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Электронный компонент: CA2111

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8-13
May 1999
CA2111A
FM IF Amplifier-Limiter
and Quadrature Detector
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
Harris Corporation 1999
File Number
612.2
Features
Input Limiting Voltage At 10.7MHz . . . . . . . . . . . 400
V
Input Limiting Voltage At 4.5, 5.5MHz . . . . . . . . 250
V
Typical AM Rejection At 10.7MHz. . . . . . . . . . . . . 45dB
Provision for Output from 3-Stage IF Amplifier Section
Low Harmonic Distortion
Quadrature Detection Permits Simplified Single-Coil
Tuning
Extremely Low AFC Voltage Drift Over Full Operating
Temperature Range
Minimum Number of External Components Required
Applications
FM IF Sound
TV Sound IF
Description
The CA2111A provides a multistage wideband amplifier-
limiter, a quadrature detector, and an emitter-follower output
stage. This device is designed for use in FM receivers and in
the sound IF sections of TV receivers. In addition, an output
terminal is provided which allows the use of the amplifier-
limiter as a straight 60dB wideband amplifier.
The amplifier-limiter features the excellent limiting character-
istic of 3 cascaded differential amplifiers. The quadrature
detector requires only one coil in the associated outboard
circuit and therefore, tuning is a simple procedure.
A unique feature of the CA2111A is its exceptionally low
AFC voltage drift over the full operating-temperature range.
Pinout
CA2111A
(PDIP)
TOP VIEW
Block Diagram
Part Number Information
PART NUMBER
TEMP.
RANGE (
o
C)
PACKAGE
PKG.
NO.
CA2111AE
-40 to 85
14 Ld PDIP
E14.3
AUDIO OUT
REF BIAS
NC
IF IN
DC FB BYPASS
INPUT BYPASS
GROUND
DE-EMPHASIS
V+
QUADRATURE INPUT
QUADRATURE IN BUF
HIGH IF OUTPUT
LOW IF OUTPUT
NC
1
2
3
4
5
6
7
14
13
12
11
10
9
8
2
3
4
5
6
8
9
10
AMPLIFIER-
LIMITER
QUADRATURE
DETECTOR
13
V+
11
12
14
EMITTER
FOLLOWER
1
L
1
C
1
120pF
14
H
3pF
0.003
F
0.1
F
0.1
F
51
BIAS
+12V
7
[ /Title
(CA21
11A)
/Sub-
ject
(FM
IF
Ampli-
fier-
Limiter
and
Quadra
ture
Detec-
tor)
/Autho
r ()
/Key-
words
(Har-
ris
Semi-
con-
ductor,
FM IF
ampli-
fier,
quadrat
ure
detec-
tor,
lim-
iter,
TV
audio
IF,
high
AM
rejec-
tion,
OBSOLETE PR
ODUCT
NO RECOMMENDED REPLA
CEMENT
Call Central Applications 1-800-442-7747
or email: centapp@harris.com
8-14
Absolute Maximum Ratings
T
A
= 25
o
C
Thermal Information
Supply Voltage (V+ to V-) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16V
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . -40
o
C to 85
o
C
Supply Voltage Range (Typical) . . . . . . . . . . . . . . . . . . . . 8V to 12V
Thermal Resistance (Typical, Note 1)
JA
(
o
C/W)
PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
150
Maximum Junction Temperature (Plastic Package) . . . . . . . . 150
o
C
Maximum Storage Temperature Range . . . . . . . . . -65
o
C to 150
o
C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300
o
C
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1.
