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PDF STV0042A Data sheet ( Hoja de datos )
| Número de pieza | STV0042A | |
| Descripción | SATELLITE SOUND AND VIDEO PROCESSORS | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de STV0042A (archivo pdf) en la parte inferior de esta página. Total 24 Páginas | ||
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STV0042A
SATELLITE SOUND AND VIDEO PROCESSORS
SOUND
. TWO INDEPENDENTSOUND DEMODULATORS
. PLL DEMODULATION WITH 5-10MHz
FREQUENCY SYNTHESIS
. PROGRAMMABLE FM DEMODULATOR
BANDWIDTH ACCOMODATING FM DEVIA-
TIONS FROM ±30kHz TILL ±400kHz
. PROGRAMMABLE 50/75µs OR NO DE-EM-
PHASIS
. DYNAMIC NOISE REDUCTION
. ONE OR TWO AUXILIARY AUDIO INPUTS
AND OUTPUTS
. GAIN CONTROLLED AND MUTEABLE
AUDIO OUTPUTS
. HIGH IMPEDANCE MODE AUDIO OUTPUTS
FOR TWIN TUNER APPLICATIONS
VIDEO
. COMPOSITE VIDEO 6-bit 0 to 12.7dB GAIN
CONTROL
. COMPOSITE VIDEO SELECTABLE IN-
VERTER
. TWO SELECTABLE VIDEO DE-EMPHASIS
NETWORKS
. 4 x 2 VIDEO MATRIX
. HIGH IMPEDANCE MODE VIDEO OUTPUTS
FOR TWIN TUNER APPLICATIONS
MISCELLANEOUS
. 22kHzTONE GENERATIONFOR LNB CONTROL
. I2C BUS CONTROL :
CHIP ADDRESSES = 06HEX
. LOW POWER STAND-BY MODE WITH ACTIVE
AUDIO AND VIDEO MATRIXES
DESCRIPTION
The STV0042A BICMOS integrated circuit realizes
all the necessary signal processing from the tuner
to the Audio/Video input and output connectors
regardless the satellite system.
The STV0042 is intended for low cost satellite
receiver application.
PRODUCT PREVIEW
SHRINK42
(Plastic Package)
ORDER CODE : STV0042A
PIN CONNECTIONS
FC R
PK IN
SUM OUT
VOL R
S1 VID OUT
S2 VID OUT
VOL L
S2 VID RTN
S2 OUT L
CLAMP IN
S2 OUT R
UNCL DEEM
VIDEEM2/22kHz
V 12V
VIDEEM1
V GND
B-BAND IN
S2 RTN L
S2 RTN R
FM IN
AGC L
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
42 A GND R
41 FC L
40 PK OUT
39 IREF
38 CPUMP R
37 U75 R
36 DET R
35 AMPLK R
34 A 12V
33 VREF
32 A GND L
31 AGC R
30 AMPLK L
29 U75 L
28 DET L
27 CPUMP L
26 GND 5V
25 VDD 5V
24 XTL
23 SDA
22 SCL
March 1997
1/24
1 page  
GENERAL BLOCK DIAGRAM
STV0042A
From Tuner
From
VCR/Decoder
From Tuner
22kHz to LNB
B-BAND 2
Video
Processing
2
1
FM
Demodulation
2 Channels
Noise
Reduction +
Deemphasis
STV0042A
4x2
Video
Matrix
2
Audio
Matrix
+
Volume
2
I2C Bus
Interface
To TV, VCR/Decoder
Active in Stand-by
VIDEO PROCESSING BLOCK DIAGRAM
LPF
NTSC
PAL
VIDEEM2/22kHz
13
VIDEEM1 UNCL DEEM
15 12
22kHz
TONE
B-BAND IN 17
G ±1
Baseband
CLAMP IN
10 CLAMP
S2 VID RTN
8 CLAMP
Normal
VCR / Decoder Return
Deemphasized
÷2
STV0042A
6
S2 VID OUT
To Decoder or VCR
5
S1 VID OUT
To TV
5/24
5 Page 
STV0042A
DC AND AC ELECTRICAL CHARACTERISTICS (continued)
(VCC = 12V, VDD = 5V, Tamb = 25oC unless otherwise specified)
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
RESET
RTCCU
RTCCD
RTDDU
RTDDD
End of Reset Threshold for VCC
Start of Reset Threshold for VCC
End of Reset Threshold for VDD
Start of Reset Threshold for VDD
VDD = 5V, VCC going up
VDD = 5V, VCC going down
VCC = 12V, VDD going up
VCC = 12V, VDD going down
8.7 V
7.9 V
3.8 V
3.5 V
COMPOSITE SIGNAL PROCESSING
VIDC
ZVI
DEODC
DEOMX
DGV
INVG
VISOG
DEBW
DFG
ITMOD
VID IN
External load current < 1µA
2.25 2.45 2.65 V
VID IN Input Impedance
7 11 14 kΩ
DC Output Level (Pins VIDEEM)
2.25 2.45 2.65 V
Max AC Level before Clipping
(Pins VIDEEM)
GV = 0dB, Reg 01 = 00
2 VPP
Gain error vs GV @ 100kHz
GV = 0 to 12.7dB, Reg 01 = 00 → 3F -0.5 0 0.5 dB
Inverter Gain
-0.9 -1 -1.1
Video Input to SCART Output Gain De-emphasis amplifier mounted in unity -1
gain, Normal video selected
0
1 dB
Bandwidth for 1VPP input
measured on Pins VIDEEM
@ - 3dB with GV = 0dB, Reg 01 = 00 10
MHz
Differential Gain on Sync Pulses GV = 0dB, 1VPP CVBS + 0.5VPP
measured on Pins VIDEEM
25Hz sawtooth (input : VID IN)
1%
Intermodulation of FM subcarriers 7.02 and 7.2MHz sub-carriers,
with chroma subcarrier
12.2dB lower than chroma
-60 dB
CLAMP STAGES (Pins CLAMP IN, S2)
ISKC Clamp Input Sink Current
ISCC Clamp Input Source Current
VIDEO MATRIX
VIN = 3V
VIN = 2V
0.5 1 1.5 µA
40 50 60 µA
XTK
BFG
DCOLVH
ZOUT HV
VCL
Output Level on any Output when
1VPP CVBS input is selected for
any other output
@ 5MHz
Output Buffer Gain
(Pins S1 VID OUT, S2 VID OUT)
@ 100kHz
DC Output Level
High impedance mode
Video Output Impedance
High impedance mode
Sync Tip Level on Selected Outputs 1VPP CVBS through 10nF on input
(Pins S1 VID OUT, S2 VID OUT)
-60 dB
1.87 2 2.13
0 0.2 V
16 23 30 kΩ
1.05 1.3 1.55 V
11/24
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet STV0042A.PDF ] | |
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