GL3361 GL3361 Low Power Narrow Band FM IF Pin Configurations Description The GL3361 is designed for use in FM dual conversion communications equipment. This device contains an Oscillator, Mixer, Limiting Amplifier, Filter Amplifier and OSC1 1 Squelch circuitry. OSC2 Features MIXOUT • Operating Voltage : 2.0 ~ 8.0 V • Low Power Consumption (2.6mA typical @ Vcc=4.0Vdc) VCC • Excellent Input Sensitivity (-3dB limiting=2.6§ Åtypical) LIMIN • Minimum Number of External Parts Required DEC1 • Full ESD Protection • Package Type : 16 DIP/SOP DEC2 QUAD 16 MIXIN 2 15 GND 3 14 MUTE 4 13 SCAN 5 12 SQIN 6 11 FLTOUT 7 10 FLTIN 8 9 AFOUT Block Diagram GND Mute 16 15 14 Squelch Filter input output 12 11 Scan control 13 Filter Amp Filter input 10 - Audio output 9 AF Amp IF input + Squelch Trigger with Hysteresis Demodulator Mixer Limiter Amp Oscillator 1 2 Crystal OSC 3 4 Mixer output Vcc 5 Limiter input 6 7 Decoupling 8 Quad coil The information in this document is subject to change without notice. 1 GL3361 Absolute Maximum Ratings (Ta=25¡ É, unless otherwise noted) Characteristics Pin Symbol Value Unit Power Supply Voltage 4 Vcc(max) 10 Vdc Operating Supply Voltage Range 4 Vcc 2.0 to 8.0 Vdc Operating Temperature Range - Ta 0 to +70 ¡ É Storage Temperature Range - Tstg -65 to +150 ¡ É * Notice : Absolute maximum ratings are values beyond which permanent damage to the device may occur. Electrical Characteristics ( Vcc=4.0Vdc, fo=10.7MHz,¡ â f=¡ ¾ 3kHz,fmod=1.0kHz,Ta=25¡ É, unless otherwise noted ) Spec. Characteristics Symbol Test conditions Units Min Typ Max Icc_off Squelch on ( V12=GND ) 2.0 2.5 3.5 mA Icc_on Squelch off ( V12=1V ) 4.2 5.2 6.2 mA Recovered Audio Output Voltage Vout Vin = 10mVrms 120 160 - § Æ rms Input Limiting Voltage Vin(lim) -3dB limiting - 2.6 6.0 § Å rms Total Harmonic Distortion THD - 0.86 - % Drop Voltage AF Gain Loss ¡ â Gv -3.0 -0.6 - dB Detector Output Impedance Zout - 550 - §Ù Filter Gain Gflt 40 50 - dB Filter Output Voltage Vflt 0.5 0.7 0.9 Vdc Operating Current ( No signal ) Vcc = 4V -> 2V Vin = 0.3mVrms Mute Function Low Rmute_L Squelch on ( V12 = GND ) - 45 - §Ù Mute Function High Rmute_H Squelch off ( V12 = 1V ) - 11 - § Û Scan Function Low Vscan_L Squelch off ( V12 = 1V ) - 0 0.4 V Scan Function High Vscan_H Squelch on ( V12 = GND ) 3.0 3.8 - V - 50 - mV Trigger Hysteresis VTH Squelch on/off Mixer Conversion Gain Gmix - 26 - dB Mixer Input Resistance Ri - 3.3 - § Ú Mixer Input Capacitance Ci - 9.0 - pF 2 GL3361 Pin Descriptions No. Symbol No. Symbol 1 OSC1 The base of the colpitts oscillator Function 9 AFOUT 2 OSC2 The emitter of the colpitts oscillator 10 FLTIN 3 MIXOUT Output of the Mixer 11 FLTOUT Function Recovered audio output Filter amplifier input Filter amplifier output 4 VCC Supply voltage 12 SQIN Squelch input 5 LIMIN Input to the IF amplifier 13 SCAN Scan control output 6 DEC1 IF decoupling 14 MUTE Mute output 7 DEC2 IF decoupling 15 GND Ground 8 QUAD Quadrature tuning coil 16 MIXIN Input of the Mixer Test Circuit Audio Mute Scan Control Squelch SW Input Filter Amp Output Filter Amp Input 510 1.0 0.01 470k 16 15 14 13 12 0.01 1.0 10k 51 AF Output 8.2k Mixer input 10.7MHz 11 10 9 6 7 8 GL3361 1 2 3 5 4 20k 0.1 0.1 FLT 220pF 10.245MHz 68pF Quad Coil Vcc 0.1 C-§ Þ , unless noted FLT - muRata Erie North America Type CFU455D2 or equivalent Quadrature Coil - Toko America Type 7MC-8128Z or equivalent 3 GL3361 Application Circuit SCAN control 1.0k 4.7 RF input 18k 100k Vcc 10 10k 4.7k 0.001 6.8k 470k 0.001 0.1 3.3k 3.3k 16 15 14 13 12 11 10 9 6 7 8 AUDIO output 22k 0.01 0.047 0.022 51 GL3361 1 2 3 4 5 20k 0.1 0.1 FLT 220pF 10.245MHz 68pF Quad Coil 0.1 FLT - muRata Erie North America Type CFU455D2 or equivalent Quadrature Coil - Toko America Type 7MC-8128Z or equivalent Units : R =§ Ù C=§ Þ , unless noted 4