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UTC CXA1191
FM/AM Radio
DESCRIPTION
LINEAR INTEGRATED CIRCUIT
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=25C)
PARAMETER
Supply voltage Operating temperature Storage temperature Allowable power dissipation
SYMBOL
Vcc Topr Tstg PD
VALUE
9 -10 ~ +60 -50 ~ +125 700 (SOP-28) 1000 (DIP-28)
UNIT
V C C mW
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
UTC CXA1191
PARAMETER
Supply voltage
LINEAR INTEGRATED CIRCUIT
SYMBOL
Vcc Vcc
RECOMMENDED OPERATING CONDITIONS
VALUE
2 ~ 7.5 (SOP-28) 2 ~ 8.5 (DIP-28)
UNIT
V V
BLOCK DIAGRAM
GND 28 AF OUT 27 Vcc 26 RIPPLE FILTER 25 AF IN 24 DET OUT 23 AFC AQC 22 AFC AQC 21 IF END 20 METER 19 NC 18 FM IF IN 17 AM IF IN 16 FM/AM BAND SELECT 15
AM IF DET AGC AF POWER AMP TUNING METER
AM FE
FM IF
FM DISCRIMINATOR
FM FE
1 MUTE
2 FM DISCRI
3 NF
4 VOL
5 AM OSC
6 AFC
7 FM OSC
8 RUG OUT
9 FM RF
10 AM RF IN
11 NC
12 FW RF IN
13 FM GND
14 FM/AM IF OUT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
UTC CXA1191
PIN CONFIGURATIONS
PIN SYMBOL FM
1 2 MUTE FM DISCRI 0 2.18
LINEAR INTEGRATED CIRCUIT
VOLTAGE(V) Vcc=3V AM
0 2.7
EQUIVALENT CIRCUIT AM
0 5.43
1K 2K 2
DESCRIPTION
Vcc=6V FM
0 4.88
Phase-shift circuit, Connect ceramic discriminator.
3 27
NF AF OUT
1.5 1.5
1.5 1.5
3.0 3.0
3.0 3.0
Vcc X100 27 X100 GND 3
Negative feedback pin Power amplifier output pin
4
VOL CONT
1.25
1.25
1.25
1.25
4
Connect variable resistor
20K
for electronic volume control.
80K GND
5
AM OSC
1.25
1.25
1.25
1.25
5
AM local oscillation circuit
3.6K
6 8 7
AFC REG OUT FM OSC
1.25 1.25 1.25
* 1.25 1.25
1.25 1.25 1.25
* 1.25 1.25
8 6
7
AFC variable capacitor
1.25V Regulator pin 1.25V REG
(Typ.) FM local oscillation circuit
pin
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
UTC CXA1191
9 12 FM RF FM RF IN 1.25 0.3
LINEAR INTEGRATED CIRCUIT
1.25 0 1.25 0.3 1.25 0
9 1.25V 12 1K BK
Connect FM RF tuning coil. FM RF input pin
10
AM RF IN
1.25
1.25
1.25
1.25
10 Vcc
AM RF input
11 13 14
NC GND (FE GND) FM/AM FE OUT
0 0 0.36
0 0 0.2
0 0 0.36
0 0 0.2 IF output pin of FM and AM, Connect IF filter
AM
FM
220 14
15 BAND SELECT 0.84 0 0.88 0
Vcc
FM and AM bands selection switch pin. During GND it becomes
10K 15
AM and during open it becomes FM.
GND
16
AM IF IN
0
0
0
0
16 2K
Input pin of AM IF
17
FM IF IN
0.34
0
0.88
0
Input pin of FM IF
10 17 360 24K 5.6K GND
18 NC 0 0 0 0
24K
UTC
UNISONIC TECHNOLOGIES CO., LTD.
4
UTC CXA1191
19 METER 1.6
LINEAR INTEGRATED CIRCUIT
1.6 4.5 4.5 Meter drive circuit
19 1.25V
(For tuning indicator)
N GND
20 21 GND AFC/AGC 0 1.25 0 1.49 0 1.25 0 1.49
22
AFC pin of W band. During AM, it determines time constant of AGC.
22
AFC/AGC
1.25
1.25
1.25
1.25
21
AFC pin of J band. During AM, it determines time constant of AGC. Detection output pin
GND
23
DET OUT
1.25
1.0
1.25
1.0
24
AF IN
0
0
0
0
24
11K
Power amplifier input pin
GND
25 RIPPLE FILTER 2.71 2.71 5.4 5.4
Vcc Ripple filter 17K 25 73K 90K
26 28 *Note:
Vcc GND
3.0 0
3.0 0
6.0 0
6.0 0
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
NO ITEM
LINEAR INTEGRATED CIRCUIT
SYMBOL SW CONDITIONS TEST POINT CONDITIONS MIN TYP MAX UNIT
ELECTRICAL CHARACTERISTICS (Ta=25C,Vcc=6V)
123456
1 2 3 4 AM circuit current FM circuit current FM front end voltage gain FM detection output level ID1 ID2 GV1 VD1 ABAAAA ABAABA ABAABA A-ABA IA IA VA VD No signal, AM No signal, FM VIN1=40dBV,100MHZ VIN3=90dBV,10.7 MHZ (1 kHz,22.5kHz DEV) 5 FM IF knee level VD2 A-ABA VD VIN3 level at a point 3 dB down from VIN3=90dBV,10.7 MHZ (1 kHz,22.5kHz DEV) 6 FM detection output distortion factor 7 8 9 FM meter current AM front end voltage gain AM IF voltage gain IB1 GV2 GV3 A-ABA IM VB VD THD1 A-ABA VD VIN3=90dBV,10.7 MHZ (1 kHz,75kHz DEV) VIN3=60dBV,10.7 MHZ VIN3=60dBV,1660 kHZ VIN3 w hen 455kHz (1kHz, 30% MOD) output is - 34dBm 10 AM detection output level VD3 AA -AAA VD VIN3=85dBV,455kHZ (1kHz, 30% MOD) 11 AM meter current IB2 AA -AAA IM VIN3=85dBV,455kHZ (1kHz, 30% MOD) 12 AM detection output distortion factor THD2 AABBAA VD VIN2=60dBV,1660kHZ (1kHz, 30% MOD),Vcc=7,8V 13 Audio voltage gain GV4 A-B VE VIN3=60dBV,10.7MHZ VIN4=-30dBV,1kHZ 14 Audio distortion factor THD3 A-B VE Distortion factor for output of 50mVV VIN3=60dBV,10.7MHZ VIN4=-20dB m,1kHZ 15 Muting level VD4 A-B VE Muting level for 50 mW output VIN4=-20dBm,1kHZ VIN3 OFF 8 15 22 dB 0.3 2.5 % 27 31.5 36 dB 0.6 2.0 % 1.3 3.0 7.0 mA 39 77.5 155 Vrms 1.8 15 14 3.5 22 20 7.0 29 27 mA dB dBV 0.3 2.0 % 24 32 dBV 32 39 3.5 7.0 39 77.5 10.0 14.0 46 155 mA mA dB Vrms
AAAAAA AA -AAA
0dBV=1V
UTC
UNISONIC TECHNOLOGIES CO., LTD.
6
UTC CXA1191
APPLICATION CIRCUIT
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
7

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