MC3362~1
MC3362 MC3362
User Manual: MC3362~1
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SEMICONDUCTOR
TECHNICAL DATA
LOW–POWER
DUAL CONVERSION
FM RECEIVER
Order this document by MC3362/D
P SUFFIX
PLASTIC PACKAGE
CASE 724
DW SUFFIX
PLASTIC PACKAGE
CASE 751E
(SO-24L)
X
X
X
Detector Output
Comparator Input
Comparator Output
VEE
2nd Mixer Input
2nd Mixer Input
2nd Mixer Output
1st Mixer Input
Quadrature Coil
Limiter
Decoupling
Limiter
Decoupling
2nd LO Emitter
1st Mixer Output
1st LO Output
1st LO Tank
1st LO Tank
Varicap Control
1st Mixer Input
2nd LO Output
2nd LO Base
VCC
Limiter Input
24
23
22
21
20
19
18
17
9 16
15
14
13
10
11
12
Meter Drive
8
7
6
5
1
2
3
4
Carrier Detect
Figure 2. Pin Connections and
Representative Block Diagram
Device Operating
Temperature Range Package
ORDERING INFORMATION
MC3362DW
MC3362P TA = – 40 to +85°CSO–24L
Plastic DIP
1
MOTOROLA ANALOG IC DEVICE DATA
. . . includes dual FM conversion with oscillators, mixers, quadrature
discriminator, and meter drive/carrier detect circuitry. The MC3362 also has
buffered first and second local oscillator outputs and a comparator circuit for
FSK detection.
•Complete Dual Conversion Circuitry
•Low Voltage: VCC = 2.0 to 6.0 Vdc
•Low Drain Current (3.6 mA (Typical) @ VCC = 3.0 Vdc)
•Excellent Sensitivity: Input Voltage 0.6 µVrms (Typical)
for 12 dB SINAD
•Externally Adjustable Carrier Detect Function
•Low Number of External Parts Required
•Manufactured Using Motorola s MOSAIC Process Technology
•MC13135 is Preferred for New Designs
0.01
Recovered
Audio
8.2 k
0.001
VCC
Data
0.1
10 k
To PLL or Prescaler
1.0+
0.01
39 K
0.1
0.1
From PLL Phase
Detector
200 k
MC3362
RF Input
to 200 MHz
VCC 120 pF
10.245 MHz 50 pF
0.01
Input
Match
Ceramic Filter
455 kHz
0.1
Ceramic Filter
10.7 MHz
0.41
µ
H
To Carrier
Lp = 680
µ
H
Cp = 180 pF
10 k 1312
14
11
1510
169
178
187
22
1
421
24
520
23
3
619
2
Detect
Indicator
Figure 1. Simplified Application in a PLL Frequency
Synthesized Receiver
Figure 2.
Motorola, Inc. 1995
MC3362
2MOTOROLA ANALOG IC DEVICE DATA
MAXIMUM RATING (TA = 25°C, unless otherwise noted)
Rating Pin Symbol Value Unit
Power Supply Voltage (See Figure 2) 6 VCC(max) 7.0 Vdc
Operating Supply Voltage Range (Recommended) 6 VCC 2.0 to 6.0 Vdc
Input Voltage (VCC 5.0 Vdc) 1, 24 V1–24 1.0 Vrms
Junction Temperature – TJ150 °C
Operating Ambient Temperature Range – TA– 40 to + 85 °C
Storage Temperature Range – Tstg – 65 to + 150 °C
ELECTRICAL CHARACTERISTICS (VCC = 5.0 Vdc, fo = 49.7 MHz, Deviation = 3.0 kHz, TA = 25°C, Test Circuit of Figure 3,
unless otherwise noted)
Characteristic Pin Min Typ Max Units
Drain Current (Carrier Detect Low – See Figure 5) 6 – 4.5 7.0 mA
Input for –3.0 dB Limiting – 0.7 2.0 µVrms
Input for 12 dB SINAD (See Figure 9) – 0.6 – µVrms
Series Equivalent Input Impedence – 450–j350 – Ω
Recovered Audio (RF signal level = 10 mV) 13 – 350 – mVrms
Noise Output (RF signal level = 0 mV) 13 – 250 – mVrms
Carrier Detect Threshold (below VCC) 10 – 0.64 – Vdc
Meter Drive Slope 10 – 100 – nA/dB
Input for 20 dB (S + N)/N (See Figure 7) – 0.7 – µVrms
First Mixer 3rd Order Intercept (Input) – –22 – dBm
First Mixer Input Resistance (Rp) – 690 – Ω
First Mixer Input Capacitance (Cp) – 7.2 – pF
Conversion Voltage Gain, First Mixer – 18 – dB
Conversion Voltage Gain, Second Mixer – 21 –
Dector Output Resistance 13 – 1.4 – kΩ
NOTE: See AN980 for Additional Design Information.
