MOTOROLA MC3371DTB Low power fm if Datasheet

Order this document by MC3371/D
LOW POWER
FM IF
The MC3371 and MC3372 perform single conversion FM reception and
consist of an oscillator, mixer, limiting IF amplifier, quadrature discriminator,
active filter, squelch switch, and meter drive circuitry. These devices are
designed for use in FM dual conversion communication equipment. The
MC3371/MC3372 are similar to the MC3361/MC3357 FM IFs, except that a
signal strength indicator replaces the scan function controlling driver which is
in the MC3361/MC3357. The MC3371 is designed for the use of parallel LC
components, while the MC3372 is designed for use with either a 455 kHz
ceramic discriminator, or parallel LC components.
These devices also require fewer external parts than earlier products. The
MC3371 and MC3372 are available in dual–in–line and surface mount
packaging.
• Wide Operating Supply Voltage Range: VCC = 2.0 to 9.0 V
•
•
•
•
•
•
16
1
P SUFFIX
PLASTIC PACKAGE
CASE 648
Input Limiting Voltage Sensitivity of –3.0 dB
Low Drain Current: ICC = 3.2 mA, @ VCC = 4.0 V, Squelch Off
16
1
Minimal Drain Current Increase When Squelched
D SUFFIX
PLASTIC PACKAGE
CASE 751B
(SO–16)
Signal Strength Indicator: 60 dB Dynamic Range
Mixer Operating Frequency Up to 100 MHz
Fewer External Parts Required than Earlier Devices
16
MAXIMUM RATINGS
1
Rating
Power Supply Voltage
Pin
Symbol
Value
Unit
4
10
Vdc
DTB SUFFIX
PLASTIC PACKAGE
CASE 948F
(TSSOP–16)
16
VCC(max)
V16
1.0
Vrms
Detector Input Voltage
8
V8
1.0
Vpp
Squelch Input Voltage
(VCC
4.0 Vdc)
12
V12
6.0
Vdc
Mute Function
14
–0.7 to 10
Mute Sink Current
14
V14
l14
50
Vpk
mA
Junction Temperature
–
150
°C
MC3371DTB
Storage Temperature Range
–
TJ
Tstg
–65 to +150
°C
MC3371P
RF Input Voltage (VCC
q 4.0 Vdc)
q
ORDERING INFORMATION
Device
Operating
Temperature Range
MC3371D
NOTES: 1. Devices should not be operated at these values. The “Recommended Operating
Conditions” table provides conditions for actual device operation.
2. ESD data available upon request.
Package
SO–16
TSSOP–16
TA = –30° to +70°C
MC3372D
Plastic DIP
SO–16
MC3372DTB
TSSOP–16
MC3372P
Plastic DIP
PIN CONNECTIONS
1
16 Mixer Input
2
15 Gnd
Mixer Output 3
14 Mute
VCC 4
Limiter Input 5
13 Meter Drive
Crystal Osc
Decoupling
MC3371
(Top View)
1
16 Mixer Input
2
15 Gnd
Mixer Output 3
14 Mute
Crystal Osc
VCC 4
12 Squelch Input
Limiter Input 5
6
11 Filter Output
Decoupling 6
7
10 Filter Input
Quad Coil 8
9 Recovered Audio
MC3372
(Top View)
Limiter Output 7
Quad Input 8
 Motorola, Inc. 1996
MOTOROLA ANALOG IC DEVICE DATA
13 Meter Drive
12 Squelch Input
11 Filter Output
10 Filter Input
9 Recovered Audio
Rev 1
1
MC3371 MC3372
RECOMMENDED OPERATING CONDITIONS
