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PDF AN5290S Data sheet ( Hoja de datos )
| Número de pieza | AN5290S | |
| Descripción | Antenna diversity IC for on-vehicle TV | |
| Fabricantes | Panasonic Semiconductor | |
| Logotipo |  |
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ICs for TV
AN5290S
Antenna diversity IC for on-vehicle TV
s Overview
The AN5290S is an on-vehicle television antenna-
diversity IC in which the noise detection circuit and an-
tenna changeover circuit are integrated on a single chip.
It is destined for NTSC/PAL system.
s Features
• Built-in vertical and horizontal synchronizing circuit
• It outputs changeover pulse for noise canceler.
• Built-in antenna changeover stop function
s Applications
• On-vehicle televisions
Unit: mm
1 24
2 23
3 22
4 21
5 20
6 19
7 18
8 17
9 16
10 15
11 14
12 13
0.3 7.2±0.3
9.4±0.3
SOP024-P-0375A
s Block Diagram
1st noise
amp.
2nd noise
amp.
ANT
choice
Noise
comparator
Diversity
On/Off
switch
ANT
select control
ANT
switch driver
ANT
select decoder
Sync.
sepa.
Sync.
control
Horizontal
OSC
ANT
switch control
Vertical
OSC
Phase
det.
1/12
divider
V-sync. Charge
sepa. pump
VCO
1
1 page  
ICs for TV
AN5290S
s Technical Information (continued)
2. Timing chart 2
• When PAL reception (in horizontal and vertical synchronization) antenna is selected.
Electric field judgment and antenna selection timing when the change over from ANT-1 to ANT-3 by the
antenna selection is done.
1H 2H 3H 4H 5H 6H
1st field video signal
Horizontal sync. signal
(pin 5)
VCO signal
(internal clock of IC)
Electric field judgment timing
(Internal clock of IC)
Noise detection output
signal (pin 20)
Noise detection hold
(pin 19)
ANT-1 output
(pin 16)
ANT-2 output
(pin 15)
ANT-3 output
(pin 14)
ANT-4 output
(pin 13)
Selected antenna
Output for N.C.
(pin 6)
10.667 µs
(Electric field judgment level)
5.333 µs
ANT- 1 2 3 4 21.333 µs
The antenna selection sequence is as follows:
ANT-1 ANT-2 ANT-3 ANT-4
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet AN5290S.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AN5290 | Antenna diversity IC for on-vehicle TV | Panasonic Semiconductor |
| AN5290S | Antenna diversity IC for on-vehicle TV | Panasonic Semiconductor |
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