEE TRACKING ERROR VC AMP
VC
VCC
15k
6k 54k
13.4k 50µA 670mV
VEE
154k FOCUS ERROR AMP 87k 32k 13k 32k 24p VC 260k 8 E VC VC VC 7 26k 12p 12p 13k F
24p
56k APC LD AMP
56k
10k
VC
2k
10k
10k
1k
VCC
55k
VEE VREF 1.25V
VC
2k
APC PD AMP
8k 6p 2k
8k 6p
10k
10k
VEE
10k
VC VC
2
5
VC
VEE VC
VC
260k
2k
25k
1
4
3
6
PD1
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