TIGER ELECTRONIC CO.,LTD LOW POWER NARROW BAND FM IF DESCRIPTION MC3361N/D Outline Drawing The MC3361 is designed for use in FM dual conversion communication. It contains a comp lete narrow band FM demodulation system operable to less than 2.0V supply voltage. This low power narrow band FM IF system provides the second converter, second IF, demodulator. Filter Amp and squelch circuitry for communications and scanning receivers. SOP-1 6 FEATURE Operating voltage range : 2.0V ~ 8.0V Low Current consump tion I C C =3.9 mA Typ. (V C C =4 .0 V) Excellent input sensitivity (-3dB Limiting = 2.6 µVrms Typ.) Low number of external parts required Operating frequency up to 60MHz PIN CONFIGURATION DIP-16 1/5 MC3361N/D ABSOLUTE MAXIMUM RATINGS (Ta=25°C) Characteristic Symbol Value Unit Vcc ( M A X ) 10 V Supply Voltage Range Vcc 2.0~8.0 V Detector Input Voltage VIN(DET) 1.0 Vp-p RF Input Voltage VIN(RF) 1.0 Vrms Mute Function VMUTE -0.5~+5.0 Vpeak TJ 150 °C Operating Temperature Topr -30~+70 °C Storage Temperature Tstg -65~150 °C Maximum Supply Voltage Junction Temperature ELECTRICAL CHARACTERISTICS (Unless otherwise specified: Ta=25°C, Vcc=4V, fo=10.7MHz, fm=1kHz, ∆f=±3kHz) Characteristics Squelch Current Audio Output Vo ltage Input Limiting Vo ltage To tal Harmonic Distortion Recovered Output Noise Vo ltage Drop Vo ltage AF Gain Loss Detector Output Resistance Signal to Noise Ratio Symbol Test conditions Min Typ Max Unit ICC1 Squelch off (V 1 2 =2V) 2.9 3.9 4.9 ICC2 Squelch on (V 1 2 =0V) 4.4 5.4 6.4 VOUT Vin=10mVrms 130 160 200 mV r m s VIN(Lim) -3dB Limiting 2.0 6.0 µV THD V O U T =170mVrms 0.8 VNO No Input Signal 60 80 ∆Gv Vcc=4V → 2V -3 -0.6 dB 450 Ω 36 67 dB 40 50 dB 1.0 1.3 ROUT S/N Filter Gain Filter Output DC Vo ltage Mute Low Resistance Gv Vin=5mVrms, f=10kHz RON(Mute) Mute Switch-on Mute High Resistance ROff(Mute) Mute Switch-off VO(DC) Scan Control Low VL(Scan) Mute off(V 1 2 =2V) Scan Control High VH(Scan) Mute on(V 1 2 =0V) Trigger Hysteresis VTH Squelch on/off 1.0 % 250 1.6 mV r m s VDC 10 Ω 10 MΩ 0 3.0 mA 0.4 3 .5 45 VDC VDC 100 mV r m s Mixer Conversion Gain GV(Mix) 28 dB Mixer Input Resistance Ri(Mix) 3.3 kΩ Mixer Input Capacitance Ci(Mix) 2.2 pF 2/5 MC3361N/D BLOCK DIAGRAM AND TEST CIRCUIT 16 510 470K 15 14 13 12 8.2K 1.0uF 1.0uF 51 AF Out Filter In 9 10 11 0.01uF Audio Sca n SQ SW Mute Control Input Filter Out 10K 0.01uF Mixe r Input 10.7MHz AF Am p Filter Am p + Squelc h Trigge r with Hyste resis De modulator Lim iter Am p CFU 455D 1.8K 6 7 8 20K MURATA 5 0.1uF 4 0.1uF Vc c FL1 10.245 MHz 220pF 68pF 3 0.1uF 2 52K 1.8K Osc illator 1 50K Mixe r 10pF 3/5 MC3361N/D APPLICATION CIRCUIT TYPICAL PERFORMANCE CHARACTERISTICS 4/5 MC3361N/D 5/5