Rating
Pin
Symbol
Value
Unit
Supply Voltage
(@ TA = 25°C)
( –30°C
TA
+75°C)
4
VCC
2.0 to 9.0
2.4 to 9.0
Vdc
RF Input Voltage
16
0.0005 to 10
mVrms
RF Input Frequency
16
Vrf
frf
0.1 to 100
MHz
Oscillator Input Voltage
1
80 to 400
mVrms
Intermediate Frequency
–
Vlocal
fif
455
kHz
Limiter Amp Input Voltage
5
0 to 400
mVrms
Filter Amp Input Voltage
10
Vif
Vfa
0.1 to 300
mVrms
Squelch Input Voltage
12
Vdc
14
Vsq
lsq
0 or 2
Mute Sink Current
0.1 to 30
mA
Ambient Temperature Range
–
TA
–30 to +70
°C
p p
AC ELECTRICAL CHARACTERISTICS (VCC = 4.0 Vdc, fo = 58.1125 MHz, df = ±3.0 kHz, fmod = 1.0 kHz, 50 Ω source,
flocal = 57.6575 MHz, Vlocal = 0 dBm, TA = 25°C, unless otherwise noted)
Characteristic
Pin
Symbol
Input for 12 dB SINAD
Matched Input – (See Figures 11, 12 and 13)
Unmatched Input – (See Figures 1 and 2)
–
VSIN
Input for 20 dB NQS
–
VNQS
Recovered Audio Output Voltage
Vrf = –30 dBm
–
AFO
Recovered Audio Drop Voltage Loss
Vrf = –30 dBm, VCC = 4.0 V to 2.0 V
–
Meter Drive Output Voltage (No Modulation)
Vrf = –100 dBm
Vrf = –70 dBm
Vrf = –40 dBm
13
Filter Amp Gain
Rs = 600 Ω , fs = 10 kHz, Vfa = 1.0 mVrms
–
Mixer Conversion Gain
Vrf = –40 dBm, RL = 1.8 kΩ
–
Signal to Noise Ratio
Vrf = –30 dBm
–
Total Harmonic Distortion
Vrf = –30 dBm, BW = 400 Hz to 30 kHz
–
Detector Output Impedance
9
ZO
Detector Output Voltage (No Modulation)
Vrf = –30 dBm
9
DVO
Meter Drive
Vrf = –100 to –40 dBm
13
Meter Drive Dynamic Range
RFIn
IFIn (455 kHz)
13
Mixer Third Order Input Intercept Point
f1 = 58.125 MHz
f2 = 58.1375 MHz
–
Mixer Input Resistance
16
Mixer Input Capacitance
16
2
Min
Typ
Max
–
–
1.0
5.0
–
15
–
3.5
–
120
200
320
–8.0
–1.5
–
–
1.1
2.0
0.3
1.5
2.5
0.5
1.9
3.1
47
50
–
14
20
–
36
67
–
–
0.6
3.4
–
450
–
µVrms
µVrms
mVrms
AFloss
MDrv
MV1
MV2
MV3
Unit
dB
Vdc
AV(Amp)
dB
AV(Mix)
dB
s/n
dB
THD
%
Ω
Vdc
–
1.45
–
–
0.8
–
–
–
60
80
–
–
µA/dB
MO
MVD
dB
ITOMix
dBm
–
–22
–
Rin
–
3.3
–
kΩ
Cin
–
2.2
–
pF
MOTOROLA ANALOG IC DEVICE DATA
MC3371 MC3372
DC ELECTRICAL CHARACTERISTICS (VCC = 4.0 Vdc, TA = 25°C, unless otherwise noted)
Characteristic
Pin
Drain Current (No Input Signal)
Squelch Off, Vsq = 2.0 Vdc
Squelch On, Vsq = 0 Vdc
Squelch Off, VCC = 2.0 to 9.0 V
4
Detector Output (No Input Signal)
DC Voltage, V8 = VCC
9
Filter Output (No Input Signal)
DC Voltage
Voltage Change, VCC = 2.0 to 9.0 V
11
Trigger Hysteresis
–
Symbol
Min
Typ
Max
lcc1
lcc2
dlcc1
–
–
–
3.2
3.6
1.0
4.2
4.8
2.0
0.9
1.6
2.3
V11
dV11
1.5
2.0
2.5
5.0
3.5
8.0
Hys
34
57
80
Unit
mA
V9
Vdc
Vdc
mV
Figure 1. MC3371 Functional Block Diagram and Test Fixture Schematic
RSSI Output
RF Input
VCC = 4.0 Vdc
FilterIn
0.1
51 k
C1
0.01
SqIn
1.0 µF
FilterOut
51
1.0 µF
14
15
0.01
510 k
Mute
16
470
13
12
11
