AN7243

ICs for FM/AM Tuner AN7243S FM Front-end Circuit for Car Radio s Overview The AN7243S is an FM front-end IC designed for DTS except RF amp. of car radio. It is built-in local oscillation frequency buffer output and PIN diode (ADX) driver for antenna damping. Unit : mm 0.4±0.25 1.24 temper- 0.3 4.2±0.3 6.5±0.3 14-Lead SOP Package (SOP014-P-0225) s Block Diagram GND 14 13 12 11 10 9 8 ADX Driver Mix. IF-Amp. Buffer OSC AGC & Det. Buffer 1 2 3 VCC 4 5 6 7 0.15 0.65 ature characteristics to RF amp. 1.5±0.2 s Features High sensitivity · High S/N ratio Good IM characteristics at strong input Timing for AGC input level is variable. Built-in pre-IF-Amp. having negative (positive) 0.1±0.1 1 2 3 4 5 6 7 14 13 12 11 10 9 8 10.1±0.3 1.27 AN7243S s Absolute Maximum Ratings (Ta=25˚C) Parameter Supply Voltage Supply Current Power Dissipation Operating Ambient Temperature Storage Temperature Symbol VCC ICC PD Topr Tstg Rating 9.6 50 380 –40 ~ + 80 –55 ~ + 125 ICs for FM/AM Tuner Unit V mA mW ˚C ˚C s Recommended Operating Range (Ta=25˚C) Parameter Operating Supply Voltage Range Symbol VCC Range 6.5V ~ 9.6V s Electrical Characteristics (VCC = 8V, fin = 98MHz, 400Hz 30%Modulation, S1 : Open, Ta= 25˚C) Parameter S/N Ratio Local Oscillation Output Level IF Output Level AGC Maximum Sensitivity AGC Level (L) AGC Level (H) AGC Sensitivity Variable Range ADX Drive Current ADX Leak Current IX(max.) IX(leak) Symbol NOUT VOSC VOUT SAGC VAGC(L) VAGC(H) Condition Vi...