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SD9885 Schematic ( PDF Datasheet ) - Silan Microelectronics

Teilenummer SD9885
Beschreibung I2C-BUS CONTROLLED SINGLE AND MULTISTANDARD ALIGNMENT-FREE IF-PLL DEMODULATORS
Hersteller Silan Microelectronics
Logo Silan Microelectronics Logo 




Gesamt 19 Seiten
SD9885 Datasheet, Funktion
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






SD9885 Datasheet, Funktion
PIN CONFIGURATION
(1) not connected for SD9885T
(1) not connected for SD9885TS
Bottom view
(1) not connected for SD9885HN
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: //www.silan.com.cn
Downloaded from Elcodis.com electronic components distributor
REV:1.1 2010.01.06
Page 6 of 19

6 Page









SD9885 pdf, datenblatt
AFC4
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Table 5 Automatic frequency control bits.
BIT
AFC3
AFC2
11
11
10
10
01
01
00
00
11
11
10
10
01
01
00
00
AFC1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
fVIF
(f0 187.5 kHz)
f0 162.5 kHz
f0 137.5 kHz
f0 112.5 kHz
f0 87.5 kHz
f0 62.5 kHz
f0 37.5 kHz
f0 12.5 kHz
f0 + 12.5 kHz
f0 + 37.5 kHz
f0 + 62.5 kHz
f0 + 87.5 kHz
f0 + 112.5 kHz
f0 + 137.5 kHz
f0 + 162.5 kHz
(f0 + 187.5 kHz)
2. Write register
1) SUBADDRESS
If more than one data byte is transmitted, then auto-increment is performed: starting from the transmitted
subaddress and auto-increment of subaddress in accordance with the order of Table 6.
Table 6 Denition of the subaddress (second byte after slave address).
REGISTER
SAD for switching mode
SAD for adjust mode
SAD for data mode
MSB
A7(2)
0
0
0
A6(3)
X
X
X
A5(3)
X
X
X
A4(3)
X
X
X
A3(3)
X
X
X
A2(3)
X
X
X
A1
0
0
1
LSB
A0
0
1
0
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: //www.silan.com.cn
Downloaded from Elcodis.com electronic components distributor
REV:1.1 2010.01.06
Page 12 of 19

12 Page





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