CXA2647 Sony Corporation, CXA2647 Datasheet

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CXA2647

Manufacturer Part Number
CXA2647
Description
RF Signal Processor for CD Players
Manufacturer
Sony Corporation
Datasheet
Pin Configuration
Description
compact disc players.
Features
• RF signal processor supporting 6 speed CD
• RF system VCA circuit
• RF system equalizer
• Supports pickups with built-in RF summing
• Low current consumption mode (RF off mode)
• ROM/RW switching mode
• Center error amplifier
• Output DC level shift circuit
• TE balance adjustment function
Functions
• RF AC summing amplifier, equalizer, VCA
• RF DC summing amplifier
• Focus error amplifier
• Tracking error amplifier
• Center error amplifier
• Automatic power control
• VC buffer amplifier (analog block, digital block)
The CXA2647N is an RF signal processing IC for
amplifier
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 Signal Processor for CD Players
30
1
29
2
28
3
27
4
26
5
25
6
24
7
– 1 –
23
8
Absolute Maximum Ratings
• Supply voltage
• Storage temperature
• Allowable power dissipation
Operating Conditions
• Operating supply voltage range
• Operating temperature
22
9
21
10
CXA2647N
20
11
30 pin SSOP (Plastic)
19
12
V
DV
CC
18
13
CC
– GND
– GND 3.0 to 3.6
17
14
V
Tstg –65 to +150
P
Topr –30 to +85
(0V
CC
D
16
15
V
3.0 to 3.6
CC
620
– DV
7
CC
E01997-PS
< 2V)
mW
°C
°C
V
V
V

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CXA2647 Summary of contents

Page 1

... RF Signal Processor for CD Players Description The CXA2647N signal processing IC for compact disc players. Features • RF signal processor supporting 6 speed CD • RF system VCA circuit • RF system equalizer • Supports pickups with built-in RF summing amplifier • Low current consumption mode (RF off mode) • ...

Page 2

... ROM/ RW DVC ROM ROM/ VOFST RW DVC ROM VOFST ROM DVC VOFST DVC or Hi-Z Sleep, APC off – 2 – DC_OFST 29 RFDCI 28 RFDC 21 CEI FEI TE_BAL ROM ROM DVC 14 CXA2647N ...

Page 3

... RFAC system VCA block low frequency gain adjustment. 24 BST I EQ boost level adjustment. 25 VFC I EQ cut-off frequency adjustment. 26 RFC I EQ cut-off frequency adjustment voltage output. 28 RFDC O RFDC signal output. 29 RFDCI I RFDC amplifier virtual ground. 30 DC_OFST I RFDC signal output offset adjustment. Description . CC . – 3 – CXA2647N ...

Page 4

... Equivalent circuit 600 A 100 A 10k 55k 20k 2 20k 3 1. 400 A 400 A 3. 400 A 400 A 500 A — – 4 – CXA2647N Description APC amplifier output. APC amplifier input. Equalizer circuit input. RFAC summing amplifier output. GND. ...

Page 5

... A VC 200k 200k 12 200k VC — 100 14 100 25 – 5 – CXA2647N Description 400 A RFAC summing amplifier, RFDC amplifier, focus error amplifier and center error amplifier input. 100 A 100 A Tracking error amplifier input. CD-ROM/SLEEP/CD-RW switching input. ROM when connected to GND, RW when connected to DV SLEEP mode when connected to DVC or Hi-Z ...

Page 6

... A VC 50k 124 20 VC 124 50 A 500 A 21 – 6 – CXA2647N Description RFAC amplifier output. Focus error amplifier output. Focus error amplifier gain adjustment. The gain is adjusted by the external resistance value connected between this pin and Pin 16. Tracking error amplifier output. ...

Page 7

... VC 100 1.5V 124 26 100 27 100 25 – 7 – CXA2647N Description Input for setting the RFAC low frequency gain with the control voltage. Input for adjusting the equalizer circuit boost level with the control voltage. Input for adjusting the equalizer circuit cut-off frequency with the control voltage ...

Page 8

... VC 1mA 124 24k 30 VC 15k 10k 100 A 400 A – 8 – CXA2647N Description RFDC amplifier output. RFDC amplifier gain adjustment. The gain is adjusted by the 29 external resistance value connected between this pin and Pin 28. Input for adjusting RFDC amplifier offset with the control ...

