ICs for TV AN5290S Antenna diversity IC for on-vehicle TV ■ Overview 10 11 19 18 17 16 15 14 12 13 • On-vehicle televisions 0.15 0.925 ■ Applications 7.2±0.3 9.4±0.3 0.3 15.3±0.3 5 6 2.0±0.2 7 8 9 24 23 22 21 20 0.1±0.1 • Built-in vertical and horizontal synchronizing circuit • It outputs changeover pulse for noise canceler. • Built-in antenna changeover stop function 0.4±0.25 0.45 ■ Features 1 2 3 4 1.27 Unit: mm 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. SOP024-P-0375A 13 14 VCO 12 Charge pump 11 1/12 divider 10 9 8 V-sync. sepa. Phase det. GND 6 Vertical OSC 5 4 15 16 18 17 ANT select decoder ANT switch control Horizontal OSC 3 2 ANT switch driver ANT select control Sync. control 1 Diversity On/Off switch Noise comparator ANT choice Sync. sepa. 19 20 2nd noise amp. 7 1st noise amp. 21 22 23 24 VCC ■ Block Diagram 1 AN5290S ICs for TV ■ Pin Descriptions Pin No. Description Pin No. 1 Antenna selection level holding capacitance 12 VCO oscillation time-constant setting 2 Sync. separation video signal input 13 Antenna selection output 4 3 Horizontal sync. signal AFC output 14 Antenna selection output 3 4 Horizontal sync. signal oscillation time- 15 Antenna selection output 2 constant setting 16 Antenna selection output 1 5 Horizontal sync. signal output 17 Power supply 6 Output for noise canceler 18 Noise comparator level setting/diversity off 7 Vertical sync. signal output 19 Noise level hold capacitor 8 GND 20 Noise comparator input 9 Vertical sync. signal separation time constant 21 2nd noise amplifier output setting 22 Video clamp input Vertical sync. signal oscillation time constant 23 1st noise amplifier output setting 24 Video signal input 10 11 Description Charge pump integral time-constant setting ■ Absolute Maximum Ratings Parameter Symbol Rating Unit VCC 5.6 V ICC 30.0 mA PD 168 mW Operating ambient temperature Topr −30 to +80 °C Storage temperature Tstg −55 to +125 °C Supply voltage Supply current Power dissipation * 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. 4. * : Ta = 80 °C. ■ Recommended Operating Range Parameter Supply voltage 2 Symbol Range Unit VCC 4.5 to 5.5 V ICs for TV AN5290S ■ Electrical Characteristics at VCC = 5 V, Ta = 25°C Parameter Symbol Quiescent current without load Conditions Min Typ Max Unit 20.0 ICC Without input 12.0 28.0 mA fH Without input, pin 5 frequency 15.58 15.68 15.78 kHz PLL sync. oscillation frequency 12fH Without input, pin 12 frequency 186 188.2 190 kHz Vertical sync. oscillation frequency fV Without input, pin 7 frequency 36.0 42.0 48.0 Hz Electric field judgment period fFJ Without input, pin 21 frequency 36.0 42.0 48.0 Hz Output frequency for N.C. fNC Asynchronous, at changing over antenna, pin 6 frequency 36.0 42.0 48.0 Hz VAS1ON Voltage, when pin 16 is on 0.2 0.5 V Antenna selection 1 off voltage VAS1OFF Voltage, when pin 16 is off 4.9 5.0 V Antenna selection 2 on voltage VAS2ON Voltage, when pin 15 is on 0.2 0.5 V Antenna selection 2 off voltage VAS2OFF Voltage, when pin 15 is off 4.9 5.0 V Antenna selection 3 on voltage VAS3ON Voltage, when pin 14 is on 0.2 0.5 V Antenna selection 3 off voltage VAS3OFF Voltage, when pin 14 is off 4.9 5.0 V Antenna selection 4 on voltage VAS4ON Voltage, when pin 13 is on 0.2 0.5 V Antenna selection 4 off voltage VAS4OFF Voltage, when pin 13 is off 4.9 5.0 V Horizontal sync. oscillation frequency * Antenna selection 1 on voltage 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 Symbol Conditions Min Typ Max Unit 1st amplifier voltage gain AN1 VIN = 10 mV[p-p], fIN = 10 kHz, at 1st amp. active 17.0 dB 2nd amplifier voltage gain AN2 VIN = 10 mV[p-p], fIN = 10 kHz, at 2st amp. active 17.5 dB Output voltage, when 2nd amplifier is on VNON2 At 2st amp. active, pin 21 DC voltage 1.51 V Output voltage, when 2nd amplifier is off VNOF2 At 2nd amp. inactive, pin 21 DC voltage 4.20 V VIN = 50 mV[p-p], fIN = 10 kHz, at input amp. active 5.5 dB At input amp. active, pin 1 DC voltage 1.43 V Antenna input amplifier voltage gain Level hold output bias voltage AC VNOB2 Antenna switch output sink current 1 IAS1 Antenna selection output pin, max. current, when pin 16 is on 10.0 mA Antenna switch output sink current 2 IAS2 Antenna selection output pin, max. current, when pin 15 is on 10.0 mA Antenna switch output sink current 3 IAS3 Antenna selection output pin, max. current, when pin 14 is on 10.0 mA Antenna switch output sink current 4 IAS4 Antenna selection output pin, max. current, when pin 13 is on 10.0 mA 3 AN5290S ICs for TV ■ 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. 5H 6H 7H 8H 9H 1st field video signal Horizontal sync. signal (pin 5) VCO signal (internal clock of IC) Electric field judgment timing (internal clock of IC) 10.593 µs Noise detection output signal (pin 20) Noise detection hold (pin 19) (Electric field judgment level) ANT-1 output (pin 16) ANT-2 output (pin 15) ANT-3 output (pin 14) ANT-4 output (pin 13) Selected antenna 5.296 µs ANT- 1 2 3 4 3 21.186 µs 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.) 4 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. 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) 10.667 µs Noise detection output signal (pin 20) Noise detection hold (pin 19) (Electric field judgment level) ANT-1 output (pin 16) ANT-2 output (pin 15) 5.333 µs ANT-3 output (pin 14) ANT-4 output (pin 13) ANT- 1 2 3 4 Selected antenna 21.333 µs Output for N.C. (pin 6) The antenna selection sequence is as follows: ANT-1 ANT-2 ANT-3 ANT-4 5 AN5290S ICs for TV 1 kΩ 13 1 kΩ Charge pump VCO 390 pF 11 3.9 kΩ 0.12 µF 12 1/12 divider 10 Phase det. 62 kΩ 1 µF (T) 9 220 pF 7 10 kΩ V-sync. sepa. 8 6 10 kΩ 5 600 pF 51 kΩ 2 200 pF 51 kΩ 14 15 1 kΩ 1 kΩ 47 µF 16 100 kΩ 17 18 220 pF 5 Vertical OSC 10 kΩ 4 3 4.7 kΩ 1 µF ANT select decoder ANT switch control Horizontal OSC 2 220 Ω 5 600 pF 1 1 000 pF 10 µF ANT switch driver ANT select control Sync. control 100 kΩ Diversity On/Off switch Noise comparator ANT choice Sync. sepa. 19 20 2nd noise amp. GND 1st noise amp. 21 22 23 24 10 µF SW1 100 pF MA161 VCC 100 pF 1 µF 75 Ω 100 pF 10 µF ■ Application Circuit Example The circuit shows an example of application circuit and circuit constant but does not guarantee the design of massproduction set. 6