CXA1191 [UTC]
FM/AM Radio (for radio-cassette tape recorders and headphone tape recorders.); FM / AM收音机（无线电盒式录音机和耳机的录音机。 ）
| 型号： | CXA1191 |
| 厂家： | 
Unisonic Technologies |
| 描述： | FM/AM Radio (for radio-cassette tape recorders and headphone tape recorders.) |
| 文件： | 总7页 (文件大小：119K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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
SOP-28
recorders.
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
SYMBOL
VALUE
9
UNIT
V
Supply voltage
Vcc
Operating temperature
Storage temperature
Topr
-10 ~ +60
-50 ~ +125
700 (SOP-28)
1000 (DIP-28)
°C
Tstg
°C
Allowable power dissipation
PD
mW
1
UTC UNISONIC TECHNOLOGIES CO., LTD.
UTC CXA1191 LINEAR INTEGRATED CIRCUIT
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
VALUE
UNIT
Supply voltage
Vcc
2 ~ 7.5 (SOP-28)
2 ~ 8.5 (DIP-28)
V
V
Vcc
BLOCK DIAGRAM
FM/AM
BAND
SELECT
AF
OUT
RIPPLE
FILTER
AF
IN
DET
OUT
AFC
AQC
AFC
AQC
IF
END
FM
IF IN
AM
IF IN
GND
28
Vcc
26
METER
19
NC
18
27
25
24
23
22
21
20
17
16
15
AM IF DET AGC
AM FE
AF POWER AMP
TUNING METER
FM IF
FM DISCRIMINATOR
FM FE
1
2
3
4
5
AM
6
7
8
9
10
AM
11
12
13
14
FM
DISCRI
FM
OSC
RUG
OUT
FM
RF
FW
RF IN
FM
GND
FM/AM
IF OUT
MUTE
NF
VOL
AFC
NC
OSC
RF IN
2
UTC UNISONIC TECHNOLOGIES CO., LTD.
UTC CXA1191 LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATIONS
PIN
SYMBOL
VOLTAGE(V)
Vcc=3V Vcc=6V
EQUIVALENT CIRCUIT
DESCRIPTION
FM
AM
0
FM
AM
0
1
2
MUTE
0
0
FM DISCRI
2.18
2.7
4.88
5.43
2
Phase-shift circuit,
Connect ceramic
discriminator.
1K
2K
Vcc
3
NF
1.5
1.5
1.5
1.5
3.0
3.0
3.0
3.0
Negative feedback pin
X100
27
AF OUT
Power amplifier output pin
27
X100
GND
3
4
4
5
VOL CONT
AM OSC
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
Connect variable resistor
for electronic volume
control.
20K
80K
GND
AM local oscillation circuit
5
3.6K
6
8
7
AFC
1.25
1.25
1.25
*
1.25
1.25
1.25
*
AFC variable capacitor
pin
8
1.25V
6
REG OUT
FM OSC
1.25
1.25
1.25
1.25
Regulator pin 1.25V
(Typ.)
REG
FM local oscillation circuit
7
3
UTC UNISONIC TECHNOLOGIES CO., LTD.
UTC CXA1191 LINEAR INTEGRATED CIRCUIT
9
9
FM RF
1.25
1.25
1.25
1.25
Connect FM RF tuning
coil.
1.25V
BK
12
FM RF IN
0.3
0
0.3
0
FM RF input pin
12
1K
10
AM RF IN
1.25
1.25
1.25
1.25
AM RF input
10
Vcc
11
13
14
NC
0
0
0
0
0
0
0
0
GND (FE GND)
FM/AM FE
OUT
0.36
0.2
0.36
0.2
IF output pin of FM and
AM, Connect IF filter
AM
FM
220
14
Vcc
15
16
BAND SELECT 0.84
0
0
0.88
0
0
FM and AM bands
selection switch pin.
During GND it becomes
AM and during open it
becomes FM.
10K
15
GND
AM IF IN
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
0
0
0
0
4
UTC UNISONIC TECHNOLOGIES CO., LTD.
