ICs for TV AN7299S Antenna diversity IC for car TV ■ Overview The AN7299S is an antenna diversity IC for car TV. A noise detection circuit and an antenna changeover circuit are integrated on one chip. ■ Applications 5 6 10 11 19 18 17 16 15 14 12 13 0.3 0.15 0.925 0.1±0.1 • Car TVs 3 4 7.2±0.3 9.4±0.3 15.3±0.3 7 8 9 24 23 22 21 20 2.0±0.2 • Built-in vertical and horizontal synchronizing circuit • Built-in antenna fixing function • It outputs a composite synchronous signal 0.4±0.25 0.45 ■ Features 1 2 1.27 Unit : mm SOP024-P-0375A 1st noise amp. Video clamp 2nd noise amp. 13 14 ANT switch driver ANT select control ANT select decoder ANT switch control Sync separater 15 16 ANT select switch Noise comparator ANT choice 17 18 19 20 21 22 23 24 ■ Block Diagram Phase detector 1/5 divider Charge pump VCO Sync control V-sync separater 12 11 10 9 8 6 5 4 3 2 1 7 Vertical OSC Horizontal OSC 1 AN7299S ICs for TV ■ Pin Descriptions Pin No. Description Pin No. Description 1 Antenna selection level-hold capacitor 12 VCO oscillation time-constant setting 2 Sync separation video signal input 13 Antenna selection output 4 3 Horizontal synchronizing signal AFC output 14 Antenna selection output 3 4 Horizontal synchronizing signal oscillation 15 Antenna selection output 2 time constant setting 16 Antenna selection output 1 5 Horizontal synchronizing signal output 17 Power supply 6 Composite synchronizing signal output 18 Noise comparator level setting 7 Vertical synchronizing signal output 8 GND 19 Noise level hold capacitor 9 Vertical synchronizing signal separation 20 Noise comparator input time constant setting 21 2nd noise amplifier output Vertical synchronizing signal oscillation 22 Video clamp input time constant setting 23 1st noise amplifier output Charge pump integral time-constant setting 24 Video signal input 10 11 /Antenna fixing ■ Absolute Maximum Ratings Parameter Symbol Rating Unit VCC 5.5 V ICC 25 mA PD 180 mW Topr −35 to +85 °C Tstg −55 to +125 °C Supply voltage Supply current Power dissipation *2 Operating ambient temperature Storage temperature *1 *1 Note) *1 : All items are at Ta = 25°C, except for the operating ambient temperature and storage temperature. *2 : Ta = 85°C ■ Recommended Operating Range Parameter Supply voltage 2 Symbol Range Unit VCC 4.5 to 5.5 V ICs for TV AN7299S ■ Electrical Characteristics at VCC = 5 V ,Ta = 25°C Parameter Symbol Quiescent current without load ISCC 1st amplifier voltage gain AN1 1st amplifier input clamp voltage Conditions Min Typ Max Unit 8.5 11.9 17.7 mA VIN = 10 mVPP, f = 10 kHz 15.3 17.0 18.2 dB VCL1 Pin 24 DC voltage 1.87 2.00 2.15 V 1st amplifier output bias voltage VNOB1 Pin 23 DC voltage 2.11 3.07 3.86 V 2nd amplifier voltage gain AN2 VIN = 10 mV[p-p], f = 10 kHz, at 2nd amp. active 16.3 17.5 18.5 dB 2nd amplifier input clamp voltage VCL2 Pin 22 DC voltage at 2nd amp. active 1.96 2.11 2.29 V 2nd amplifier output bias voltage VNOB2 Pin 21 DC voltage at 2nd amp. active 0.78 1.51 2.10 V Noise hold input bias current INHB Pin 19 DC current 40.0 110.0 240.0 nA Noise comparator input bias current INCB Pin 20 DC current 200.0 426.0 820.0 nA Noise level setting input bias current INRB Pin 18 DC current 350.0 548.0 950.0 nA Antenna input amplifier voltage gain AC VIN = 50 mV[p-p], f = 10 kHz, at input amp. active 4.5 5.5 6.4 dB Level hold output bias voltage VLOB Pin 1 DC voltage at input amp. active 0.94 1.43 1.91 V Level hold output bias current ILOB Pin 1 DC voltage at input amp. non-active 20.0 56.4 100.0 nA Sync separation input clamp voltage VSCL Pin 2 DC voltage 2.92 3.13 3.32 V Sync separation comparator on-state current ISCN Pin 2 DC current when pin 6 becomes low to high 93.0 116.9 149.3 µA Composite sync separation output sink current IVH Pin 6 current, when pin 6 voltage becomes lower than 0.5 V 1.0 5.0 mA Vertical sync separation block on-state voltage VVSON Applied voltage to pin 9 when pin 7 becomes low to high 3.94 4.17 4.40 V Vertical synchronization time constant sink current IVSN RSET = 100 kΩ, pin 9 DC current 8.82 12.19 17.71 µA Vertical synchronization time constant source current IVSP RSET = 10 kΩ, pin 9 DC current 42.57 51.14 62.64 µA Vertical synchronizing oscillation block on-state voltage VVON Applied voltage to pin 10 when pin 7 becomes low to high 2.78 2.94 3.15 V Vertical synchronizing oscillation block schmidt voltage VVSW Difference between pin 10 DC voltage and VVON high to low 0.83 0.90 1.01 V Vertical synchronizing oscillation block on-state voltage VVLON Applied voltage to pin 10 when pin 7 becomes low to high 2.47 2.65 2.79 V Vertical synchronization output sink current IV Pin 7 current, when pin 7 voltage becomes 0.5 V or less 1.0 5.0 mA 3 AN7299S ICs for TV ■ Electrical Characteristics at VCC = 5 V ,Ta = 25°C Parameter Symbol Horizontal synchronizing oscillation block on-state voltage VHON Horizontal synchronizing oscillation block schmidt voltage Conditions Min Typ Max Unit Applied voltage to pin 4 when pin 5 becomes low to high 2.80 3.00 3.18 V VHSW Applied voltage to pin 4 when Pin 5 becomes high to low 0.82 0.94 1.05 V AFC sink current IHAN V4 = VL, pin 3 DC current 127.2 160.0 206.0 µA AFC source current IHAP V4 = VH, Pin 3 DC current 124.1 158.0 206.6 µA Horizontal synchronization sink current IH Pin 5 current, when pin 5 voltage becomes under 0.5 V 1.0 5.0 mA Antenna switch output sink current IAS Antenna selection output pin on-state time DC current 10.0 30.0 mA VCO time constant sink current IVCN V12 = 1.5 V, pin 12 current 81.40 115.0 166.3 µA VCO time constant source current IVCP V12 = 4 V, pin 12 current 81.40 114.8 166.3 µA Charge pump sink current ICCN Pin 11 current after test signal 1 input 80.39 101.7 138.2 µA Charge pump source current ICCP Pin 11 current after test signal 2 input 80.39 108.3 138.2 µA ■ Application System Example Antenna changeover Diversity control Tuner SIF/VIF AN7299S Sound multiplex noise canceler Sound signal control Sound output Video signal processing Video color signal processing Chroma signal output Control circuit 4 X driver Y driver LCD panel