UTCCXA1191 UTC | Alldatasheet
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UTC CXA1191 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 1 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.
FEATURES
*Small number of peripheral components *Low current consumption (Vcc=3V) FM: l D =5.3mA ( Typ.) AM: l D =3.4mA ( Typ.) *Built-in FM/AM select switch *Large current of AF amplifier 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 DIP-28 SOP-28 ABSOLUTE MAXIMUM RATINGS (Ta=25 °C) PARAMETER SYMBOL VALUE UNIT Supply voltage Vcc 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 CXA1191 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 2 RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL VALUE UNIT Supply voltage Vcc 2 ~ 7.5 (SOP-28) V Vcc 2 ~ 8.5 (DIP-28) V BLOCK DIAGRAM 28 27 26 25 24 23 20 1822 21 19 17 16 15 1 2 3 4 5 6 9 117 8 10 12 13 14 AF POWER AMP AM IF DET AGC TUNING METER AM FE FM DISCRIMINATOR FM FE FM IF MUTE FM DISCRI NF VOL AM OSC AFC FM OSC RUG OUT FM RF AM RF IN NC FW RF IN FM GND FM/AM IF OUT GND AF OUT Vcc RIPPLE FILTER AF IN DET OUT AFC AQC AFC AQC IF END METER NC FM IF IN AM IF IN FM/AM BAND SELECT
UTC CXA1191 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 3 PIN CONFIGURATIONS VOLTAGE(V) Vcc=3V Vcc=6V PIN SYMBOL FM AM FM AM EQUIVALENT CIRCUIT DESCRIPTION
1 MUTE 0 0 0 0
2 FM DISCRI 2.18 2.7 4.88 5.43 2 Phase-shift circuit, Connect ceramic discriminator. 3 NF 1.5 1.5 3.0 3.0 Negative feedback pin 27 AF OUT 1.5 1.5 3.0 3.0 X100 X100 GND Vcc Power amplifier output pin 4 VOL CONT 1.25 1.25 1.25 1.25 4 GND 20K 80K Connect variable resistor for electronic volume control. 5 AM OSC 1.25 1.25 1.25 1.25 5 3.6K AM local oscillation circuit 6 AFC 1.25 * 1.25 * AFC variable capacitor pin 8 REG OUT 1.25 1.25 1.25 1.25 6 1.25V REG Regulator pin 1.25V ( Typ.) 7 FM OSC 1.25 1.25 1.25 1.25 7 FM local oscillation circuit
UTC CXA1191 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 4 9 FM RF 1.25 1.25 1.25 1.25 Connect FM RF tuning coil. 12 FM RF IN 0.3 0 0.3 0 1.25V BK FM RF input pin 10 AM RF IN 1.25 1.25 1.25 1.25 10 Vcc AM RF input
11 NC 0 0 0 0
13 GND (FE GND) 0 0 0 0
14 FM/AM FE
0.36 0.2 0.36 0.2 AM FM 220 IF output pin of FM and AM, Connect IF filter 15 BAND SELECT 0.84 0 0.88 0 10K Vcc GND FM and AM bands selection switch pin. During GND it becomes AM and during open it becomes FM.
16 AM IF IN 0 0 0 0 16
17 FM IF IN 0.34 0 0.88 0 5.6K GND 24K24K360 Input pin of FM IF
18 NC 0 0 0 0
UTC CXA1191 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 5 19 METER 1.6 1.6 4.5 4.5 GND N 1.25V Meter drive circuit (For tuning indicator)
20 GND 0 0 0 0
During AM, it determines time constant of AGC. During AM, it determines time constant of AGC. 23 DET OUT 1.25 1.0 1.25 1.0 GND Detection output pin
24 AF IN 0 0 0 0
11K Power amplifier input pin
25 RIPPLE
2.71 2.71 5.4 5.4 Vcc 17K 73K 90K Ripple filter 26 Vcc 3.0 3.0 6.0 6.0 Power supply pin
28 GND 0 0 0 0 Power GND
*Note: 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 CXA1191 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 6 ELECTRICAL CHARACTERISTICS (Ta=25 °C ,Vcc=6V) NO ITEM SYMBOL SW CONDITIONS TEST 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 V IN1 =40dB µV,100MH Z 32 39 46 dB
4 FM detection output level VD1 A - - A B A VD V IN3 =90dB µV,10.7 MH Z (1 kHz,22.5kHz DEV) 39 77.5 155 Vrms
5 FM IF knee level VD2 A - - A B A VD V IN3 level at a point 3 dB
V IN3 =90dB µV,10.7 MH Z (1 kHz,22.5kHz DEV) - 24 32 dB µV
6 FM detection output distortion
THD1 A - - A B A VD V IN3 =90dB µV,10.7 MH Z (1 kHz,75kHz DEV) - 0.3 2.0 % 7 FM meter current IB1 A - - A B A IM V IN3 =60dB µV,10.7 MH Z 1.8 3.5 7.0 mA
8 AM front end voltage gain GV2 A A A A A A VB V IN3 =60dB µV,1660 kH Z 15 22 29 dB
9 AM IF voltage gain GV3 A A - A A A VD V IN3 w hen 455kHz
(1kHz, 30% MOD) output is – 34dBm 14 20 27 dB µV
10 AM detection output level VD3 A A - A A A VD V IN3 =85dB µV,455kH Z
(1kHz, 30% MOD) 39 77.5 155 Vrms
11 AM meter current IB2 A A - A A A IM V IN3 =85dB µV,455kH Z
(1kHz, 30% MOD) 1.3 3.0 7.0 mA
12 AM detection output distortion
THD2 A A B B A A VD V IN2 =60dB µV,1660kH Z (1kHz, 30% MOD),Vcc=7,8V - 0.6 2.0 % 13 Audio voltage gain GV4 A - - - - B VE V IN3 =60dB µV,10.7MH Z V IN4 =-30dB µV,1kH Z 27 31.5 36 dB
14 Audio distortion factor THD3 A - - - - B VE Distortion factor for
V IN3 =60dB µV,10.7MH Z V IN4 =-20dB µ m,1kH Z - 0.3 2.5 %
15 Muting level VD4 A - - - - B VE Muting level for 50 mW
V IN4 =-20dBm,1kH Z V IN3 OFF 8 15 22 dB 0dB µV=1 µV
UTC CXA1191 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 7 APPLICATION CIRCUIT