UTC CXA1191 LINEAR INTEGRATED CIRCUIT FM/AM Radio DESCRIPTION The UTC CXA1191 is a one-chip FM/AM radio IC designed for radio-cassette tape recorders and headphone tape recorders. SOP-28 FEATURES *Small number of peripheral components *Low current consumption (Vcc=3V) FM: lD=5.3mA (Typ.) AM: lD=3.4mA (Typ.) *Built-in FM/AM select switch *Large current of AF amplifier DIP-28 FUNCTIONS FM section RF amplifier, Mixer and OSC (incorporating AFC variable capacitor) IF amplifier Quadrature detection Tuning LED driver AM section RF amplifier, Mixer and OSC (with RF AGC) IF amplifier (with IF AGC) Detector Tuning LED driver AF section Electronic volume control FM muting Structure Bipolar silicon monolithic IC ABSOLUTE MAXIMUM RATINGS(Ta=25°C) PARAMETER Supply voltage Operating temperature Storage temperature Allowable power dissipation UTC SYMBOL VALUE UNIT Vcc Topr Tstg PD 9 -10 ~ +60 -50 ~ +125 700 (SOP-28) 1000 (DIP-28) V °C °C mW UNISONIC TECHNOLOGIES CO., LTD. 1 UTC CXA1191 LINEAR INTEGRATED CIRCUIT RECOMMENDED OPERATING CONDITIONS PARAMETER Supply voltage SYMBOL VALUE UNIT Vcc Vcc 2 ~ 7.5 (SOP-28) 2 ~ 8.5 (DIP-28) V V BLOCK DIAGRAM GND AF OUT Vcc RIPPLE FILTER 28 27 26 25 AF IN DET OUT 24 23 AFC AQC AFC AQC 22 21 IF END 20 METER 19 NC 18 FM IF IN 17 AM IF IN FM/AM BAND SELECT 16 15 AM IF DET AGC AF POWER AMP TUNING METER AM FE FM IF FM DISCRIMINATOR FM FE 1 MUTE 2 FM DISCRI UTC 3 4 5 6 7 8 9 10 11 12 13 14 NF VOL AM OSC AFC FM OSC RUG OUT FM RF AM RF IN NC FW RF IN FM GND FM/AM IF OUT UNISONIC TECHNOLOGIES CO., LTD. 2 UTC CXA1191 LINEAR INTEGRATED CIRCUIT PIN CONFIGURATIONS PIN SYMBOL 1 MUTE 2 FM DISCRI EQUIVALENT CIRCUIT VOLTAGE(V) Vcc=3V DESCRIPTION Vcc=6V FM AM FM 0 0 0 AM 0 2.18 2.7 4.88 5.43 Phase-shift circuit, 2 Connect ceramic 1K discriminator. 2K 3 27 NF 1.5 AF OUT 1.5 1.5 1.5 3.0 3.0 Vcc 3.0 X100 3.0 27 Negative feedback pin Power amplifier output pin X100 GND 3 4 VOL CONT 1.25 1.25 1.25 4 1.25 Connect variable resistor for electronic volume 20K control. 80K GND 5 AM OSC 1.25 1.25 1.25 1.25 AM local oscillation circuit 5 3.6K 6 AFC 1.25 * 1.25 * 8 REG OUT 1.25 1.25 1.25 1.25 6 7 FM OSC 1.25 1.25 1.25 1.25 7 8 AFC variable capacitor pin 1.25V Regulator pin 1.25V REG (Typ.) UTC FM local oscillation circuit UNISONIC TECHNOLOGIES CO., LTD. 3 UTC CXA1191 LINEAR INTEGRATED CIRCUIT 9 FM RF 1.25 1.25 1.25 1.25 12 FM RF IN 0.3 0 0.3 0 9 Connect FM RF tuning 1.25V 12 coil. BK FM RF input pin 10 AM RF input 1K 10 AM RF IN 1.25 1.25 1.25 1.25 Vcc 11 NC 0 0 0 13 GND (FE GND) 0 0 0 0 0 14 FM/AM FE 0.36 0.2 0.36 0.2 AM IF output pin of FM and FM OUT AM, Connect IF filter 220 14 15 BAND SELECT 0.84 0 0.88 Vcc 0 FM and AM bands selection switch pin. During GND it becomes 10K AM and during open