Order this document by MC3362/D
. . . 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–POWER DUAL CONVERSION FM RECEIVER
Low Voltage: VCC = 2.0 to 6.0 Vdc
SEMICONDUCTOR TECHNICAL DATA
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
P SUFFIX PLASTIC PACKAGE CASE 724
Manufactured Using Motorolais MOSAICr Process Technology MC13135 is Preferred for New Designs
DW SUFFIX PLASTIC PACKAGE CASE 751E (SO-24L)
Figure 2. Pin Connections and Representative Block Diagram Figure 1. Simplified Application in a PLL Frequency Synthesized Receiver
1st Mixer Input 1
RF Input to 200 MHz
2nd LO Output 2
Figure 2. Input Match 0.01 VCC
120 pF
50 pF
10.245 MHz
Ceramic Filter 455 kHz
10 k
0.1
200 k To Carrier Detect Indicator
24
2
23
3
22
4
21
5
20 MC3362
0.1 0.1
1
6
19
7
18
8
17
9
16
10
15
11
14
12
13
From PLL Phase Detector
22 1st LO Tank
2nd LO Base 4
21 1st LO Tank
2nd Mixer Output 5
Lp = 680 µH Cp = 180 pF
0.41 µH
Limiter Input 7
To PLL or Prescaler
Limiter 8 Decoupling Limiter 9 Decoupling
1.0 + 10 k
18 2nd Mixer Input 17 2nd Mixer Input 16 VEE 15 Comparator Output
Carrier Detect 11 Quadrature Coil 12
14 Comparator Input X
13 Detector Output
0.1 Data
8.2 k
19 1st Mixer Output
Meter Drive 10
VCC
ORDERING INFORMATION Recovered 0.01 Audio
Device MC3362DW MC3362P
Operating Temperature Range TA = – 40 to +85°C
Motorola, Inc. 1996
MOTOROLA ANALOG IC DEVICE DATA
20 1st LO Output
X
VCC 6
0.01
Ceramic Filter 10.7 MHz
23 Varicap Control
2nd LO Emitter 3
0.001
39 K
24 1st Mixer Input X
Package SO–24L Plastic DIP Rev 2
1
MC3362 MAXIMUM RATING (TA = 25°C, unless otherwise noted) Pin
Symbol
Value
Unit
Power Supply Voltage (See Figure 2)
6
Vdc
6
VCC(max) VCC
7.0
Operating Supply Voltage Range (Recommended)
2.0 to 6.0
Vdc
1.0
Vrms
Rating
Input Voltage (VCC
q 5.0 Vdc)
1, 24
Junction Temperature
–
Operating Ambient Temperature Range
–
Storage Temperature Range
–
V1–24 TJ TA Tstg
150
°C
– 40 to + 85
°C
– 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
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
Drain Current (Carrier Detect Low – See Figure 5)
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
–
–
1.4
–
Dector Output Resistance
13
RF Input
kΩ
Figure 3. Test Circuit
Ferronics 12–345–K 50 Ω 120 pF
10.245 MHz
2:6 50 pF
1
24
2
23
3
22
4
21
5 FL1
6
0.1 0.1 68 kΩ 180 pF
VCC
0.01 10.5 Turns Coilcraft UNI–10/142
33 pF
20 MC3362
7
18
8
17
9
16
10
15
11
14
12
13
Toko RMC–2A6597HM
FL1: muRata CFU455D or Toko LFC–4551
19 FL2
0.1
1.0 µF +
FL2: muRata SFE10.7MA or Toko SK107M3–A0–10
VEE
NOTE: See AN980 for Additional Design Information.
2
MOTOROLA ANALOG IC DEVICE DATA
MC3362 Figure 5. Drain Current, Recovered Audio versus Supply
Figure 4. IMeter versus Input 8.0
11
VCC
10
10
MC3362
700 ICC, Carr. Det. Low (RF in = 10 mV)
6.0 5.0
8.0
I CC (mA)
I10 ( µ A)
7.0 A
9.0
800
7.0 6.0 5.0
400
3.0
300 Recovered Audio
3.0
2.0
200
1.0
100
0
2.0 – 130 – 120 – 110 – 100 – 90 – 80 – 70 – 60 – 50 – 40 – 30 RF INPUT (dBm)
0
Figure 6. Signal Levels 20
10
10
0 S + N, N, AMR (dB)
20
Second Mixer Output
– 10
First Mixer Output
– 20
Second Mixer Input
– 30
1.0
2.0
3.0
4.0 VCC (V)
5.0
6.0
7.0
0 8.0
Figure 7. S + N, N, AMR versus Input
30
0 POWER (dBm)
500
ICC, Carr. Det. High (RF in = 0 mV)
4.0
4.0
– 40 – 50
600 V13 (mVrms)
12
First Mixer Input
S+N
– 10 – 20 – 30 S + N 30% AM
– 40 – 50
MC3362 13 10 k
– 60
0.01
N
10 k 0.01
– 60
– 70
RF Input to Transformer – 70 – 130 – 120 – 110 – 100 – 90 – 80 – 70 – 60 – 50 – 40 – 30 RF INPUT (dBm)
– 80 – 130 – 120 – 110 – 100 – 90 – 80 – 70 – 60 RF INPUT (dBm)
Figure 8. 1st Mixer 3rd Order Intermodulation
– 50 – 40
– 30
Figure 9. Detector Output versus Frequency 4.0
20 10 0
3.0
– 10 V13 (Vdc)
dB
– 20 – 30 – 40 – 50
Desired Products 3rd Order Intermod. Products
– 60
2.0
1.0
– 70 – 80 – 100 – 90
– 80
– 70 – 60 – 50 – 40 – 30 RF INPUT (dBm)
MOTOROLA ANALOG IC DEVICE DATA
– 20 – 10
0
0 – 40
– 30
10 20 – 20 – 10 0 RELATIVE INPUT FREQUENCY (kHz)
30
40
3
MC3362 Figure 10. PC Board Test Circuit (LC Oscillator Configuration Used in PLL Synthesized Receiver)
18 p
RF Input 49.67 MHz 50 Ω
1000 p 1
24 0.01
0.47 µ
2
p p VCC)
Varactor Control (keep 0.7 V V23
23 0.01
VCC = 2.0 to 7.0 Vdc 120 p
3
22
4
21
10.245, Fund. Mode 32 pF Load
5
20
455 kHz Cer. Filt.
