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PDF TDA8205 Data sheet ( Hoja de datos )
| Número de pieza | TDA8205 | |
| Descripción | NICAM QPSK DEMODULATOR | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TDA8205 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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TDA8205
NICAM QPSK DEMODULATOR
. HIGHLY INTEGRATED TWO CHIP SOLU-
. TION FOR NICAM DEMODULATION (using
TDA8204 decoder)
AUTOMATIC DUAL STANDARD DEMODULA-
TION 6.552MHz FOR I SYSTEM
5.85MHz FOR B/G SYSTEM
. 40dB RANGE AGC
. SINGLE CRYSTAL OPERATION
. NICAM 728 DATA AND CLOCK RECOVERY
. LOW PASS FILTER FOR PWM CODED
AUDIO SIGNALS AND J-17 DE-EMPHASIS
. AUTOMATIC FM MONO SELECTION BY RE-
SERVE SOUND SWITCH FUNCTION
. VERSATILE AUDIO SWITCHING MATRIX
. AUTOMATIC MUTE FUNCTION
SHRINK 42
(Plastic Package)
ORDER CODE : TDA8205
PIN CONNECTIONS
DESCRIPTION
The TDA8205 is essentially divided into two signal
processing sections. The first section handles all
the NICAM signal acquisition, the QPSK demodu-
lator and clock and data recovery circuits. The key
point to note about this section is the dual fre-
quency synthesiser. By use of only one quartz
crystal, the IC is able to demodulate QPSK signals
from either system I or system B/G in an automatic
way. The second section of the TDA8205 manages
the analog parts of the twin digital-to-analog con-
verters (DACs) and all filtering and audio switching
downstream of the DACs. A simple serial bus from
the TDA8204 allows control of the switch functions
by the CTV system microcontroller.
October 1993
GND
XC1
XC2
DF2
DF1
BG IN
IIN
AGC
VCC
VDD
LFIL1
RG
GND
RFIL1
RESET
VDD
SERI
DACDL
DACDR
GND
CK11648
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
42 LF1
41 LF2
40 XK1
39 VCC
38 EAIR
37 EAIL
36 SAIR
35 SAIL
34 MAI
33 CAP
32 AMOR
31 AMOL
30 DC2
29 DC1
28 AOR
27 AOL
26 GND
25 MMO
24 TEST
23 NDO
22 CK728
1/8
1 page  
TDA8205
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
DAC AND FILTER (LFIL1, RFIL1)
VDC DC Bias Voltage
IOUT Output Current (RG = 5.6kΩ, DAC full scale)
VRG RG Pin DC Voltage
AUDIO MATRIX (AOL, AOR, AMOL, AMOR)
DAC SELECTED
VOUT
Output Voltage (1kHz at -11.75dB, J17 de-emphasis, RG = 5.6kΩ)
S/N Relative to 0.5VRMS, noise measured with IEC-179 A-filter
THD
1kHz at 0.5VRMS, RG = 5.6kΩ
Crosstalk at 1kHz, 0.5VRMS
Chm
Maximum Channel Matching Error
MONO OR STEREO AUDIO INPUT SELECTED (MAI, SAIL, SAIR)
S/N Relative to 0.5VRMS, noise measured with IEC-179 A-filter
THD
1kHz at 0.5VRMS
STEREO AUDIO INPUT SELECTED
Crosstalk at 1kHz, 0.5VRMS
Chm
Maximum Channel Matching Error
Min.
0.39
60
Typ.
2.5
340
1.25
0.5
70
0.05
65
88
0.02
75
Max. Unit
V
µAPP
V
0.63
0.2
2
VRMS
dB
%
dB
dB
dB
%
dB
2 dB
5/8
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet TDA8205.PDF ] | |
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