8.2 k
10
9
Filter –
Amp
+
Squelch Trigger
with Hysteresis
AF Out
to Audio
Power Amp
AF
Amp
Demodulator
10
Mixer
Limiter
Amp
51 k
1.8 k
Oscillator
1
53 k
2
3
4
5
6
7
8
15
57.6575
MHz
22
0.1
0.33
Quad Coil TOKO
2A6597 HK (10 mm)
or
7MC–8128Z (7 mm)
0.1
20 k
0.001
muRata
CFU455D2
or
equivalent
MOTOROLA ANALOG IC DEVICE DATA
0.1
3
MC3371 MC3372
Figure 2. MC3372 Functional Block Diagram and Test Fixture Schematic
RSSI Output
RF Input
VCC = 4.0 Vdc
FilterIn
0.1
51 k
C1
0.01
SqIn
1.0 µF
FilterOut
51
1.0 µF
15
14
0.01
510 k
Mute
16
470
13
12
11
8.2 k
10
Filter –
Amp
+
Squelch Trigger
with Hysteresis
AF Out
to Audio
Power Amp
9
AF
Amp
Demodulator
10
Mixer
Limiter
Amp
53 k
Oscillator
1
2
3
4
15
57.6575
MHz
22
5
6
R10
1.8 k
0.33
C12
0.1
7
C13
0.1
R11
51 k
8
C14
27
R12
4.3 k
muRata
CDB455C16
0.001
muRata
CFU455D2
or
equivalent
4
Ceramic
Resonator
C15
0.1
MOTOROLA ANALOG IC DEVICE DATA
MC3371 MC3372
TYPICAL CURVES
(Unmatched Input)
Figure 4. RSSI versus RF Input
5.0
70
VCC = 4.0 Vdc
RF Input = –30 dBm
fo = 10.7 MHz
4.0
50
3.0
2.0
TA = –30°C
40
TA = 25°C
30
VCC = 4.0 Vdc
fo = 10.7 MHz
20
1.0
10
0
–55
–35
–15
5.0
25
45
85
65
TA, AMBIENT TEMPERATURE (°C)
105
TA = 75°C
0
–140 –120
125
–100
TA = –30°C
–80
–60
–40
Figure 5. RSSI Output versus Temperature
20
Figure 6. Mixer Output versus RF Input
–30 dBm
MIXER OUTPUT (dBm)
VCC = 4.0 Vdc
fo = 10.7 MHz
42
36
30
–70 dBm
24
100 MHz
Desired Products
–10
48
18
–20
100 MHz
3rd Order Products
–30
–40
–50
12
VCC = 4.0 Vdc
TA = 27°C
–60
6.0
–110 dBm
0
–55
–35
–15
25
45
65
5.0
85
TA, AMBIENT TEMPERATURE (°C)
105
–70
– 70
125
– 60
– 50
– 40
– 30
– 20
– 10
0
10
RF INPUT (dBm)
Figure 7. Mixer Gain versus Supply Voltage
30
27
Figure 8. Mixer Gain versus Frequency
40
TA = 75°C
VCC = 4.0 Vdc
TA = 27°C
RFin = –40 dBm
21
TA = –30°C
MIXER GAIN (dB)
24
RSSI OUTPUT( µ A)
0
0
54
TA = 25°C
18
15
12
fo = 10.7 MHz
RFin –40 dBm
1.8 kΩ Load
9.0
6.0
30
–10 dBm
20
–15 dBm
–20 dBm
10
5.0 dBm
0 dBm
3.0
0
–20
RF INPUT (dBm)
60
RSSI OUTPUT( µ A)
TA = 75°C
60
RSSI OUT (µ A)
THD, TOTAL HARMONIC DISTORTION (%)
Figure 3. Total Harmonic Distortion
versus Temperature
0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
VCC, SUPPLY VOLTAGE (V)
MOTOROLA ANALOG IC DEVICE DATA
8.0
9.0
10
0
1.0
–5.0 dBm
10
100
1000
f, FREQUENCY (MHz)
5
MC3371 MC3372
MC3371 PIN FUNCTION DESCRIPTION
OPERATING CONDITIONS VCC = 4.0 Vdc, RFIn = 100 µV, fmod = 1.0 kHz, fdev = 3.0 kHz. MC3371 at fRF = 10.7 MHz (see Figure 11).
Pin
Symbol
1
OSC1
Internal Equivalent
Circuit
Description
Waveform
The base of the Colpitts oscillator. Use
a high impedance and low capacitance
probe or a “sniffer” to view the wave–
form without altering the frequency.
Typical level is 450 mVpp.