VCC
0.01
33 pF
FL2
0.1
1.0
µ
F
VEE
10.5 Turns
Coilcraft
UNI–10/142
FL1:
muRata CFU455D
or
Toko LFC–4551
FL2:
muRata SFE10.7MA
or
Toko SK107M3–A0–10
19
18
20
21
23
22
2
17
9
14
15
16
RF
Input Ferronics
12–345–K
50
Ω
2:6
120 pF
50 pF
10.245
MHz
FL1
0.1
0.1
68 k
Ω
180 pF
Toko RMC–2A6597HM
MC3362
1
4
5
6
7
8
3
24
10
1312
11
Figure 3. Test Circuit
+
MC3362
3
MOTOROLA ANALOG IC DEVICE DATA
RELATIVE INPUT FREQUENCY (kHz)
– 70 – 100
600
10 20
– 40
– 60
– 30
700
800
– 20
– 70
10
7.0
6.0
5.0
4.0
– 10
3.0
2.0
0
RF INPUT (dBm)
8.0
200
300
400
500
– 90
– 30– 40– 50
– 70
20
– 90 – 80 – 70
– 60
– 120 – 110– 130
RF INPUT (dBm)
2.0
30
10
20
– 50
0
– 10
– 40
– 20
– 30
– 80 0– 10
– 80 – 20– 100
RF INPUT (dBm)
5.0
6.0
4.0
7.0
8.0
3.0
9.0
10
– 30– 40– 50– 60 40
– 50
30
11
– 20– 30 – 10 0
– 50
10
– 100
0
– 90 – 80 – 70 – 30– 60
– 80 – 50 – 40– 120 – 110– 130
RF INPUT (dBm)
0
12
– 130 – 110– 120 – 100
– 10
20
– 70
– 20
– 30
– 60
– 40– 50– 60 – 30
1.0
– 40
0
VCC (V)
3.02.00– 90 – 80 – 70 – 60 1.0 6.0 8.0
1.0
4.0
7.0
3.0
2.0
– 40
Figure 4. IMeter versus Input
100
5.0 0
4.0
I ( A)
10
µ
I (mA)
CC
V (mVrms)
13
POWER (dBm)
S + N, N, AMR (dB)
dB
V (Vdc)
13
VCC
10 MC3362A ICC, Carr. Det. Low (RF in = 10 mV)
ICC, Carr. Det. High (RF in = 0 mV)
Recovered Audio
Figure 5. Drain Current, Recovered Audio
versus Supply
First Mixer Output
Second Mixer Input
RF Input to Transformer
Second Mixer Output
First Mixer Input
Figure 6. Signal Levels
MC3362 13 10 k 10 k
0.010.01
N
S + N 30% AM
S + N
Figure 7. S + N, N, AMR versus Input
Desired Products 3rd Order Intermod.
Products
Figure 8. 1st Mixer 3rd Order Intermodulation Figure 9. Detector Output versus Frequency
MC3362
4MOTOROLA ANALOG IC DEVICE DATA
CRF1 = muRata CFU 455X – the X
suffix denotes 6.0 dB bandwidth.
Rin = Rout = 1.5 to 2.0 kΩ.
CRF2 = muRata SFA10.7 MF5 or
SFE10.7 or equivalent. Rin = Rout
= 330 Ω. Crystal filters can be
used but impedance matching will
need to be added to ensure proper
filter characteristics are realized.
(This network must be tuned to exactly
10.7 MHz above or below the incoming
RF signal.
NOTE: The IF is rolled off above 10.7
MHz to reduce L.O. feedthrough.)
(MC3362)
0.01
0.01
0.41
µ
CRF2
3.0 k
10.7 MHz
Cer. Filt.
to VCC
10.1
10 k
0.001
0.01
Recovered
Audio
FSK Data Output
(optional)
17
18
19
20
22
24
23
Carrier
Detect
455 kHz
LC Resonator
39 k
10 k
51 k
100 k
CD Adjust
0.10.1
0.1
10.245, Fund. Mode
32 pF Load
VCC = 2.0 to 7.0 Vdc
CRF1
120 p 50 p
RF Input
49.67 MHz
50
Ω
1000 p
0.47
µ
+
VCC
33 p
Varactor Control
(keep 0.7 V V23 VCC)
9
10
11
12
16
4
5
6
8.2 k
15
14
13
7
8
21
455 kHz
Cer. Filt.