Page 9

... V CC 100k BST VFC RFC EQ RFAC OFF when BST = V RW: 13.5dB , the RFAC function is turned off and the low consumption mode is CC Gain [dB –8 – 9 – Amp 15 RFAC CC VCA variable range VC – CXA2647N Vcnt [V] ...

Page 10

... The VFC voltage can be varied using this fc as the reference. to Pin 25. The cut-off frequency control characteristics are shown in the graph below – 1 1.0 VFC voltage [V] RFC pin external resistor value 100k : fc = 1.6MHz 33k : fc = 4.8MHz 56k CXA2647N ...

Page 11

... ROM RW VC 10k 20k Resistance value [ ] – 11 – 100k FEI 124 124 50k DVC TE = Gain (F – E) Low frequency gain TE balance adjustment (F – E) low frequency gain = ±6dB 18 TE Cut-off frequency fc (typ.) 30k CXA2647N ROM: 16dB RW: 28dB ROM: 200kHz RW: 150kHz ...

Page 12

... DVC voltage as the reference. 40k 40k DVC VC Control bias VC – ROM RW 24k 96k 15k 10k RFDCI 29 ROM 15k RW 40k 15k 2k 15k 2.4k 3.3k Cut-off frequency fc (typ.) ROM : 15MHz 28.5dB RW – 12 – ) voltage 40k 14 25 40k 5.1k 28 RFDC 124 124 VC : 6MHz CXA2647N ...

Page 13

... Active ROM – 13 – 200k CEI 124 124 50k DVC Cut-off frequency fc (typ.) ROM: 200kHz RW: 200kHz voltage ( The VC buffer is always in active mode even if it enters sleep mode. In the function block, MODE SW is always set to active mode. CXA2647N ) or less in ...

Page 14

... SUM RFAC – 14 – CXA2647N EQ RFAC ...

Page 15

... RFDC – 15 – FE CXA2647N ...

Page 16

... TE – 16 – CXA2647N CE ...

Page 17

... APC AVC DVC – 17 – CXA2647N ...

Page 18

... C D – 18 – 10k 10k 100k 10k 200k E19 20k 10k S11 DV DVC CC S12-1 DVC S12 OUT OUT OUT DVC CC MODE RFAC E F Control OUT CXA2647N ...

Page 19

... Sleep, APC off APC – 19 – <CXA2647N> off DC_OFST 30 RFDCI 29 RFDC 28 VC CEI DVC FEI DVC V TE_BAL 19 ROM ROM DVC 27 14 CXA2647N <DSP> RFAC V CC RFDC ...

Page 20

... Pin 24 BST = VC Pin 23 RFG = control –5 10M 100M 1k – 20 – ROM mode Pin 26 RFC = 100k/33k Pin 25 VFC = control Pin 24 BST = VC Pin 23 RFG = VC RFC = 100k RFC = 33k VFC = VFC = VC VFC = VC VFC = VFC = VC – 1V 100k 1M 10M [Hz] 10k 100k 1M [Hz] CXA2647N 100M 10M ...

Page 21

... TE characteristics Input: Pin 10 E Output: Pin ROM 10M 1k – 21 – CXA2647N Feed back registor 5.1k between Pin 28 & 29 100k 1M 10M [Hz] Input (Pin 10 & 11) registor 200k Pin 19 TE_BAL = VC 10k 100k 1M [Hz] 100M 10M ...

Page 22

... Input: Pin Output: Pin Feed back registor 200k between Pin 20 & ROM 10k 100k [Hz] 3. APC input/output characteristics Input: Pin 2 PD Output: Pin 1 LD 3.5 3.0 2.5 2.0 1.5 1.0 0 10M 0 – 22 – CXA2647N 3.0V CC 0.05 0.1 0.15 Input PD [V] 0.2 ...

Page 23

... SSOP (PLASTIC) 9.7 0 0.65 0.13 M 0.1 0.1 NOTE: Dimension " " does not include mold protrusion. PACKAGE STRUCTURE DETAIL A PACKAGE MATERIAL LEAD TREATMENT SSOP-30P-L01 LEAD MATERIAL P-SSOP30-5.6x9.7-0.65 PACKAGE MASS – 23 – + 0.2 1.25 – 0.1 0.10 A b=0.22 0.03 DETAIL B : PALLADIUM EPOXY RESIN PALLADIUM PLATING COPPER ALLOY 0.1g Sony Corporation CXA2647N ...

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