0.41 µ
33 p
50 p
First Local Oscillator Buffered Output
3.0 k
VCC
CRF1 6
19
7
18
CRF2
0.1 0.1
8
17
9
16
10
15
0.1
(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.)
to VCC
CRF1 = muRata CFU 455X – the X suffix denotes 6.0 dB bandwidth. Rin = Rout = 1.5 to 2.0 kΩ.
1
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.
10.7 MHz Cer. Filt. 0.1
100 k 51 k
10 k
CD Adjust 10 k Carrier Detect
39 k
–+
11
14
FSK Data Output (optional)
0.001 12
13 8.2 k
455 kHz LC Resonator
0.01
Recovered Audio
(MC3362)
Figure 10A. Crystal Oscillator Configuration for Single Channel Application
MC3362
23
22
20 k 0.68 µ VCC
300 21
0.68 µ
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.
20 k 38.97 MHz
4
MOTOROLA ANALOG IC DEVICE DATA
MC3362 Figure 11. Component Placement View Showing Crystal Oscillator Circuit
Figure 11A. LC Oscillator Component View
L.O.OUT 1
.047
1
.2K
3
METER DRIVE
DATA
L.O.OUT
GND
4
TOKO 55VLC06379GT
5
CONTROL
CONTROL 330
1
3K
3
10.7MHz CF
10K 68K
3 8.2 K
2
10K
3K
2
.01
.047
CARRIER DETECT
10K
10K
.1
.1 51K
.41 µH
7
33p
CF 455KHz .1
2
.68 µH 39 MHz XT
10.7 MHz CF
.1
100K
.01
.01 50p
MC3362P
18p
Vcc
120p 10.245MHz XT
1.
.68 µH
1Kp
.47 µH
.01
.01
INPUT 8
REC. AUDIO
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.
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 .
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.
MOTOROLA ANALOG IC DEVICE DATA
5
MC3362 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:
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
'
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
INPUT
Figure 12. Circuit Side View
MC3362P
GND
L.O. OUT
CARRIER DETECT
VCC
CONTROL
4I
REC. AUDIO
METER DRIVE
DATA
4I
6
MOTOROLA ANALOG IC DEVICE DATA
MOTOROLA ANALOG IC DEVICE DATA
7 2.0 kΩ 8 9
bias
21
23
bias
1
20
1.0 kΩ
1.0 kΩ
24
10
100 Ω
12
2
3
4
6 VCC
bias
Figure 13. Representative Schematic Diagram
17
400 Ω
16
13
bias
14
bias
18
VEE
400 Ω
15
11
1.4 kΩ 5
MC3362
7
MC3362 OUTLINE DIMENSIONS P SUFFIX PLASTIC PACKAGE CASE 724–03 ISSUE D
–A– 24
13
1
12
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.
–B–
L
C –T–
NOTE 1
K
SEATING PLANE
N
E G
M J
F D
24 PL
0.25 (0.010)
24 PL
0.25 (0.010)
M
T A
13
–B–
M
M
12X
M
B
M
12
24X
D
J
0.010 (0.25)
M
T A
S
B
S
F R C –T– SEATING PLANE
M 22X
INCHES MIN MAX 1.230 1.265 0.250 0.270 0.145 0.175 0.015 0.020 0.050 BSC 0.040 0.060 0.100 BSC 0.007 0.012 0.110 0.140 0.300 BSC 0_ 15_ 0.020 0.040
MILLIMETERS MIN MAX 31.25 32.13 6.35 6.85 3.69 4.44 0.38 0.51 1.27 BSC 1.02 1.52 2.54 BSC 0.18 0.30 2.80 3.55 7.62 BSC 0_ 15_ 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.
P 0.010 (0.25)
1
T B
DW SUFFIX PLASTIC PACKAGE CASE 751E–04 (SO-24L) ISSUE E
–A– 24
M
DIM A B C D E F G J K L M N
X 45 _
DIM A B C D F G J K M P R
MILLIMETERS MIN MAX 15.25 15.54 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_ 10.05 10.55 0.25 0.75
INCHES MIN MAX 0.601 0.612 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
K
G
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. Mfax is a trademark of Motorola, Inc. How to reach us: USA / EUROPE / Locations Not Listed: Motorola Literature Distribution; P.O. Box 5405, Denver, Colorado 80217. 303–675–2140 or 1–800–441–2447
JAPAN: Nippon Motorola Ltd.: SPD, Strategic Planning Office, 4–32–1, Nishi–Gotanda, Shinagawa–ku, Tokyo 141, Japan. 81–3–5487–8488
Mfax:
[email protected] – TOUCHTONE 602–244–6609 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, – US & Canada ONLY 1–800–774–1848 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298 INTERNET: http://motorola.com/sps
8
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MOTOROLA ANALOG IC DEVICE DATA MC3362/D
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