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ICs for TV
AN5290S
Antenna diversity IC for on-vehicle TV
■ Overview
The AN5290S is an on-vehicle television antennadiversity IC in which the noise detection circuit and antenna changeover circuit are integrated on a single chip.
It is destined for NTSC/PAL system.
■ Features
• Built-in vertical and horizontal synchronizing circuit
• It outputs changeover pulse for noise canceler.
• Built-in antenna changeover stop function
■ Applications
• On-vehicle televisions
■ Block Diagram
24
23
22
21
20
19
18
17
Unit: mm
14
24
23
22
21
20
19
18
17
16
15
14
13
0.15
0.925
15.3±0.3
2.0±0.2
13
1
2
3
4
5
0.4±0.25 0.451.27
6
7
8
9
10
11
12
0.1±0.1
0.3
CC
V
7.2±0.3
9.4±0.3
SOP024-P-0375A
16
15
1st noise
amp.
Sync.
sepa.
1
ANT
choice
2
2nd noise
amp.
Sync.
control
Horizontal
3
OSC
4
Noise
comparator
select control
switch control
5
Diversity
On/Off
switch
ANT
ANT
switch driver
ANT
select decoder
11
1/12
divider
VCO
12
ANT
Phase
det.
Vertical
OSC
6
7
V-sync.
sepa.
8
Charge
pump
9
10
GND
1
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AN5290S ICs for T V
■ Pin Descriptions
Pin No. Description
1 Antenna selection level holding capacitance
2 Sync. separation video signal input
3 Horizontal sync. signal AFC output
4 Horizontal sync. signal oscillation time-
constant setting
5 Horizontal sync. signal output
6 Output for noise canceler
7 Vertical sync. signal output
8 GND
9 Vertical sync. signal separation time constant
setting
10 Vertical sync. signal oscillation time constant
setting
11 Charge pump integral time-constant setting
Pin No. Description
12 VCO oscillation time-constant setting
13 Antenna selection output 4
14 Antenna selection output 3
15 Antenna selection output 2
16 Antenna selection output 1
17 Power supply
18 Noise comparator level setting/diversity off
19 Noise level hold capacitor
20 Noise comparator input
21 2nd noise amplifier output
22 Video clamp input
23 1st noise amplifier output
24 Video signal input
■ Absolute Maximum Ratings
Parameter Symbol Rating Unit
Supply voltage V
Supply current I
Power dissipation
*
Operating ambient temperature T
Storage temperature T
Note) 1. Except for the power dissipation, operating ambient temperature, and storage temperature, all ratings are for Ta = 25°C.
2. In order to protect the IC, do not use the IC by rotating it 180 degrees.
3. To protect the IC, do not connect the open collector pins (pin 5, pin 6, pin 7, pin 13, pin 14, pin 15 and pin 16) directly to
the power supply. Use the protection resistors (1 kΩ or larger for pin 5, pin 6 and pin 7, and 200 Ω or larger for pin 13, pin
14, pin 15 and pin 16). Use the IC within the range of its power dissipation.
: Ta = 80 °C.
4. *
CC
CC
P
D
opr
stg
5.6 V
30.0 mA
168 mW
−30 to +80 °C
−55 to +125 °C
■ Recommended Operating Range
Parameter Symbol Range Unit
Supply voltage V
CC
4.5 to 5.5 V
2
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ICs for TV AN5290S
■ Electrical Characteristics at VCC = 5 V, Ta = 25°C
Parameter Symbol Conditions Min Typ Max Unit
Quiescent current without load I
Horizontal sync. oscillation frequency
*f
PLL sync. oscillation frequency 12fHWithout input, pin 12 frequency 186 188.2 190 kHz
Vertical sync. oscillation frequency
Electric field judgment period f
Output frequency for N.C. f
Antenna selection 1 on voltage V
Antenna selection 1 off voltage V
Antenna selection 2 on voltage V
Antenna selection 2 off voltage V
Antenna selection 3 on voltage V
Antenna selection 3 off voltage V
Antenna selection 4 on voltage V
Antenna selection 4 off voltage V
Note)*: The Horizontal oscillation frequency is a frequency after adjustment.