VCC
1
15 k
OSC1
2
2
OSC2
The emitter of the Colpitts oscillator.
Typical signal level is 200 mVpp. Note
that the signal is somewhat distorted
compared to that on Pin 1.
OSC2
200
µA
3
MXOut
VCC
3
4
MixerOut
Output of the Mixer. Riding on the
455 kHz is the RF carrier component.
The typical level is approximately
60 mVpp.
1.5 k
4
VCC
Supply Voltage –2.0 to 9.0 Vdc is the
operating range. VCC is decoupled to
ground.
100
µA
5
IFIn
5
IFIn
1.8 k
6
53 k
Input to the IF amplifier after passing
through the 455 kHz ceramic filter. The
signal is attenuated by the filter. The
typical level is approximately
50 mVpp.
DEC1
7
6
7
DEC1
DEC2
8
Quad
Coil
51 k
DEC2
60 µA
8
Quad Coil
VCC
IF Decoupling. External 0.1 µF
capacitors connected to VCC.
Quadrature Tuning Coil. Composite
(not yet demodulated) 455 kHz IF
signal is present. The typical level is
500 mVpp.
10
50 µA
6
MOTOROLA ANALOG IC DEVICE DATA
MC3371 MC3372
MC3371 PIN FUNCTION DESCRIPTION (continued)
OPERATING CONDITIONS VCC = 4.0 Vdc, RFIn = 100 µV, fmod = 1.0 kHz, fdev = 3.0 kHz. MC3371 at fRF = 10.7 MHz (see Figure 11).
Pin
Symbol
9
RA
Internal Equivalent
Circuit
Description
Waveform
Recovered Audio. This is a composite
FM demodulated output having signal
and carrier component. The typical
level is 1.4 Vpp.
VCC
200
9
RAOut
O t
100 µA
10
FilIn
10
The filtered recovered audio has the
carrier component removed and is
typically 800 mVpp.
Filter Amplifier Input
FilterIn
VCC
30 µA
11
FilOut
Filter Amplifier Output. The typical
signal level is 400 mVpp.
VCC
240 µA
11
12
FilterOut
SqIn
Squelch Input. See discussion in
application text.
12
SqIn
12 µA
MOTOROLA ANALOG IC DEVICE DATA
7
MC3371 MC3372
MC3371 PIN FUNCTION DESCRIPTION (continued)
OPERATING CONDITIONS VCC = 4.0 Vdc, RFIn = 100 µV, fmod = 1.0 kHz, fdev = 3.0 kHz. MC3371 at fRF = 10.7 MHz (see Figure 11).
Pin
Symbol
13
RSSI
Internal Equivalent
Circuit
VCC
1.8 k
Bias
Description
Waveform
RSSI Output. Referred to as the
Received Signal Strength Indicator or
RSSI. The chip sources up to 60 µA
over the linear 60 dB range. This pin
may be used many ways, such as:
AGC, meter drive and carrier triggered
squelch circuit.
13
RSSIOut
14
MUTE
14 Mute or
SqOut
Mute Output. See discussion in
application text.
40 k
15
Gnd
Gnd
16
MIXIn
Ground. The ground area should be
continuous and unbroken. In a two–
sided layout, the component side has
the ground plane. In a one–sided
layout, the ground plane fills around
the traces on the circuit side of the
board and is not interrupted.
15
VCC
16
Mixer Input –
Series Input Impedance:
@ 10 MHz: 309 – j33 Ω
@ 45 MHz: 200 – j13 Ω
MixerIn
3.3 k
10 k
*Other pins are the same as pins in MC3371.
8
MOTOROLA ANALOG IC DEVICE DATA
MC3371 MC3372
MC3372 PIN FUNCTION DESCRIPTION
OPERATING CONDITIONS VCC = 4.0 Vdc, RFIn = 100 µV, fmod = 1.0 kHz, fdev = 3.0 kHz. MC3372 at fRF = 45 MHz (see Figure 13).
Pin
Symbol
5
IFIn
Internal Equivalent
Circuit
Description
Waveform
IF Amplifier Input
5
IFIn
53 k
6
6
DEC1
DEC
60 µA
7
IFOut
VCC
IF Decoupling. External 0.1 µF
capacitors connected to VCC.
IF Amplifier Output Signal level is
typically 300 mVpp.
