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Advance Information Advanced Medium Voltage AM Stereo Decoder
The MC13022A is designed for home and automotive AM stereo radio applications. The circuits and functions included in the design allow implementation of a full-featured C-QUAM(R) AM stereo radio with relatively few, inexpensive external parts. It is available in either 28-lead DIP or EIAJ compatible wide-bodied 28-lead SOIC. Functionally, the MC13022A and MC13022 are very similar. The MC13022A has 10 dB more audio output and a CMOS compatible logic level output (Pin 15) for stop sense. The stop sense/AGC function has been internally connected to the output notch filter control. * Operation from 6.0 V to 10 V Supply with Current Drain of 20 mA Typ
MC13022A
C-QUAM ADVANCED MEDIUM VOLTAGE AM STEREO DECODER
SEMICONDUCTOR TECHNICAL DATA
* * * * * * * * *
IF Amplifier with Two Speed AGC Post Detection Filters that Allow Automatic Adjustable Audio Bandwidth Control and Notch Filtering (9.0 or 10 kHz) Signal Quality Controlled Stereo Blend and Noise Reduction Noise and Co-Channel Discriminating Stop-On-Station Signal Strength Indicator Output for Stop Sense and/or Meter Drive Signal Strength Controlled IF and Audio Bandwidth Noise Immune Pilot Detector Needs no Precision Filter Components MC13025 Complementary Electronically Tuned Radio Front End CMOS Compatible Driver for Stop Sense
28 1
28 1
P SUFFIX PLASTIC PACKAGE CASE 710
DW SUFFIX PLASTIC PACKAGE CASE 751F (SO-28L)
C-QUAM is a registered trademark of Motorola, Inc.
The purchase of the Motorola C-QUAM(R) AM Stereo Decoder does not carry with such purchase 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.
PIN CONNECTIONS
Env Det Decoder Input Ref AGC IF Input SS Filtered Left Out 1 2 3 4 5 6 7 8 9 28 I Det 27 L-R Det 26 Q Out 25 VCC 24 Loop Filter 23 Blend 22 GND 21 Stereo Lamp 20 Osc Feedback 19 Osc In 18 Pilot Det In 17 I Pilot 16 Q Pilot 15 CMOS SS Out (Top View)
Simplified Application
IF Decoder I Q L R Left Audio Post Det Filter Right Audio Blend, COS, Fast-Lock Conrol Pilot Detector Yes/No Pilot Lamp
450 kHz Low-Level IF
IF Amp AGC
Left Notch In Feedback
Unfiltered Lout 10 Unfiltered Rout 11 Feedback 12 Right Notch In 13 Filtered Right Out 14
Level Fast AGC Control
Signal Quality Detector
Signal Strength Control of Audio Filters CMOS (Logic)
ORDERING INFORMATION
Device MC13022AP MC13022ADW TA = - 40 to +85C Operating Temperature Range Package Plastic Power SO-28L
This document contains information on a new product. Specifications and information herein are subject to change without notice. DEVICE DATA MOTOROLA ANALOG IC
(c) Motorola, Inc. 1996
Rev 1
1
MC13022A
MAXIMUM RATINGS
Rating Power Supply Input Voltage Stereo Indicator Lamp Current (Pin 21) Operating Ambient Temperature Storage Temperature Range Operating Junction Temperature Power Dissipation Derate above 25C
NOTE: ESD data available upon request.
Symbol VCC - TA Tstg TJ(max) PD
Value 12 30 -40 to +85 -65 to +150 150 1.25 10
Unit Vdc mAdc C C C W mW/C
ELECTRICAL CHARACTERISTICS (VCC = 8.0 V, TA = 25C, Test Circuit of Figure NO TAG, unless otherwise noted.)
