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PDF CXA2557 Data sheet ( Hoja de datos )
| Número de pieza | CXA2557 | |
| Descripción | RF Amplifier for CD Player/CD-ROM | |
| Fabricantes | Sony Corporation | |
| Logotipo |  |
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CXA2557R
RF Amplifier for CD Player/CD-ROM
For the availability of this product, please contact the sales office.
Description
The CXA2557R is an RF signal processing IC for
48 pin LQFP (Plastic)
CD players, CD-ROM and CD-RW (playback).
Features
• Wide-band RF AC amplifier
• Supports CD-RW playback (RF DC, RF AC, FE,
TE and AL amplifiers)
• 5-mode RF AC equalizer (active filter type)
• RF AC equalizer boost amount and cut-off frequency
adjustable
• Voltage gain adjustable for RF DC, RF AC, FE, TE
and AL amplifier
• RF DC amplifier offset voltage switchable
• FE and TE amplifier bias voltage adjustable
• Tracking error amplifier cut-off frequency adjustable
• Alignment amplifier
• Center error amplifier
• AGC (Automatic Gain Control) function
• APC (Automatic Power Control) function
• VC/VC IN separation
• Supports laser coupler/3 spots
Structure
Bipolar silicon monolithic IC
Absolute Maximum Ratings (Ta = 25°C)
• Supply voltage
VCC – GND 7
V
• Storage temperature Tstg
–65 to +150 °C
• Power consumption PD
400 mW
Operating Conditions (Ta = 25°C)
• Supply voltage
VCC – GND 3.5 to 5.5 V
• Operating temperature Topr
–20 to +75 °C
Functions
• RF DC summing amplifier
• RF AC summing amplifier
• RF AC equalizer
• Focus error (FE) amplifier
• Tracking error (TE) amplifier
• Alignment (AL) amplifier
• Center error (CE) amplifier
• Mirror circuit
• AGC circuit
• VREF output
Applications
• CD players
• CD-ROM drives
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–
E97757-PS
1 page  
CXA2557R
Pin
No.
Symbol
I/O
8E
9F
I
I
10 TE 1
O
Equivalent circuit
124
8
124
9
124
VCA RW
10
20k
124
11 AL IN I 11
20k
9k
40k
6.2k
13.3k
Description
Tracking error amplifier inputs.
Tracking error amplifier inverted
output.
Alignment amplifier input.
12 AL
O
15k
15k
7.5k
124
12
Alignment amplifier non-inverted
output.
13 AL 1
O
45k
124 Alignment amplifier inverted
34k 13 output.
14 CE IN
I
15 CE 1
O
16 CE
O
124
14
20k
124
15
124
16
Center error amplifier input.
Center error amplifier inverted
output.
Center error drive amplifier
inverted output.
–5–
5 Page 
Pin
No.
Symbol
I/O
47 EQ IN
I
48
RF AC
OUT
O
CXA2557R
Equivalent circuit
1.1k 1.1k
47
5k
1.3k
5k
Description
Equalizer circuit input.
3k 3k
48 RF AC summing amplifier non-
inverted output.
– 11 –
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet CXA2557.PDF ] | |
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