7
IFOut
50 µA
120 µA
8
QuadIn
Quadrature Detector Input. Signal
level is typically 150 mVpp.
8
QuadIn
VCC
10
9
50 µA
RA
Recovered Audio. This is a composite
FM demodulated output having signal
and carrier components. Typical level
is 800 mVpp.
VCC
200
9
RAOut
100 µA
MOTOROLA ANALOG IC DEVICE DATA
The filtered recovered audio has the
carrier signal removed and is typically
500 mVpp.
9
MC3371 MC3372
Figure 9. MC3371 Circuit Schematic
MixerOut
3
MixerIn
16
4
VCC
Meter Out
13
FilterIn
10
12 Squelch In
1
11
FilterOut
OSC1
2
X
X
Y
OSC2
Bias
8
4
10
5
DEC1
Squelch Out
15
Gnd
VCC
1.8 k
6
14
Bias
100
µA
200 µA
IFIn
–
+
QuadIn
X
Y X
Yi
200
9
RAOut
53 k
51 k
7
DEC2
100 µA
Figure 10. MC3372 Circuit Schematic
MixerIn
16
4
VCC
MixerOut
3
Meter Out
13
FilterIn
10
12 Squelch In
1
11
FilterOut
OSC1
2
X
X
Y
OSC2
100
µA
Bias
15
Gnd
QuadIn
VCC
10
5
IFIn
IFOut
Squelch Out
8
4
6
14
Bias
200 µA
DEC
–
+
X
Y X
Yi
200
9
RAOut
53 k
7
100 µA
10
MOTOROLA ANALOG IC DEVICE DATA
MC3371 MC3372
CIRCUIT DESCRIPTION
The MC3371 and MC3372 are low power narrowband FM
receivers with an operating frequency of up to 60 MHz. Its low
voltage design provides low power drain, excellent
sensitivity, and good image rejection in narrowband voice
and data link applications.
This part combines a mixer, an IF (intermediate frequency)
limiter with a logarithmic response signal strength indicator, a
quadrature detector, an active filter and a squelch trigger
circuit. In a typical application, the mixer amplifier converts an
RF input signal to a 455 kHz IF signal. Passing through an
external bandpass filter, the IF signal is fed into a limiting
amplifier and detection circuit where the audio signal is
recovered. A conventional quadrature detector is used.
The absence of an input signal is indicated by the
presence of noise above the desired audio frequencies. This
“noise band” is monitored by an active filter and a detector. A
squelch switch is used to mute the audio when noise or a
tone is present. The input signal level is monitored by a meter
drive circuit which detects the amount of IF signal in the
limiting amplifier.
APPLICATIONS INFORMATION
The oscillator is an internally biased Colpitts type with the
collector, base, and emitter connections at Pins 4, 1 and 2
respectively. This oscillator can be run under crystal control.
For fundamental mode crystals use crystal characterized
parallel resonant for 32 pF load. For higher frequencies, use
3rd overtone series mode type crystals. The coil (L2) and
resistor RD (R13) are needed to ensure proper and stable
operation at the LO frequency (see Figure 13, 45 MHz
application circuit).
The mixer is doubly balanced to reduce spurious radiation.
Conversion gain stated in the AC Electrical Characteristics
table is typically 20 dB. This power gain measurement was
made under stable conditions using a 50 Ω source at the
input and an external load provided by a 455 kHz ceramic
filter at the mixer output which is connected to the VCC (Pin 4)
and IF input (Pin 5). The filter impedance closely matches the
1.8 kΩ internal load resistance at Pin 3 (mixer output). Since
the input impedance at Pin 16 is strongly influenced by a
3.3 kΩ internal biasing resistor and has a low capacitance,
the useful gain is actually much higher than shown by the
standard power gain measurement. The Smith Chart plot in
Figure 17 shows the measured mixer input impedance
versus input frequency with the mixer input matched to a
50 Ω source impedance at the given frequencies. In order to
assure stable operation under matched conditions, it is
necessary to provide a shunt resistor to ground. Figures 11,
12 and 13 show the input networks used to derive the mixer
input impedance data.