Characteristic Power Supply Operating Range Supply Line Current Drain (Pin 25) Minimum Input Signal Level, Unmodulated for Full Operation (Pin 5) Audio Output Level, 50% Modulation, L only or R only (Pins 10, 11) Stereo Audio Output Level, 50% Modulation (Pins 10, 11) Monaural Output THD, 50% Modulation Monaural Stereo Channel Separation, L only or R only, 50% Modulation Stereo Pilot Acquisition Time Following Blend Reset to 0.3 Vdc Audio Output Impedance at 1.0 kHz (Pins 7, 14) Stereo Indicator Lamp Pin Saturation Voltage at 3.0 mA Load Current (Vsat Pin 21) Stereo Indicator Lamp Pin Leakage Current (Pin 21) Oscillator Capture Range Min 6.0 10 - 290 140 Typ 8.0 20 5.0 400 200 Max 10 25 - 530 265 Unit Vdc mAdc mVrms mVrms mVrms % - - 22 - - - - - 0.3 0.5 35 - 300 - - 3.0 0.8 1.6 - 600 - 200 1.0 - dB ms mVdc Adc kHz
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MOTOROLA ANALOG IC DEVICE DATA
MC13022A
Figure 1. Test Circuit
From Tuning System VCC 2.2 k 3.0 k 3.9 k 0.001 0.001 0.001 47 F IDet 28 L-R Det 27 Q Out 26 VCC 25 Loop Filt 24 + Blend 23 20 F + Gnd 22 Signal Quality Detector Decoder VCO Stereo Lamp 21 LED Osc Fbk 20 Osc In 19 Pilot Det Input 18 T1 .001 51 10 F Pilot I 17 + 0.47 Pilot Q 16 Stop Sense 15 0.33 + 0.68 47 k To CMOS Logic Logic VCC (5.0 V)
Pilot Detector
Gain-Controlled L-R Envelope L+R Signal Strength Output 1.0 k Q1 Buffer Filter Amp Filter Amp Buffer 8 9 10 11 12 13 740 43 k 43 k 21.5 k 370 L Output 0.01 Stop Sense, SS Meter T1 - Ceramic Resonator muRata T1 - CSA 3.60 MGF103 L2 - Miller 9230-92 R Output 370 370 14 Matrix 1.7 Vref
Q2
IF Out 3.0 V 1 Env Det 0.001 2 Decoder Input 3 Ref 13 k L2 1.0 mH 120
IF/AGC
4 AGC + 10 F
5
6
7
0.01 10 k
43 k 21.5 k
740 43 k
IF Input 100 k
Filtered Left Output
370
Filtered Right Output
+ 10 F
NOTES: 1. Q1 is switched on when the Blend Pin 23 is externally held low and the signal is weak or has 110% negative modulation. In this condition Q1 pulls Pin 6 low (0.25 to 1.3 V). At all other times, Pin 6 follows the curve in Figure NO TAG. 2. Q2 (Pin 15) is switched on when Pin 6 voltage is below 1.7 V. Q2 could then be used as a logic output to the tuning system, telling the tuning system to continue searching for a good signal. 3. User is cautioned not to require more than 1.0 mA from Pin 6.
MOTOROLA ANALOG IC DEVICE DATA
3
MC13022A
EXPLANATION OF FEATURES
Blend and Noise Reduction Although AM stereo does not have the extreme difference in S/N between mono and stereo that FM does (typically less than 3.0 dB versus greater than 20 dB for FM), sudden switching between mono and stereo is quite apparent. Some forms of interference such as co-channel have a large L-R component that makes them more annoying than would ordinarily be expected for the measured level. The MC13022A measures the interference level and reduces L-R as interference increases, blending smoothly to monaural. The pilot indicator remains on as long as a pilot signal is detected, even when interference is severe, to minimize annoying pilot light flickering. Signal Strength A dc voltage proportional to the log of signal strength is provided at Pin 6. This can be used for signal strength indication, and it directly controls the post detection filter. Normal operation is above 2.2 V as shown is Figure NO TAG. Stop Sense The signal strength information is multiplexed with the stop sense signal. The stop sense is activated when scanning by externally pulling the blend, Pin 23, below 0.3 V. This would typically be done from the mute line in a frequency synthesizer. If at any time Pin 23 is low and there is either no signal in the IF or a noisy signal of a predetermined interference level, Pins 6 and 15 will go low. This low can be used to tell the frequency synthesizer to immediately scan to the next channel. The interference detection prevents stopping on many unlistenable stations, a feature particularly useful at night when many frequencies may have strong signals from multiple co-channel stations. Pin 6 drives a comparator which has a 1.7 V reference. Therefore the comparator output, Pin 15, is low if Pin 6 is <1.7 V and high if Pin 6 is >1.7 V. IF Bandwidth Control IF AGC attenuates the signal by shunting the signal at the IF input. This widens the IF bandwidth by decreasing the loaded Q of the input coupling coil as signal strength increases. Post Detection Filtering With weak, noisy signals, high frequency rolloff greatly improves the sound. Conventional tone controls do not attenuate the highs sufficiently to control noise without also significantly affecting the mid-range. Also, notch filters are necessary with any wide-band AM radio to eliminate the 10 kHz whistle from adjacent stations. By using a twin-T filter with variable feedback to the normally grounded center leg, a variable Q notch filter is formed that provides both the 10 kHz notch and variable high frequency rolloff functions. Typical range of response is shown in Figure NO TAG. Response is controlled by Pin 6 for automatic audio bandwidth control as a function of signal strength.
