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AN7243

Panasonic Semiconductor
Part Number AN7243
Manufacturer Panasonic Semiconductor
Description FM Front-end
Published Mar 26, 2005
Detailed Description ICs for FM/AM Tuner AN7243S FM Front-end Circuit for Car Radio s Overview The AN7243S is an FM front-end IC designed fo...
Datasheet PDF File AN7243 PDF File

AN7243
AN7243

Overview
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 Vin =17dBµ no conversion However, S= output at 400Hz 30%conversion fOSC =108.
7MHz Measured by Pin4, No signal No modulation, Vin = 53dBµ Input level at VAGC = 3V Vin = 72dBµ Vin = 58dBµ At S1ON, difference between input level at VAGC = 3V and AGC maximum sensitivity Vin = 72dBµ Vin = 63dBµ 6 18 20 1 min.
22 160 41 60 typ.
30 250 58 65 0.
02 6.
6 330 82 70 0.
5 max.
Unit dB mV mV dBµ V V dB mA µA s Characteristics Curve IF – Amp.
Input/Output Characteristics 10 120 20 8 6.
6V IF OUT (dBµ) Itot (mA) IA...


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