Without input 12.0 20.0 28.0 mA
CC
Without input, pin 5 frequency 15.58 15.68 15.78 kHz
H
f
Without input, pin 7 frequency 36.0 42.0 48.0 Hz
V
Without input, pin 21 frequency 36.0 42.0 48.0 Hz
FJ
Asynchronous, at changing over 36.0 42.0 48.0 Hz
NC
antenna, pin 6 frequency
Voltage, when pin 16 is on 0.2 0.5 V
AS1ON
Voltage, when pin 16 is off 4.9 5.0 V
AS1OFF
Voltage, when pin 15 is on 0.2 0.5 V
AS2ON
Voltage, when pin 15 is off 4.9 5.0 V
AS2OFF
Voltage, when pin 14 is on 0.2 0.5 V
AS3ON
Voltage, when pin 14 is off 4.9 5.0 V
AS3OFF
Voltage, when pin 13 is on 0.2 0.5 V
AS4ON
Voltage, when pin 13 is off 4.9 5.0 V
AS4OFF
• Design reference data
Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.
Parameter Symbol Conditions Min Typ Max Unit
1st amplifier voltage gain A
VIN = 10 mV[p-p], fIN = 10 kHz, 17.0 dB
N1
at 1st amp. active
2nd amplifier voltage gain A
VIN = 10 mV[p-p], fIN = 10 kHz, 17.5 dB
N2
at 2st amp. active
Output voltage, when 2nd V
At 2st amp. active, 1.51 V
NON2
amplifier is on pin 21 DC voltage
Output voltage, when 2nd V
At 2nd amp. inactive, 4.20 V
NOF2
amplifier is off pin 21 DC voltage
Antenna input amplifier voltage A
VIN = 50 mV[p-p], fIN = 10 kHz, 5.5 dB
C
gain at input amp. active
Level hold output bias voltage V
At input amp. active, 1.43 V
NOB2
pin 1 DC voltage
Antenna switch output sink I
Antenna selection output pin, 10.0 mA
AS1
current 1 max. current, when pin 16 is on
Antenna switch output sink I
Antenna selection output pin, 10.0 mA
AS2
current 2 max. current, when pin 15 is on
Antenna switch output sink I
Antenna selection output pin, 10.0 mA
AS3
current 3 max. current, when pin 14 is on
Antenna switch output sink I
Antenna selection output pin, 10.0 mA
AS4
current 4 max. current, when pin 13 is on
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AN5290S ICs for T V
■ Technical Information
Note) The following characteristics are the reference value for design and not guaranteed value. The timing chart is for explaining
the IC operation plainly. Those vary depending on input condition.
1. Timing chart 1
• When NTSC 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.
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)
5H
6H 7H 8H 9H
10.593 µs
(Electric field judgment level)
ANT
-12343
5.296 µs
21.186 µs
(In the above timing chart, the 1st field video signal is not an internal signal but an
input signal, and some signals which do not outputted to pins, as VCO signal, are
included.)
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ICs for TV AN5290S
■ 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.
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)
1H
2H 3H 4H 5H 6H
10.667 µs
(Electric field judgment level)
5.333 µs
ANT
-1234
21.333 µs
The antenna selection sequence is as follows:
ANT-1 ANT-2 ANT-3 ANT-4
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AN5290S ICs for T V
■ Application Circuit Example
V
CC
100 pF
SW1
220 pF
1 kΩ
47 µF
100 kΩ
1 kΩ
1 kΩ
1 kΩ
75 Ω
10 µF
10 µF
1 µF
MA161
100 pF
100 pF
24
1st noise
amp.
23
ANT
choice
22
2nd noise
amp.
Sync.
control
21
20
Noise
comparator
select control
switch control
19
ANT
ANT
18
17
Diversity
On/Off
switch
16
15
14
ANT
switch driver
ANT
select decoder
Phase
det.
13
1/12
divider
Sync.
sepa.
Horizontal
OSC
1
10 µF
100 kΩ
1 000 pF
220 Ω
2
5 600 pF
3
1 µF
4.7 kΩ
51 kΩ
51 kΩ
2 200 pF
4
5
10 kΩ
5 600 pF
Vertical
OSC
6
10 kΩ
7
10 kΩ
8
GND
V-sync.
sepa.
9
220 pF
Charge
pump
10
1 µF (T)
VCO
11
0.12 µF
62 kΩ
12
3.9 kΩ
390 pF
The circuit shows an example of application circuit and circuit constant but does not guarantee the design of massproduction set.
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