LINEAR INTEGRATED CIRCUIT

Transcription

1 / Radio DESCRIPTION The UTC CXA1191 is a one-chip / radio IC designed for radio-cassette tape recorders and headphone tape recorders. SOP-28 FEATURES *Small number of peripheral components *Low current consumption (=3V) : l D =5.3mA (Typ.) : l D =3.4mA (Typ.) *Built-in / select switch *Large current of AF amplifier DIP-28 FUNCTIONS section RF amplifier, Mixer and OSC (incorporating AFC variable capacitor) IF amplifier Quadrature detection Tuning LED driver section RF amplifier, Mixer and OSC (with RF AGC) IF amplifier (with IF AGC) Detector Tuning LED driver AF section Electronic volume control muting Structure Bipolar silicon monolithic IC ABSOLUTE MAXIMUM RATINGS(Ta=25 C) PARETER SYMBOL VALUE UNIT Supply voltage 9 V Operating temperature Topr -10 ~ +60 C Storage temperature Tstg -50 ~ +125 C Allowable power dissipation P D 700 (SOP-28) 1000 (DIP-28) mw UTC UNISONIC TECHNOLOGIES CO., LTD. 1

2 RECOMMENDED OPERATING CONDITIONS PARETER SYMBOL VALUE UNIT Supply voltage 2 ~ 7.5 (SOP-28) V 2 ~ 8.5 (DIP-28) V BLOCK DIAGR AF RIPPLE FILTER AF IN DET AFC AQC AFC AQC IF END METER NC IF IN IF IN / BAND SELECT AF POWER P IF DET AGC TUNING METER FE IF DISCRIMINATOR FE MUTE DISCRI NF VOL OSC AFC OSC RUG RF RF IN NC FW RF IN / IF UTC UNISONIC TECHNOLOGIES CO., LTD. 2

3 PIN CONFIGURATIONS PIN SYMBOL VOLTAGE(V) EQUIVALENT CIRCUIT DESCRIPTION =3V =6V 1 MUTE DISCRI Phase-shift circuit, Connect ceramic 1K discriminator. 2K 3 NF Negative feedback pin 27 AF X100 Power amplifier output pin 27 X VOL CONT K Connect variable resistor for electronic volume control. 80K 5 OSC local oscillation circuit 3.6K 6 AFC 1.25 * 1.25 * 8 AFC variable capacitor pin 8 REG V Regulator pin 1.25V REG (Typ.) 7 OSC local oscillation circuit UTC UNISONIC TECHNOLOGIES CO., LTD. 3

4 9 RF Connect RF tuning 1.25V coil. 12 RF IN BK 12 RF input pin 1K 10 RF IN RF input 11 NC (FE ) / FE IF output pin of and, Connect IF filter BAND SELECT K and bands selection switch pin. During it becomes and during open it becomes. 16 IF IN Input pin of IF 2K 17 IF IN Input pin of IF K 24K 5.6K 18 NC UTC UNISONIC TECHNOLOGIES CO., LTD. 4

5 19 METER Meter drive circuit 19 (For tuning indicator) 1.25V N AFC/AGC AFC pin of W band. During, it determines time constant of AGC. 22 AFC/AGC AFC pin of J band. During, it determines 21 time constant of AGC. 23 DET Detection output pin 24 AF IN K Power amplifier input pin 25 RIPPLE FILTER K 73K Ripple filter 90K Power supply pin Power *Note: The pin voltage of pin 6 during, 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

6 ELECTRICAL CHARACTERISTICS (Ta=25 C,=6V) NO ITEM SYMBOL SW TEST CONDITIONS MIN TYP MAX UNIT CONDITIONS POINT circuit current ID1 A B A A A A IA No signal, ma 2 circuit current ID2 A B A A B A IA No signal, ma 3 front end voltage gain GV1 A B A A B A VA V IN1=40dBµV,100MH Z db 4 detection output level VD1 A - - A B A VD V IN3=90dBµV,10.7 MH Z (1 khz,22.5khz DEV) 5 IF knee level VD2 A - - A B A VD V IN3 level at a point 3 db down from V IN3=90dBµV,10.7 MH Z (1 khz,22.5khz DEV) Vrms dbµv 6 detection output distortion factor THD1 A - - A B A VD V IN3=90dBµV,10.7 MH Z (1 khz,75khz DEV) % 7 meter current IB1 A - - A B A IM V IN3=60dBµV,10.7 MH Z ma 8 front end voltage gain GV2 A A A A A A VB V IN3=60dBµV,1660 kh Z db 9 IF voltage gain GV3 A A - A A A VD V IN3 w hen 455kHz (1kHz, 30% MOD) output is 34dBm 10 detection output level VD3 A A - A A A VD V IN3=85dBµV,455kH Z (1kHz, 30% MOD) 11 meter current IB2 A A - A A A IM V IN3=85dBµV,455kH Z (1kHz, 30% MOD) dbµv Vrms ma 12 detection output distortion factor THD2 A A B B A A VD V IN2=60dBµV,1660kH Z (1kHz, 30% MOD),=7,8V % 13 Audio voltage gain GV4 A B VE V IN3=60dBµV,10.7MH Z V IN4=-30dBµV,1kH Z db 14 Audio distortion factor THD3 A B VE Distortion factor for output of 50mVV % V IN3=60dBµV,10.7MH Z V IN4=-20dBµ m,1kh Z 15 Muting level VD4 A B VE Muting level for 50 mw output db V IN4=-20dBm,1kH Z V IN3 OFF 0dBµV=1µV UTC UNISONIC TECHNOLOGIES CO., LTD. 6

7 APPLICATION CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 7