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MOTOROLA ANALOG IC DEVICE DATA
MC13022A
Figure 2. High Performance Home Type AM Stereo Receiver
From Mute Line VCC .001 3.9 k T1 51 To Tuning System 18 Pilot Det In 17 I Pilot 16 Q Pilot 15 CMOS SS Out Logic VCC (5.0 V) TOKO Part No. MF292BC-1349Z
28 I Det
27 L-R Det
26 Q Out
25 VCC
24 Loop Filter
23 Blend
22 GND
21 20 Stereo Osc Lamp Feedbk
19 Osc In
MC13022A
Env Det 1 Decoder Input 2 Ref 3 AGC 4 IF Input 5 SS 6 Out 7 Left Notch FBK In 8 9 Unfiltered Lout Rout 10 11 FBK 12 Right Notch Out In 13 14
T2 450 kHz See MC13025 Data Sheet for Alternate Approach IF
To Signal Strength Meter TOKO Part No. THB-122
Tuning Line From Synthesizer Loop Stick T1 - Ceramic Resonator muRata T1 - CSA 3.60 MGF103 T2 - Broad Resonance @ 450 kHz T2 - Effective RP of 8.0 k to 12 k T2 - (TOKO 7NRES-T13704)
Mixer
Oscillator
Figure 3. Overall Selectivity of a Typical Receiver versus Filter Control Voltage
STOP SENSE, SS METER, PIN 6 (Vdc) 0 OVERALL RESPONSE (dB) -10 -20 -30 -40 -50 -60 -70 -80 1.5 VPin 6 = 3.5 Vdc 2.5 Vdc 1.5 Vdc - - Response at - - Pins 10 and 11 Due - - to IF Selectivity - - Total Response at - - Output Pins 7 and 14 2.0 3.0 4.0 5.0 6.0 8.0 10 15 AUDIO FREQUENCY (kHz) 20 30
Figure 4. Strength Output versus Input Signal
Signal Input 5 2 3 6 100 k Zo = 13 k SS Meter 0.01
5.0
10 k 0.01
4.0
3.0
2.0 1.0 3.0 10 30 100 300 SIGNAL INPUT, 10 k TO PIN 5 (mVrms) 1.0 k
MOTOROLA ANALOG IC DEVICE DATA
5
MC13022A
OUTLINE DIMENSIONS
P SUFFIX PLASTIC PACKAGE CASE 710-02 ISSUE B
NOTES: 1. POSITIONAL TOLERANCE OF LEADS (D), SHALL BE WITHIN 0.25 (0.010) AT MAXIMUM MATERIAL CONDITION, IN RELATION TO SEATING PLANE AND EACH OTHER. 2. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 3. DIMENSION B DOES NOT INCLUDE MOLD FLASH. DIM A B C D F G H J K L M N MILLIMETERS MIN MAX 36.45 37.21 13.72 14.22 3.94 5.08 0.36 0.56 1.02 1.52 2.54 BSC 1.65 2.16 0.20 0.38 2.92 3.43 15.24 BSC 0_ 15_ 0.51 1.02 INCHES MIN MAX 1.435 1.465 0.540 0.560 0.155 0.200 0.014 0.022 0.040 0.060 0.100 BSC 0.065 0.085 0.008 0.015 0.115 0.135 0.600 BSC 0_ 15_ 0.020 0.040
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15
B
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A N
C
L
H
G
F D
K
SEATING PLANE
M
J
DW SUFFIX PLASTIC PACKAGE CASE 751F-04 (SO-28L) ISSUE E
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN EXCESS OF D DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A B C D F G J K M P R MILLIMETERS MIN MAX 17.80 18.05 7.40 7.60 2.35 2.65 0.35 0.49 0.41 0.90 1.27 BSC 0.23 0.32 0.13 0.29 0_ 8_ 10.01 10.55 0.25 0.75 INCHES MIN MAX 0.701 0.711 0.292 0.299 0.093 0.104 0.014 0.019 0.016 0.035 0.050 BSC 0.009 0.013 0.005 0.011 0_ 8_ 0.395 0.415 0.010 0.029
-A-
28 15 14X
-B-
1 14
P 0.010 (0.25)
M
B
M
28X
D
M
0.010 (0.25)
TA
S
B
S
M R C
X 45 _
26X
G K
-T-
SEATING PLANE
F J
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MOTOROLA ANALOG IC DEVICE DATA
MC13022A
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
MOTOROLA ANALOG IC DEVICE DATA
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MC13022A
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JAPAN: Nippon Motorola Ltd.; Tatsumi-SPD-JLDC, 6F Seibu-Butsuryu-Center, 3-14-2 Tatsumi Koto-Ku, Tokyo 135, Japan. 03-81-3521-8315 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852-26629298
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*MC13022A/D*
MOTOROLA ANALOG IC DEVICE DATA
MC13022A/D

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