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ICs for TV
AN5290S
Antenna diversity IC for on-vehicle TV
s Overview
0.40.25 0.45
Unit: mm
1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13
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.
* Built-in vertical and horizontal synchronizing circuit * It outputs changeover pulse for noise canceler. * Built-in antenna changeover stop function
1.27
s Features
0.3
7.20.3 9.40.3
SOP024-P-0375A
s Block Diagram
VCC
24
23
22
21
20
19
18
17
16
15
14
0.15 0.925
* On-vehicle televisions
1st noise amp.
2nd noise amp.
Noise comparator
Diversity On/Off switch
ANT switch driver
ANT choice
ANT select control
ANT select decoder
Sync. control Sync. sepa.
ANT switch control
Phase det.
1/12 divider
Horizontal OSC
3 4 5 6
Vertical OSC
7 8
V-sync. sepa.
9
Charge pump
10 11
VCO
GND
12
1
2
13
2.00.2
s Applications
0.10.1
15.30.3
1
AN5290S
s Pin Descriptions
Pin No. 1 2 3 4 Description Antenna selection level holding capacitance Sync. separation video signal input Horizontal sync. signal AFC output Horizontal sync. signal oscillation timeconstant setting 5 6 7 8 9 Horizontal sync. signal output Output for noise canceler Vertical sync. signal output GND Vertical sync. signal separation time constant setting 10 Vertical sync. signal oscillation time constant setting 11 Charge pump integral time-constant setting Pin No. 12 13 14 15 16 17 18 19 20 21 22 23 24 Description
ICs for TV
VCO oscillation time-constant setting Antenna selection output 4 Antenna selection output 3 Antenna selection output 2 Antenna selection output 1 Power supply Noise comparator level setting/diversity off Noise level hold capacitor Noise comparator input 2nd noise amplifier output Video clamp input 1st noise amplifier output Video signal input
s Absolute Maximum Ratings
Parameter Supply voltage Supply current Power dissipation
*
Symbol VCC ICC PD Topr Tstg
Rating 5.6 30.0 168 -30 to +80 -55 to +125
Unit V mA mW C C
Operating ambient temperature Storage temperature
Note) 1. Except for the power dissipation, operating ambient temperature, and storage temperature, all ratings are for Ta = 25C. 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 k or larger for pin 5, pin 6 and pin 7, and 200 or larger for pin 13, pin 14, pin 15 and pin 16). Use the IC within the range of its power dissipation. 4. * : Ta = 80 C.
s Recommended Operating Range
Parameter Supply voltage Symbol VCC Range 4.5 to 5.5 Unit V
2
ICs for TV
s Electrical Characteristics at VCC = 5 V, Ta = 25C
Parameter Quiescent current without load Horizontal sync. oscillation frequency
*
AN5290S
Symbol ICC fH 12fH fV fFJ fNC
Conditions Without input Without input, pin 5 frequency Without input, pin 12 frequency Without input, pin 7 frequency Without input, pin 21 frequency Asynchronous, at changing over antenna, pin 6 frequency
Min 12.0
Typ 20.0
Max 28.0
Unit mA kHz kHz Hz Hz Hz V V V V V V V V
15.58 15.68 15.78 186 36.0 36.0 36.0 4.9 4.9 4.9 4.9 188.2 42.0 42.0 42.0 0.2 5.0 0.2 5.0 0.2 5.0 0.2 5.0 190 48.0 48.0 48.0 0.5 0.5 0.5 0.5
PLL sync. oscillation frequency Vertical sync. oscillation frequency Electric field judgment period Output frequency for N.C. Antenna selection 1 on voltage
VAS1ON Voltage, when pin 16 is on
Antenna selection 1 off voltage VAS1OFF Voltage, when pin 16 is off Antenna selection 2 on voltage VAS2ON Voltage, when pin 15 is on
Antenna selection 2 off voltage VAS2OFF Voltage, when pin 15 is off Antenna selection 3 on voltage VAS3ON Voltage, when pin 14 is on
Antenna selection 3 off voltage VAS3OFF Voltage, when pin 14 is off Antenna selection 4 on voltage VAS4ON Voltage, when pin 13 is on
Antenna selection 4 off voltage VAS4OFF Voltage, when pin 13 is off
Note) * : The Horizontal oscillation frequency is a frequency after adjustment.
* Design reference data
Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.
Parameter 1st amplifier voltage gain 2nd amplifier voltage gain Output voltage, when 2nd amplifier is on Output voltage, when 2nd amplifier is off Antenna input amplifier voltage gain Level hold output bias voltage Antenna switch output sink current 1 Antenna switch output sink current 2 Antenna switch output sink current 3 Antenna switch output sink current 4
Symbol AN1 AN2 VNON2 VNOF2 AC VNOB2 IAS1 IAS2 IAS3 IAS4
Conditions VIN = 10 mV[p-p], fIN = 10 kHz, at 1st amp. active VIN = 10 mV[p-p], fIN = 10 kHz, at 2st amp. active At 2st amp. active, pin 21 DC voltage At 2nd amp. inactive, pin 21 DC voltage VIN = 50 mV[p-p], fIN = 10 kHz, at input amp. active At input amp. active, pin 1 DC voltage Antenna selection output pin, max. current, when pin 16 is on Antenna selection output pin, max. current, when pin 15 is on Antenna selection output pin, max. current, when pin 14 is on Antenna selection output pin, max. current, when pin 13 is on
Min 10.0 10.0 10.0 10.0
Typ 17.0 17.5 1.51 4.20 5.5 1.43
Max
Unit dB dB V V dB V mA mA mA mA
3
AN5290S
s Technical Information
ICs for TV
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.
5H 1st field video signal 6H 7H 8H 9H
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) (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.) 5.296 s (Electric field judgment level) 10.593 s
ANT- 1 2 3 4 3
21.186 s
4
ICs for TV
s Technical Information (continued)
2. Timing chart 2
AN5290S
* 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 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)
2H
3H
4H
5H
6H
10.667 s
(Electric field judgment level)
5.333 s
ANT- 1 2 3 4
21.333 s
The antenna selection sequence is as follows: ANT-1 ANT-2 ANT-3 ANT-4
5
AN5290S
s Application Circuit Example
ICs for TV
10 F
75 10 F
1 F
100 pF
VCC
SW1
100 k
MA161
100 pF
100 pF
220 pF
47 F
1 k
1 k
1 k
24
23
22
21
20
19
18
17
16
15
14
1st noise amp.
2nd noise amp.
Noise comparator
Diversity On/Off switch
ANT switch driver
ANT choice
ANT select control
ANT select decoder
Sync. control Sync. sepa.
ANT switch control
Phase det.
1/12 divider
Horizontal OSC
Vertical OSC
V-sync. sepa.
Charge pump
VCO
10
11
4.7 k 1 F
10 k
10 k
10 k
GND
51 k
2 200 pF
1 F (T)
1 000 pF
5 600 pF
5 600 pF
0.12 F
220 pF
3.9 k
100 k
220
51 k
The circuit shows an example of application circuit and circuit constant but does not guarantee the design of massproduction set.
6
62 k
390 pF
10 F
12
1
2
3
4
5
6
7
8
9
13
1 k

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