JA
is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
T
A
= 25
o
C Unless Otherwise Specified
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Terminal 1 DC Voltage
V
1
V+ = 12V
-
5.4
-
V
V+ = 8V
-
3.7
-
V
Terminals 4, 5, 6, 10 DC Voltage
V
4, 5, 6, 10
V+ = 8V
-
1.35
-
V
Terminals 2, 12 DC Voltage
V
2, 12
V+ = 8V
-
3.5
-
V
Supply Current, Pin 13
I
13
V+ = 8V
-
14
-
mA
V+ = 12V
-
16
-
mA
Amplifier Input Resistance
R
4
f
O
= 10.7MHz
-
7
-
k
Amplifier Input Capacitance
C
4
-
11
-
pF
Detector Input Resistance
R
12
-
70
-
k
Detector Input Capacitance
C
12
-
2.7
-
pF
Amplifier Output Resistance
R
10
-
60
-
Detector Output Resistance
R
1
-
200
-
De-emphasis Resistance
R
14
-
8.8
-
k
DYNAMIC CHARACTERISTICS f
O
= 10.7MHz,
f =
75kHz, V+ = 8V, FM Modulation Frequency = 400Hz, Source Resistance = 50
Input Limiting Threshold Voltage
V
I(LIM)
-
400
600
V
RMS
AM Rejection
AMR
V
I
= 10mV
RMS
, 100% FM, 30% AM
-
37
-
dB
Amplifier Voltage Gain
A
V
V
I
= 50
V
RMS
-
55
-
dB
Detector Recovered Audio Output
V
O(AF)
V
I
= 10mV
RMS
-
0.3
-
V
RMS
Total Harmonic Distortion
THD
V
I
= 10mV
RMS
-
1
-
%
DYNAMIC CHARACTERISTICS f
O
= 10.7MHz,
f =
75kHz, V+ = 12V, FM Modulation Frequency = 400Hz, Source Resistance = 50
Input Limiting Threshold Voltage
V
I(LIM)
-
400
600
V
RMS
AM Rejection
AMR
V
I
= 10mV
RMS
, 100% FM, 30% AM
-
45
-
dB
Amplifier Voltage Gain
A
V
V
I
= 50
V
RMS
-
55
-
dB
Detector Recovered Audio Output
V
O(AF)
V
I
= 10mV
RMS
-
0.48
-
V
RMS
Total Harmonic Distortion
THD
V
I
= 10mV
RMS
-
1
-
%
DYNAMIC CHARACTERISTICS f
O
= 4.5MHz,
f =
25kHz, V+ = 12V, FM Modulation Frequency = 400Hz, Source Resistance = 50
Input Limiting Threshold Voltage
V
I(LIM)
-
250
400
V
RMS
AM Rejection
AMR
V
I
= 10mV
RMS
, 100% FM, 30% AM
-
36
-
dB
CA2111A
8-15
Test Circuit
Amplifier Voltage Gain
A
V
V
I
= 50
V
RMS
-
60
-
dB
Detector Recovered Audio Output
V
O(AF)
V
I
= 10mV
RMS
-
0.72
-
V
RMS
Total Harmonic Distortion
THD
V
I
= 10mV
RMS
-
1.5
-
%
DYNAMIC CHARACTERISTICS f
O
= 5.5MHz,
f =
50kHz, V+ = 12V, FM Modulation Frequency = 400Hz, Source Resistance = 50
Input Limiting Threshold Voltage
V
I(LIM)
-
250
400
V
RMS
AM Rejection
AMR
V
I
= 10mV
RMS
, 100% FM, 30% AM
-
40
-
dB
Amplifier Voltage Gain
A
V
V
I
= 50
V
RMS
-
60
-
dB
Detector Recovered Audio Output
V
O(AF)
V
I
= 10mV
RMS
-
1.2
-
V
RMS
Total Harmonic Distortion
THD
V
I
= 10mV
RMS
-
3
-
%
Electrical Specifications
T
A
= 25
o
C Unless Otherwise Specified (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
1
10
9
14
8
7
3
5
4
6
13
0.1
F
0.1
F
51
0.1
F
2k
0.1
F
0.1
F
50
F
NOTE
C
1
C
2
R
1
L
1
V+
C
3
AM/FM SIGNAL
GENERATOR
AC VTVM
DISTORTION
ANALYZER
2
12
NOTE: Input to the quadrature coil can be from either terminal 9 or
terminal 10. Terminal 9 is normally used because it lessens the
possibility of overloads during tuning. The use of terminal 10
increases the limiting sensitivity significantly and has been used
successfully in these tests.