Following the mixer, a ceramic bandpass filter is
recommended for IF filtering (i.e. 455 kHz types having a
bandwidth of ±2.0 kHz to ±15 kHz with an input and output
impedance from 1.5 kΩ to 2.0 kΩ). The 6 stage limiting IF
MOTOROLA ANALOG IC DEVICE DATA
amplifier has approximately 92 dB of gain. The MC3371 and
MC3372 are different in the limiter and quadrature detector
circuits. The MC3371 has a 1.8 kΩ and a 51 kΩ resistor
providing internal dc biasing and the output of the limiter is
internally connected, both directly and through a 10 pF
capacitor to the quadrature detector; whereas, in the
MC3372 these components are not provided internally. Thus,
in the MC3371, no external components are necessary to
match the 455 kHz ceramic filter, while in the MC3372,
external 1.8 kΩ and 51 kΩ biasing resistors are needed
between Pins 5 and 7, respectively (see Figures 12 and 13).
In the MC3371, a parallel LCR quadrature tank circuit is
connected externally from Pin 8 to VCC (similar to the
MC3361). In the MC3372, a quadrature capacitor is needed
externally from Pin 7 to Pin 8 and a parallel LC or a ceramic
discriminator with a damping resistor is also needed from
Pin 8 to VCC (similar to the MC3357). The above external
quadrature circuitry provides 90° phase shift at the IF center
frequency and enables recovered audio.
The damping resistor determines the peak separation of
the detector and is somewhat critical. As the resistor is
decreased, the separation and the bandwidth is increased
but the recovered audio is decreased. Receiver sensitivity is
dependent on the value of this resistor and the bandwidth of
the 455 kHz ceramic filter.
On the chip the composite recovered audio, consisting of
carrier component and modulating signal, is passed through
a low pass filter amplifier to reduce the carrier component
and then is fed to Pin 9 which has an output impedance of
450 Ω . The signal still requires further filtering to eliminate
the carrier component, deemphasis, volume control, and
further amplification before driving a loudspeaker. The
relative level of the composite recovered audio signal at Pin 9
should be considered for proper interaction with an audio
post amplifier and a given load element. The MC13060 is
recommended as a low power audio amplifier.
The meter output indicates the strength of the IF level and
the output current is proportional to the logarithm of the IF
input signal amplitude. A maximum source current of 60 µA is
available and can be used to drive a meter and to detect a
carrier presence. This is referred to as a Received Strength
Signal Indicator (RSSI). The output at Pin 13 provides a
current source. Thus, a resistor to ground yields a voltage
proportional to the input carrier signal level. The value of this
resistor is estimated by (VCC(Vdc) – 1.0 V)/60 µA; so for
VCC = 4.0 Vdc, the resistor is approximately 50 kΩ and
provides a maximum voltage swing of about 3.0 V.
A simple inverting op amp has an output at Pin 11 and the
inverting input at Pin 10. The noninverting input is connected
to 2.5 V. The op amp may be used as a noise triggered
squelch or as an active noise filter. The bandpass filter is
designed with external impedance elements to discriminate
between frequencies. With an external AM detector, the
filtered audio signal is checked for a tone signal or for the
presence of noise above the normal audio band. This
information is applied to Pin 12.
11
MC3371 MC3372
Another possible application of the squelch switch may
be as a carrier level triggered squelch circuit, similar to the
MC3362/MC3363 FM receivers. In this case the meter
output can be used directly to trigger the squelch switch
when the RF input at the input frequency falls below the
desired level. The level at which this occurs is determined
by the resistor placed between the meter drive output
(Pin 13) and ground (Pin 15).
An external positive bias to Pin 12 sets up the squelch
trigger circuit such that the audio mute (Pin 14) is open or
connected to ground. If Pin 12 is pulled down to 0.9 V or
below by the noise or tone detector, Pin 14 is internally
shorted to ground. There is about 57 mV of hyteresis at
Pin 12 to prevent jitter. Audio muting is accomplished by
connecting Pin 14 to the appropriate point in the audio path
between Pin 9 and an audio amplifier. The voltage at Pin 14
should not be lower than –0.7 V; this can be assured by
connecting Pin 14 to the point that has no dc component.