0.68
µ
Figure 10A. Crystal Oscillator Configuration for Single Channel Application
21
22
0.68
µ
38.97 MHz
VCC
300
20 k
20 k
23
3
1
2
18 p
–
Figure 10. PC Board Test Circuit
(LC Oscillator Configuration Used in PLL Synthesized Receiver)
First Local Oscillator
Buffered Output
Crystal used is series mode resonant
(no load capacity specified), 3rd overtone.
This method has not proven adequate for
fundamental mode, 5th or 7th overtone crystals.
The inductor and capacitor will need to be
changed for other frequency crystals. See
AN980 for further information.
MC3362
MC3362
5
MOTOROLA ANALOG IC DEVICE DATA
METER
DRIVE
.41
µ
H
1.
120p
100K .1
.1
39 MHz
XT
.68
µ
H
455KHz
CF
µ
H
.68
.47
µ
H
10K
TOKO
55VLC06379GT
10K
7
8
1
3
3
1
2
Figure 11. Component Placement View
Showing Crystal Oscillator Circuit
DATA
.1
10.245MHz
XT
2
2
51K
68K
135
REC. AUDIO
.1
CONTROLL.O.OUT
INPUT Vcc CARRIER
DETECT GND
10K
10K
3K
.047
18p
1Kp
50p
.01
.01
330
.01
.01
.01
33p
10.7MHz
CF.047
.2K
3K
NOTES: 1. Recovered Audio components may be deleted when using
data output.
2. Carrier Detect components must be deleted in order to obtain
linear Meter Drive output. With these components in place the
Meter Drive outputs serve only to trip the Carrier Detect indicator.
3. Data Output components should be deleted in applications
where only audio modulation is used. For combined audio/data
applications, the 0.047 µF coupling capacitor will add distortion
to the audio, so a pull–down resistor at pin 13 may be required.
4. Use Toko 7MC81282 Quadrature coil.
4
MC3362P
L.O.OUT CONTROL
10.7 MHz
CF
8.2 K
5. Meter Drive cannot be used simultaneously with Carrier Detect output.
For analog meter drive, remove components labelled ″2″ and measure
meter current (4–12 µA) through ammeter to VCC.
6. Either type of oscillator circuit may be used with any output circuit
configuration.
7. LC Oscillator Coil: Coilcraft UNI 10/42 10.5 turns, 0.41 µH Crystal
Oscillator circuit: trim coil, 0.68 µH. Coilcraft M1287–A.
8. 0.47 H, Coilcraft M1286–A. Input LC network used to match first mixer
input impedance to 50 Ω.
Figure 11A. LC Oscillator Component View
CIRCUIT DESCRIPTION
The MC3362 is a complete FM narrowband receiver from
antenna input to audio preamp output. The low voltage dual
conversion design yields low power drain, excellent
sensitivity and good image rejection in narrowband voice and
data link applications.
In the typical application (Figure 1), the first mixer
amplifies the signal and converts the RF input to 10.7 MHz.
This IF signal is filtered externally and fed into the second
mixer, which further amplifies the signal and converts it to a
455 kHz IF signal. After external bandpass filtering, the low IF
is fed into the limiting amplifier and detection circuitry. The
audio is recovered using a conventional quadrature detector.
Twice–IF filtering is provided internally.
The input signal level is monitored by meter drive circuitry
which detects the amount of limiting in the limiting amplifier.
The voltage at the meter drive pin determines the state of the
carrier detect output, which is active low.
APPLICATIONS INFORMATION
The first local oscillator can be run using a free–running
LC tank, as a VCO using PLL synthesis, or driven from an
external crystal oscillator. It has been run to 190 MHz.* A
buffered output is available at Pin 20. The second local
oscillator is a common base Colpitts type which is typically
run at 10.245 MHz under crystal control. A buffered output is
available at Pin 2. Pins 2 and 3 are interchangeable.
The mixers are doubly balanced to reduce spurious
responses. The first and second mixers have conversion
gains of 18 dB and 22 dB (typical), respectively, as seen in
Figure 6. Mixer gain is stable with respect to supply voltage.
For both conversions, the mixer impedances and pin layout
are designed to allow the user to employ low cost, readily
available ceramic filters. Overall sensitivity and AM rejection
are shown in Figure 7. The input level for 20 dB (S + N)/N is
0.7 µV using the two–pole post–detection filter pictured.
* If the first local oscillator (Pins 21 and/or 22) is driven from a
strong external source (100 mVrms), the mixer can be used to
over 450 MHz.
