CXA2550N Sony, CXA2550N Datasheet

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CXA2550N

Manufacturer Part Number
CXA2550N
Description
Manufacturer
Sony
Datasheet

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Block Diagram and Pin Configuration (Top View)
Description
disc players. This IC incorporates an RF amplifier,
focus error amplifier, tracking error amplifier, APC
circuit and RF level control circuit. (The voltage-
converted 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
Structure
Applications
The CXA2550M/N is an IC developed for compact
operations possible.
Bipolar silicon monolithic IC
Compact disc players
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.
RF Amplifier for CD Players
– 1 –
Absolute Maximum Ratings (Ta = 25°C)
• Supply voltage
• Operating temperature Topr
• Storage temperature
• Allowable power dissipation
Operating Conditions
Supply voltage
CXA2550M/N
20 pin SOP (Plastic)
CXA2550M
V
CC
V
Tstg
P
CC
D
– V
20 pin SSOP (Plastic)
(SSOP) 370
(SOP)
EE
CXA2550N
–65 to +150
–20 to +75
3.0 to 4.0
620
12
E97514B25
mW
mW
°C
°C
V
V

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CXA2550N Summary of contents

Page 1

... Absolute Maximum Ratings (Ta = 25°C) • Supply voltage V CC • Operating temperature Topr • Storage temperature Tstg • Allowable power dissipation P (SOP) D (SSOP) 370 Operating Conditions Supply voltage V – – 1 – CXA2550N 12 V –20 to +75 °C –65 to +150 °C 620 mW mW 3 E97514B25 ...

Page 2

Pin Description Pin Symbol I/O No — AGCVTH PD1 I 5 PD2 — EE Equivalent circuit 50µ 147 13.4k 10µ 10k 2 1k 20µ 8µ 55k 147 ...

Page 3

Pin Symbol I/O No — Equivalent circuit 12p 260k Inversion input pin for F and E I-V amplifiers. Connect these pins ...

Page 4

Pin Symbol I/O No FE_BIAS RFM Equivalent circuit 32k 164k 24p 174k 10µ 24p 174k 300µ 147 850 1m 147 15 60k 1m – ...

Page 5

Pin Symbol I/O No RFTC — AGCCONT LD_ON Equivalent circuit 147 15k 20µ 50µ 147 50µ 10µ 15µ 15µ 147 50k 7µ 50µ 147 ...

Page 6

Measure- amplifier RF amplifier FE amplifier – 6 – CXA2550M/N TE APC ...

Page 7

Measure- control level RF AGCCONT – 7 – CXA2550M/N ...

Page 8

CXA2550M/N ...

Page 9

Description of Functions RF Amplifier The photodiode current input to the input pins (PD1, PD2) are current-to-voltage (I-V) converted by the equivalent resistance of 58k at PD I-V amplifiers, respectively. The signal is added by the RF summing amplifier and ...

Page 10

Tracking Error Amplifier Each signal current from the photodiodes E and F is I-V converted and input to Pins 7 and 8 via a resistor which determines the gain. The signal is amplified by the gain amplifier, operated by the ...

Page 11

Center Voltage Generation Circuit This circuit provides the center potential when this IC is used at single power supply. The maximum current is approximately ±3mA. The output impedance is approximately 30k 30k V EE APC & ...

Page 12

... Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same. GND R9 0.01µ ...

Page 13

LASER POWER CONTROL (LPC) The RF level is stabilized by attaching an offset to the APC V RF level fluctuations. The RF O and RF I levels are compared and the larger of the two is smoothed by the ...

Page 14

... Package Outline Unit: mm CXA2550M 20 1 0.45 ± 0.1 SONY CODE EIAJ CODE JEDEC CODE SCT Ass 0.45 ± 0.1 SONY CODE EIAJ CODE JEDEC CODE LEAD PLATING SPECIFICATIONS LEAD MATERIAL SOLDER COMPOSITION PLATING THICKNESS 20PIN SOP (PLASTIC) 300mil + 0.4 12.45 – 0 0.1 1.27 0.2 – 0.05 ± 0.12 M PACKAGE STRUCTURE ...

Page 15

... Package Outline Unit: mm CXA2550N ∗6.5 ± 0 0˚ to 10˚ DETAIL A SONY CODE EIAJ CODE JEDEC CODE 20PIN SSOP (PLASTIC 0.65 0.13 M b=0.22 ± 0.03 0.1 0.1 DETAIL B : PALLADIUM NOTE: Dimension "∗" does not include mold protrusion. PACKAGE STRUCTURE PACKAGE MATERIAL LEAD TREATMENT ...

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