COMPONENT VALUES
DETECTOR
TRANSFER
CHARACTERISTICS
L
1
C
1
R
1
Q
C
2
C
3
UPPER
PEAK
LOWER
PEAK
MHz
H
pF
k
-
pF
F
MHz
MHz
4.5
14
120
20
30
3
0.003
4.58
4.42
5.5
8
100
20
30
3
0.003
5.63
5.37
10.7
2
120
3.9
20
4.7
0.01
10.9
10.5
CA2111A
8-16
Schematic Diagram
Typical Performance Curves
FIGURE 2. AM REJECTION vs INPUT VOLTAGE (AT 4.5MHz)
FIGURE 3. AM REJECTION vs INPUT VOLTAGE (AT 5.5MHz)
4
6
5
7
10
9
11
2
12
13
14
1
R
24
160K
Q
1
Q
2
Q
3
Q
4
Q
5
R
5
1K
Q
6
Q
7
Q
8
R
9
1K
Q
10
R
12
3K
Q
11
Q
12
Q
13
Q
9
R
1
500
R
6
2K
R
2
4K
R
3
R
4
500
2K
R
7
1K
R
8
500
Q
16
R
15
200
R
16
200
R
17
200
R
10
450
Q
14
Q
15
R
11
50
Q
24
Q
23
Q
22
Q
27
Q
25
R
21
5K
R
22
8K
Q
18
Q
19
Q
20
Q
21
R
19
8.8K
R
20
200
R
23
200
R
18
200
R
13
2.5K
R
14
2.5K
Q
26
Q
17
60
50
40
30
20
10
AM REJECTION (dB)
0.1
1
10
INPUT SIGNAL VOLTAGE (V
i
) (mV
RMS
)
T
A
= 25
o
C
V+ = 12V
f
O
= 4.5MHz
100% FM, 30% AM
REF. SIGNAL INPUT (TERM. 10)
REF. SIGNAL INPUT (TERM. 9)
60
50
40
30
20
10
AM REJECTION (dB)
0.1
1
10
INPUT VOLTAGE (V
i
) (mV
RMS
)
T
A
= 25
o
C
V+ = 12V
f
O
= 5.5MHz
100% FM, 30% AM
REF. SIGNAL INPUT (TERM. 10)
REF. SIGNAL INPUT (TERM. 9)
CA2111A
8-17
FIGURE 4. AM REJECTION vs INPUT VOLTAGE (AT 10.7MHz)
FIGURE 5. DETECTED AUDIO OUTPUT vs INPUT VOLTAGE
(4.5MHz)
FIGURE 6. DETECTED AUDIO OUTPUT vs INPUT VOLTAGE
(AT 5.5MHz)
FIGURE 7. DETECTED AUDIO OUTPUT VOLTAGE vs INPUT
VOLTAGE (AT 10.7MHz)
FIGURE 8. AFC VOLTAGE vs AMBIENT TEMPERATURE
FIGURE 9. SIGNAL-TO-NOISE RATIO vs INPUT VOLTAGE
Typical Performance Curves
(Continued)
50
40
30
20
10
0
AM REJECTION (dB)
1
10
100
INPUT VOLTAGE (V
i
) (mV
RMS
)
T
A
= 25
o
C
f
O
= 5.5MHz
100% FM, 30% AM
SUPPLY VOLTAGE
8V
12V
1.0
0.8
0.6
0.4
0.2
0
DETECTED A
UDIO OUTPUT
0.1
1
10
INPUT VOLTAGE (V
i
) (mV
RMS
)
0.9
0.7
0.5
0.3
0.1
V
O
L
T
A
GE (V
O
) (V
RMS
)
T
A
= 25
o
C, V+ = 12V
f =
25kHz
f
O
= 4.5MHz
REF. SIGNAL INPUT (TERM. 9)
1.3
1.1
0.9
0.7
0.5
0.3
DETECTED A
UDIO OUTPUT
0.1
1
10
INPUT VOLTAGE (V
i
) (mV
RMS
)
1.2
1
0.8
0.6
0.4
V
O
L
T
A
GE (V
O
) (V
RMS
)
T
A
= 25
o
C, V+ = 12V
f =
50kHz
f
O
= 5.5MHz
REF. SIGNAL INPUT (TERM. 9)
10
DETECTED A
UDIO OUTPUT
0.1
1
10
INPUT SIGNAL VOLTAGE (V
i
) (mV
RMS
)
100
V
O
L
T
A
GE (V
O
) (V
RMS
)
T
A
= 25
o
C
f =
75kHz
f
O
= 10.7MHz
100
0.01
SUPPLY VOLTAGE (V+) = 12V
8V
INPUT CARRIER = 1mV
3.8
3.7
3.6
-25
0
25
50
75
100
-50
TEMPERATURE (
o
C)
AFC V
O
L
T
A
GE, V
1
(V)
0
0.1
1
INPUT VOLTAGE (V
i
) (mV
RMS
)
60
SIGNAL-T
O-NOISE RA
TIO (dB)
f =
25kHz
10
0.01
MODULATION FREQUENCY = 1kHz
80
40
20
SUPPLY VOLTAGE (V+) = 12V
8V
T
A
= 25
o
C
CA2111A