MC3362
6MOTOROLA ANALOG IC DEVICE DATA
Following the first mixer, a 10.7 MHz ceramic band–pass
filter is recommended. The 10.7 MHz filtered signal is then
fed into one second mixer input pin, the other input pin being
connected to VCC. Pin 6 (VCC) is treated as a common point
for emitter–driven signals.
The 455 kHz IF is typically filtered using a ceramic
bandpass filter then fed into the limiter input pin. The limiter
has 10 µV sensitivity for – 3.0 dB limiting, flat to 1.0 MHz.
The output of the limiter is internally connected to the
quadrature detector, including a quadrature capacitor. A
parallel LC tank is needed externally from Pin 12 to VCC. A 39
kΩ shunt resistance is included which determines the peak
separation of the quadrature detector; a smaller value will
increase the spacing and linearity but decrease recovered
audio and sensitivity.
A data shaping circuit is available and can be coupled to
the recovered audio output of Pin 13. The circuit is a
comparator which is designed to detect zero crossings of
FSK modulation. Data rates are typically limited to 1200 baud
to ensure data integrity and avoid adjacent channel “splatter.”
Hysteresis is available by connecting a high valued resistor
from Pin 15 to Pin 14. Values below 120 kΩ are not
recommended as the input signal cannot overcome the
hysteresis.
The meter drive circuitry detects input signal level by
monitoring the limiting amplifier stages. Figure 4 shows the
unloaded current at Pin 10 versus input power. The meter
drive current can be used directly (RSSI) or can be used to
trip the carrier detect circuit at a specified input power. To do
this, pick an RF trip level in dBm. Read the corresponding
current from Figure 4 and pick a resistor such that:
R10 0.64 Vdc / I10
Hysteresis is available by connecting a high valued resistor
RH between Pins 10 and 11. The formula is:
Hysteresis = VCC/(RH x 10 –7) dB
Figure 12. Circuit Side View
MC3362P
REC. AUDIO DATA METER
DRIVE
GND CARRIER
DETECT VCC INPUT
L.O. OUTCONTROL
4
4
MC3362
7
MOTOROLA ANALOG IC DEVICE DATA
23
21
bias
bias
20
1
1.0
k
Ω
1.0k
Ω
24
100
Ω
6 VCC
4
3
2
10
12
bias bias
14
bias
16
13
VEE
15
11
1.4k
Ω
5
18
17
400
Ω
400
Ω
7
8
9
2.0k
Ω
Figure 13. Representative Schematic Diagram
MC3362
8MOTOROLA ANALOG IC DEVICE DATA
OUTLINE DIMENSIONS
NOTES:
1. CHAMFERED CONTOUR OPTIONAL.
2. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
3. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
4. CONTROLLING DIMENSION: INCH.
–A–
–B–
24 13
12
1
–T–
SEATING
PLANE
24 PL
K
E
F
N
C
D
G
M
A
M
0.25 (0.010) T
24 PLJ
M
B
M
0.25 (0.010) T
L
M
NOTE 1
DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A1.230 1.265 31.25 32.13
B0.250 0.270 6.35 6.85
C0.145 0.175 3.69 4.44
D0.015 0.020 0.38 0.51
E0.050 BSC 1.27 BSC
F0.040 0.060 1.02 1.52
G0.100 BSC 2.54 BSC
J0.007 0.012 0.18 0.30
K0.110 0.140 2.80 3.55
L0.300 BSC 7.62 BSC
M0 15 0 15
N0.020 0.040 0.51 1.01
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS 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.
–A–
–B– P12X
D24X
12
1324
1
M
0.010 (0.25) B M
S
A
M
0.010 (0.25) B S
T
–T–
G
22X
SEATING
PLANE
K
C
RX 45
M
F
J
DIM MIN MAX MIN MAX
INCHESMILLIMETERS
A15.25 15.54 0.601 0.612
B7.40 7.60 0.292 0.299
C2.35 2.65 0.093 0.104
D0.35 0.49 0.014 0.019
F0.41 0.90 0.016 0.035
G1.27 BSC 0.050 BSC
J0.23 0.32 0.009 0.013
K0.13 0.29 0.005 0.011
M0 8 0 8
P10.05 10.55 0.395 0.415
R0.25 0.75 0.010 0.029
P SUFFIX
PLASTIC PACKAGE
CASE 724–03
ISSUE D
DW SUFFIX
PLASTIC PACKAGE
CASE 751E–04
(SO-24L)
ISSUE E
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 can and do vary in different
applications. 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.
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MC3362/D
◊
