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PDF CXA2515AM Data sheet ( Hoja de datos )
| Número de pieza | CXA2515AM | |
| Descripción | RF Amplifier for CD Player and CD-ROM | |
| Fabricantes | Sony Corporation | |
| Logotipo |  |
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CXA2515AM/AN
RF Amplifier for CD Player and CD-ROM
For the availability of this product, please contact the sales office.
Description
The CXA2515AM/AN is an IC for RF signal
processing of CD player and CD-ROM.
CXA2515AM
20 pin SOP (Plastic)
CXA2515AN
20 pin SSOP (Plastic)
Features
• Wide-band RF amplifier. (RF signal fc ≥ 12MHz)
• RF equalizer (T type)
• EFM time constant can be adjusted
(with switching function)
• APC (Automatic Power Control) function
• Power saving function
• Supports laser coupler
Functions
• RF summing amplifier
• RF equalizer
• Focus error amplifier
• Tracking error amplifier
• APC circuit
Absolute Maximum Ratings
• Supply voltage
VCC
• Storage temperature Tstg
• Allowable power dissipation
PD
7V
–65 to +150 °C
500 mW
Operating Conditions
• Supply voltage
VCC – GND +3.0 to +5.5 V
• Operating temperature Topr
–20 to +75 °C
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–
E96317D8Y
1 page  
Pin
No.
Symbol
I/O
Equivalent circuit
16 BPF_SW O
124
16
VC
18 VCC
124
19 MODE
I
19
50k
50k 30k
CXA2515AM/AN
Description
Transistor switch output
which sets the RF amplifier
BPF boost.
OFF when Pin 19 is
connected to VCC, ON when
it is connected to GND.
VCC.
Multiple-speed mode
switching input.
VCC : High multiple-speed
mode
GND: Low multiple-speed
mode
20 APC_ON I
20
100k
APC amplifier ON/OFF
switching.
OFF when connecting to VCC;
ON when connecting to GND.
–5–
5 Page 
CXA2515AM/AN
Tracking Error Amplifier
The signal current from the photodiode F is I-V converted and input to Pin 9 via an input resistor. The signal
current from the photodiode E is I-V converted, and input to Pin 8 after its gain is adjusted by the volume.
These signals undergo operational amplification at the tracking error amplifier and tracking drive amplifier, and
are output to Pin 12.
11P
VC 5P
62k
100k
I-V
43k
I-V
110k
E
8
F
9
TE1
10
73.4k
320k
VC
TE
12
The low frequency component of TE output voltage is as follows:
VTE =
110k
43k
×
320k
73.4k
× (F – E)
= 11.1 × (F – E)
Center Voltage Generation Circuit
The center voltage of VR = (VCC + GND) is supplied.
The maximum current is approximately ±3mA.
Vcc
40k
Vc Buffer
25 VR
6
40k
Vcc
VC
APC Circuit
When the laser diode is driven with constant current, the optical output possesses large negative temperature
characteristics. Therefore, the current must be controlled with the monitor photodiode to ensure the output
remains constant. When APC_ON pin is connected to GND, APC is ON; connected to VCC, it is OFF.
PD
2
8k
VCC
56k
10k
55k 56k
100µ
1k LD
1
22
10k 10k
1.25V
10µH
1µ
100
500
– 11 –
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet CXA2515AM.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
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