it 15 becomes FM. GND 16 AM IF IN 0 0 0 0 Input pin of AM IF 16 2K 17 FM IF IN 0.34 0 0.88 0 Input pin of FM IF 10 17 360 24K 24K 5.6K GND 18 NC UTC 0 0 0 0 UNISONIC TECHNOLOGIES CO., LTD. 4 UTC CXA1191 19 METER LINEAR INTEGRATED CIRCUIT 1.6 1.6 4.5 4.5 Meter drive circuit 19 (For tuning indicator) 1.25V N GND 20 GND 21 AFC/AGC 0 0 0 0 1.25 1.49 1.25 1.49 AFC pin of W band. 22 During AM, it determines time constant of AGC. 22 AFC/AGC 1.25 1.25 1.25 1.25 AFC pin of J band. During AM, it determines 21 23 DET OUT 24 AF IN 1.25 1.0 1.25 1.0 0 0 0 0 time constant of AGC. Detection output pin GND 24 11K Power amplifier input pin GND 25 RIPPLE 2.71 2.71 5.4 Vcc Ripple filter 5.4 FILTER 17K 25 73K 90K 26 Vcc 3.0 3.0 6.0 6.0 28 GND 0 0 0 0 *Note: Power supply pin Power GND The pin voltage of pin 6 during AM, it is the same pin voltage of pin22 (23) during J BAND and is the same pin voltage of pin 21 (22) during W BAND. UTC UNISONIC TECHNOLOGIES CO., LTD. 5 UTC CXA1191 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS (Ta=25°C,Vcc=6V) NO ITEM SYMBOL SW TEST CONDITIONS POINT CONDITIONS MIN TYP MAX UNIT 1 2 3 4 5 6 1 AM circuit current ID1 A B A A A A IA No signal, AM - 3.5 10.0 mA 2 FM circuit current ID2 A B A A B A IA No signal, FM - 7.0 14.0 mA 3 FM front end voltage gain GV1 A B A A B A VA VIN1=40dBµV,100MHZ 32 39 46 dB 4 FM detection output level VD1 A - VD VIN3=90dBµV,10.7 MHZ (1 39 77.5 155 Vrms - 24 32 dBµV - 0.3 2.0 % mA - A B A kHz,22.5kHz DEV) 5 FM IF knee level VD2 A - - A B A VD VIN3 level at a point 3 dB down from VIN3=90dBµV,10.7 MHZ (1 kHz,22.5kHz DEV) 6 FM detection output distortion THD1 A - - A B A VD factor VIN3=90dBµV,10.7 MHZ (1 kHz,75kHz DEV) 7 FM meter current IB1 A - - A B A IM VIN3=60dBµV,10.7 MHZ 1.8 3.5 7.0 8 AM front end voltage gain GV2 A A A A A A VB VIN3=60dBµV,1660 kHZ 15 22 29 dB 9 AM IF voltage gain GV3 A A - A A A VD VIN3 w hen 455kHz 14 20 27 dBµV 39 77.5 155 Vrms 1.3 3.0 7.0 mA - 0.6 2.0 % 27 31.5 36 dB - 0.3 2.5 % 8 15 22 dB (1kHz, 30% MOD) output is – 34dBm 10 AM detection output level VD3 A A - A A A VD VIN3=85dBµV,455kHZ (1kHz, 30% MOD) 11 AM meter current IB2 A A - A A A IM VIN3=85dBµV,455kHZ (1kHz, 30% MOD) 12 AM detection output distortion THD2 A A B B A A VD factor VIN2=60dBµV,1660kHZ (1kHz, 30% MOD),Vcc=7,8V 13 Audio voltage gain GV4 A - - - - B VE VIN3=60dBµV,10.7MHZ VIN4=-30dBµV,1kHZ 14 Audio distortion factor THD3 A - - - - B VE Distortion factor for output of 50mVV VIN3=60dBµV,10.7MHZ VIN4=-20dBµ m,1kHZ 15 Muting level VD4 A - - - - B VE Muting level for 50 mW output VIN4=-20dBm,1kHZ VIN3 OFF 0dBµV=1µV UTC UNISONIC TECHNOLOGIES CO., LTD. 6 UTC CXA1191 LINEAR INTEGRATED CIRCUIT APPLICATION CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 7