UTC CXA1191 LINEAR INTEGRATED CIRCUIT
19
METER
1.6
1.6
4.5
4.5
Meter drive circuit
(For tuning indicator)
19
1.25V
N
GND
20
21
GND
0
0
0
0
22
AFC/AGC
1.25
1.49
1.25
1.49
AFC pin of W band.
During AM, it determines
time constant of AGC.
AFC pin of J band.
22
AFC/AGC
1.25
1.25
1.25
1.25
During AM, it determines
time constant of AGC.
Detection output pin
21
23
24
DET OUT
AF IN
1.25
0
1.0
0
1.25
0
1.0
0
GND
11K
Power amplifier input pin
24
GND
Vcc
25
RIPPLE
FILTER
2.71
2.71
5.4
5.4
Ripple filter
17K
73K
25
90K
26
28
Vcc
3.0
0
3.0
0
6.0
0
6.0
0
Power supply pin
Power GND
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.
5
UTC UNISONIC TECHNOLOGIES CO., LTD.
UTC CXA1191 LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS (Ta=25°C,Vcc=6V)
NO
ITEM
SYMBOL
SW
TEST
CONDITIONS
MIN
TYP
MAX
UNIT
CONDITIONS
1 2 3 4 5 6
POINT
1
2
3
4
AM circuit current
ID1
ID2
A
A
A
A
B
B
B
-
A
A
A
-
A
A
A
A
A
B
B
B
A
A
A
A
IA
IA
No signal, AM
-
3.5
7.0
10.0
14.0
46
mA
mA
FM circuit current
No signal, FM
-
FM front end voltage gain
FM detection output level
GV1
VD1
VA
VD
VIN1=40dBmV,100MHZ
VIN3=90dBmV,10.7 MHZ (1
kHz,22.5kHz DEV)
VIN3 level at a point 3 dB
down from
32
39
39
dB
77.5
155
Vrms
5
FM IF knee level
VD2
A
-
-
A
B
A
VD
-
24
32
dBmV
VIN3=90dBmV,10.7 MHZ (1
kHz,22.5kHz DEV)
VIN3=90dBmV,10.7 MHZ (1
kHz,75kHz DEV)
6
FM detection output distortion
factor
THD1
A
-
-
A
B
A
VD
-
0.3
2.0
%
7
8
9
FM meter current
IB1
GV2
GV3
A
A
A
-
-
A
-
A
A
A
B
A
A
A
A
A
IM
VB
VD
VIN3=60dBmV,10.7 MHZ
VIN3=60dBmV,1660 kHZ
VIN3 w hen 455kHz
(1kHz, 30% MOD) output
is – 34dBm
1.8
15
14
3.5
22
20
7.0
29
27
mA
dB
AM front end voltage gain
AM IF voltage gain
A
A
dBmV
10 AM detection output level
11 AM meter current
VD3
IB2
A
A
A
A
A
A
-
-
A
A
B
A
A
A
A
A
A
VD
IM
VIN3=85dBmV,455kHZ
(1kHz, 30% MOD)
VIN3=85dBmV,455kHZ
(1kHz, 30% MOD)
VIN2=60dBmV,1660kHZ
(1kHz, 30%
39
1.3
-
77.5
3.0
155
7.0
2.0
Vrms
mA
%
12 AM detection output distortion
factor
THD2
B
VD
0.6
MOD),Vcc=7,8V
13 Audio voltage gain
GV4
A
A
-
-
-
-
-
-
-
-
B
B
VE
VE
VIN3=60dBmV,10.7MHZ
VIN4=-30dBmV,1kHZ
Distortion factor for
output of 50mVV
27
-
31.5
0.3
36
dB
%
14 Audio distortion factor
THD3
2.5
VIN3=60dBmV,10.7MHZ
VIN4=-20dBm m,1kHZ
Muting level for 50 mW
output
15 Muting level
VD4
A
-
-
-
-
B
VE
8
15
22
dB
VIN4=-20dBm,1kHZ
VIN3 OFF
0dBmV=1mV
6
UTC UNISONIC TECHNOLOGIES CO., LTD.
UTC CXA1191 LINEAR INTEGRATED CIRCUIT
APPLICATION CIRCUIT
7
UTC UNISONIC TECHNOLOGIES CO., LTD.
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