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PDF MC13028A Data sheet ( Hoja de datos )
| Número de pieza | MC13028A | |
| Descripción | C-QUAM AM STEREO ADVANCED WIDE VOLTAGE IF and DECODER | |
| Fabricantes | Motorola Semiconductors | |
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MC13028A
Advanced Wide Voltage
IF and C-QUAM® AM
Stereo Decoder
The MC13028A is a third generation C–QUAM stereo decoder targeted
for use in low voltage, low cost AM/FM E.T.R. radio applications. Advanced
features include a signal quality detector that analyzes signal strength,
signal to noise ratio, and stereo pilot tone before switching to the stereo
mode. A “blend function” much like FM stereo has been added to improve
the transition from mono to stereo. The audio output level is adjustable to
allow easy interface with a variety of AM/FM tuner chips. The external
components have been minimized to keep the total system cost low.
• Adjustable Audio Output Level
• Stereo Blend Function
• Stereo Threshold Adjustment
• Operation from 2.2 V to 12 V Supply
• Precision Pilot Tone Detector
• Forced Mono Function
• Single Pinout VCO
• IF Amplifier with IF AGC Circuit
• VCO Shutdown Mode at Weak Signal Condition
The purchase of the Motorola C–QUAM® AM Stereo Decoder does not carry with such pur-
chase any license by implication, estoppel or otherwise, under any patent rights of Motorola
or others covering any combination of this decoder with other elements including use in a
radio receiver. Upon application by an interested party, licenses are available from Motorola
on its patents applicable to AM Stereo radio receivers.
C–QUAM AM STEREO
ADVANCED WIDE VOLTAGE
IF and DECODER
for E.T.R. RADIOS
SEMICONDUCTOR
TECHNICAL DATA
16
1
P SUFFIX
PLASTIC PACKAGE
CASE 648
16
1
D SUFFIX
PLASTIC PACKAGE
CASE 751B
(SO–16)
Representative Block Diagram
16 15 14 13 12
11 10
9
VCO
AM Stereo
Decoder
IF
Amp
AGC
B8
Pilot Tone
Detector
Signal Quality
Detector
Reg
1 2 3 4 56 7
This device contains 679 active transistors.
MOTOROLA ANALOG IC DEVICE DATA
8
PIN CONNECTIONS
Stereo
Threshold Adjust
AGC Bypass
Filter
IF Feedback
Bypass
1
2
3
IF Signal Input 4
Gnd 5
Stereo
Indicator Drive
1.0 V
Reference
6
7
Blend 8
16
Right Channel
Output
15
Left Channel
Output
14 Loop Filter
13 VCO Output
12 VCC
11
Pilot Signal
Input
10
Pilot Q Detector
Output
9 Pilot I Detector
Output
ORDERING INFORMATION
Device
Operating
Temperature Range Package
MC13028AD
MC13028AP
TA = – 25° to +70°C
SO–16
DIP–16
© Motorola, Inc. 1996
Rev 2
1
1 page  
MC13028A
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPin Symbol
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ10 QPilot
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ11 PILOTfil
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ12 VCC
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ13 OSCin
PIN FUNCTION DESCRIPTION
Internal Equivalent Circuit
Description/External Circuit Requirements
VCC 10
5.0 k
Pilot Q Detector Output
This pin is connected to the Pilot Q detector and
requires a 0.47 µF capacitor to ground to filter the
error line voltage at the PLL pilot tone detector. If the
value of this capacitor is made too large, the
decoder may be prevented from coming back into
stereo after a signal drop out has been experienced
in the field. The force to mono function is also
accomplished at this pin by pulling the dc voltage
level at the pin below 1.0 V.
VCC VCC
30 k
11
Pilot Signal Input
A capacitor to ground forms a filter for the pilot input
signal. The recommended value of the capacitor is
0.22 µF. The dc level at Pin 11 is approximately
1.0 Vdc.
2.0 k
VCC
12
VCC
Vreg 13 Vreg
2.2 k
3.0 k
3.1 k
Supply Voltage (VCC)
The operating supply voltage range is from 1.8 Vdc
to 12 Vdc.
Oscillator Input
The oscillator pin requires a ceramic resonator and
parallel capacitor connected to ground. The
recommended source for the ceramic resonator is
Murata, part number CSA 3.60MGF108.
A 43 pF NPO capacitor is in parallel with the
resonator. The dc level at Pin 13 is approximately
1.1 Vdc.
6.3 pF
15 k
MOTOROLA ANALOG IC DEVICE DATA
5
5 Page 
MC13028A
Figure 8. Stereo Noise and Stereo Composite
Distortion when Mono Transmitted
10
Stereo Audio Level
7.0
0 6.0
Stereo Composite Distortion
–10 5.0
– 20
Noise
– 30 5.0 Hz to 3.0 kHz
400 Hz to 3.0 kHz
50 Hz to 3.0 kHz
– 40 100 Hz to 3.0 kHz
4.0
3.0
2.0
– 50 1.0
– 60
40
50 60 70
SIGNAL STRENGTH (dBµV)
0
80
Figure 9. R1 versus Stereo Threshold Point
1000
R1 to VCC
100
R1 to Gnd
10
46 48 50 52 54 56 58 60
STEREO THRESHOLD (dBµV)
Figure 10. Decoder Separation versus Filter
Capacitor (Pin 14) Leakage Current
50
45
40
35
30
25
20
– 600
– 400 – 200 0
200 400
LEAKAGE CURRENT (10–9)
600
Figure 11. Decoder Distortion versus Filter
Capacitor (Pin 14) Leakage Current
2.0
1.0
– 600
– 400 – 200 0
200 400
LEAKAGE CURRENT (10–9)
600
Figure 12. Low Frequency Corner
of PLL Response
Loop Filter 15 µF
4.0
Loop Filter 47 µF
0
Loop Filter 4.7 µF
– 4.0
– 8.0
–12
10
100
MODULATION FREQUENCY (Hz)
500
400
300
200
100
0
40
Figure 13. AGC Voltage versus
Input Signal Level
50 60 70 80
INPUT SIGNAL STRENGTH (dBµV)
90
MOTOROLA ANALOG IC DEVICE DATA
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet MC13028A.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MC13028A | C-QUAM AM STEREO ADVANCED WIDE VOLTAGE IF and DECODER | Motorola Semiconductors |
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