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Número de pieza | SD9885 | |
Descripción | I2C-BUS CONTROLLED SINGLE AND MULTISTANDARD ALIGNMENT-FREE IF-PLL DEMODULATORS | |
Fabricantes | Silan Microelectronics | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de SD9885 (archivo pdf) en la parte inferior de esta página. Total 19 Páginas | ||
No Preview Available ! I2C-BUS CONTROLLED SINGLE AND MULTISTANDARD ALIGNMENT-FREE
IF-PLL DEMODULATORS
DESCRIPTION
The SD9885 is an alignment-free multistandard (PAL and NTSC)
vision and sound IF signal PLL demodulator for negative modulation
only and FM processing.
The SD9886 is an alignment-free multistandard(PAL, SECAM and
NTSC) vision and sound IF signal PLLdemodulator for positive and
negative modulation,including sound AM and FM processing.
FEATURES
∗ 5 V supply voltage
∗ Gain controlled wide-band Vision Intermediate Frequency (VIF)
amplifier, AC-coupled
∗ Multistandard true synchronous demodulation with active
carrier regeneration
∗ Fully integrated VIF Voltage Controlled Oscillator (VCO),
alignment-free, frequencies switchable for all negative and
positive modulated standards via I2C-bus
∗ Digital acquisition help, VIF frequencies of 33.4, 33.9, 38.0,
38.9, 45.75, and 58.75 MHz
∗ 4 MHz reference frequency input
∗ VIF Automatic Gain Control (AGC) detector for gain control
∗ External AGC setting via pin OP1
∗ Precise fully digital Automatic Frequency Control (AFC)
detector with 4-bit digital-to-analog converter, AFC bits
readable via I2C -bus
∗ TakeOver Point (TOP) adjustable via
I2C -bus or alternatively with
potentiometer
∗ Fully integrated sound carrier trap for
4.5, 5.5, 6.0, and 6.5 MHz, controlled
by FM-PLL oscillator
APPLICATIONS
∗ TV, VTR, PC and STB applications.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: //www.silan.com.cn
Downloaded from Elcodis.com electronic components distributor
REV:1.1 2010.01.06
Page 1 of 19
1 page Characteristics
Symbol
Conditions
Min. Typ. Max.
Audio part
AF Output Voltage (RMS
Value)
Total Harmonic Distortion Of
Audio Signal
-3dB AF Bandwidth
Weighted Signal-To-Noise
Ratio Of Audio Signal
AM Suppression Of FM
Demodulator
Power Supply Ripple
Rejection On Pin AUD
Vo(AF)(rms)
THD
BAF(-3dB)
S/NW(AF)
αAM(sup)
PSRRAUD
27 kHz FM deviation; 50
µs de-emphasis
FM: 27 kHz FM deviation;
50 µs de-emphasis
AM: m = 54 %
without de-emphasis;
dependent on FM-PLL
filter
FM: 27 kHz FM deviation;
50 µs de-emphasis; vision
carrier unmodulated
AM: m = 54 %
50 µs de-emphasis; AM: f
= 1 kHz and m = 54 %;
referenced to 27 kHz FM
deviation
fripple = 70 Hz;
for AM
for FM
430
−
−
80
52
45
40
20
14
540
0.15
0.5
100
56
50
46
26
20
650
0.5
1
−
−
−
−
−
−
QSS mode; SC1; SC2 off 90 140 180
IF Intercarrier Output Level
(RMS Value)
Vo(intc)(rms)
L standard; without
modulation
intercarrier mode;
PC/SC1 = 20 dB; SC2 off;
90
140 180
75
Reference Frequency
Reference Signal Frequency
fref
−4−
Reference Signal Voltage
(RMS Value)
Vref(rms)
operation as input
terminal
90(1)
−
400
(1) The minimum reference signal voltage is 90mV, higher than TDA9885/6 by 10mV.
Unit
mV
%
%
KHz
dB
dB
dB
dB
dB
mV
mV
mV
MHz
mV
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: //www.silan.com.cn
Downloaded from Elcodis.com electronic components distributor
REV:1.1 2010.01.06
Page 5 of 19
5 Page I2C BUS CONTROL
1. Read register
1) SLAVE ADDRESS
The first module address MAD1 is the standard address (see Table 1). Table 2 Slave addresses.
SLAVE ADDRESS
Table 2 Slave addresses
BIT
NAME
VALUE (HEX)
A6
A5
A4
A3
A2
A1
A0
MAD1
MAD2
MAD3
MAD4
43
42
4B
4A
1000011
1000010
1001011
1001010
2) DATA BYTE
MSB
D7
AFCWIN
Table 3 Data read register (status register)
D6
VIFLEV
D5
CARRDET
D4
AFC4
D3
AFC3
D2
AFC2
D1
AFC1
LSB
D0
PONR
BIT VALUE
AFCWIN
1
0
VIFLEV
1
0
CARRDET 1
0
AFC[4:1]
PONR
1
0
Table 4 Description of status register bits
DESCRIPTION
AFC window
VCO in ±1.6 MHz AFC window;
VCO out of ±1.6 MHz AFC window
VIF input level
high level; VIF input voltage ≥200 µV (typically)
low level
FM carrier detection
Detection
no detection
Automatic frequency control
see Table 5
Power-on reset
after Power-on reset or after supply breakdown
after a successful reading of the status register
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: //www.silan.com.cn
Downloaded from Elcodis.com electronic components distributor
REV:1.1 2010.01.06
Page 11 of 19
11 Page |
Páginas | Total 19 Páginas | |
PDF Descargar | [ Datasheet SD9885.PDF ] |
Número de pieza | Descripción | Fabricantes |
SD9885 | I2C-BUS CONTROLLED SINGLE AND MULTISTANDARD ALIGNMENT-FREE IF-PLL DEMODULATORS | Silan Microelectronics |
SD9886 | I2C-BUS CONTROLLED SINGLE AND MULTISTANDARD ALIGNMENT-FREE IF-PLL DEMODULATORS | Silan Microelectronics |
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