Figure 11. Typical Application for MC3371 at 10.7 MHz
VCC = 4.0 Vdc
+
RSSI Output
R2
10 k
1st IF 10.7 MHz
from Input
Front End
C9
10
R3
100 k
8.2 µH
L2
+
C2
4.7
µF
C15
91
L1
TKANS9443HM
6.8 µH ±6%
R11
560
R1
51 k
C1
0.01
R4
1.0 k
D1
1N5817 R5
4.7 k R6
C3
0.1
C17
0.1
C4
0.001
C5
0.001
R9
VR1 (Squelch Control)
10 k
560
R7
R8
4.7 k
3.3 k
15
14
13
12
11
Squelch Trigger
with Hysteresis
Mixer
1
Oscillator
2
3
9
10
AF
Filter –
Amp
Amp
+
Demodulator
Limiter
Amp
4
5 1.8 k 6
51 k
10
53 k
7
8
C8
0.22
VR2
10 k
510 k
16
C7
0.022
AF Out
to Audio
Power Amp
C10
10.245
MHz
68
C12
0.1
C11
220
muRata
CFU455D2
or
equivalent
12
C13
0.1
R10
39 k
T2: Toko
2A6597 HK (10 mm)
or
7MC–8128Z (7 mm)
C14
0.1
MOTOROLA ANALOG IC DEVICE DATA
MC3371 MC3372
Figure 12. Typical Application for MC3372 at 10.7 MHz
VCC = 4.0 Vdc
+
RSSI Output
R2
10 k
1st IF 10.7 MHz
from Input
Front End
C9
10
8.2 µH
L2
+
C2
4.7
µF
C16
91
L1
TKANS9443HM
6.8 µH ± 6%
R13
560
R1
51 k
C1
0.01
R4
1.0 k
D1
1N5817 R5
VR1 (Squelch Control)
10 k
4.7 k R6
C3
0.1
C6
0.1
560
C4
0.001
R8
R7
3.3 k C7
0.022
4.7 k
C5
0.001
C8
0.22
R9
16
15
14
13
510 k
10
11
–
Filter
Amp
+
12
Squelch Trigger
with Hysteresis
Oscillator
2
3
Limiter
Amp
4
C10
10.245
MHz
68
5
6
R10
1.8k
C2
220
C12
0.1
muRata
CFU455D2
or
equivalent
MOTOROLA ANALOG IC DEVICE DATA
9
AF
Amp
AF Out
to Audio
Power Amp
Demodulator
Mixer
1
VR2
10 k
10
53 k
7
C13
0.1
R11
51 k
8
C14
27p
R12
4.3 k
muRata
CDB455C16
C15
0.1
13
MC3371 MC3372
Figure 13. Typical Application for MC3372 at 45 MHz
RSSI Output
to Meter (Triplett – 100 kV)
VCC = 4.0 Vdc
+
C9
10
R3
100 k
RF Input
45 MHz C17
120
+
C2
4.7
C18
75
R2
12 k
L1
0.245 µH
Coilcraft
150–07J08
D1
C3
0.1
16
C5
0.001
15
14
13
12
Oscillator
2
3
4
5
6
C10
44.545
MHz
560
R7
4.7 k
R10
1.8 k
C11
5.0
30
L2
0.84 µH
C12
0.1
7
R11
51 k
R12
4.3 k
R13
1.0 k
muRata
CDB455C16
Figure 15. RSSI Output versus RF Input
3.0
RSSI OUTPUT (Vdc)
3.0
2.5
2.0
fRF = 10.7 MHz
VCC = 4.0 Vdc
Reference Figure 11
1.0
AF Out
to Audio
Power Amp
C15
0.1
3.5
1.5
VR2
10 k
C14
27
Figure 14. RSSI Output versus RF Input
RSSI OUTPUT (Vdc)
C8
0.22
C7
0.022
C13
0.1
3.5
0.5
14
3.3 k
8
muRata
CFU455D2
or
equivalent
0
–120
R8
R9
Mixer
1
VR1 (Squelch Control)
10 k
510 k
11
10
9
–
AF
Filter
Amp
Amp
+
Demodulator
10
Limiter
Amp
53 k
Squelch Trigger
with Hysteresis
Coilcraft
143–13J12
C4
0.001
R1
470
C1
0.01
C16
0.01
1N5817 R5
4.7 k R6
C6
0.1
R14
51 k
R4
1.0 k
2.5
2.0
1.5
fRF = 45 MHz
VCC = 4.0 Vdc
Reference Figure 13
1.0
0.5
–100
–80
–60
–40
–20
0
–120
–100
–80
–60
RF INPUT (dBm)
–40
–20
MOTOROLA ANALOG IC DEVICE DATA
MC3371 MC3372
Figure 16. S + N, N, AMR versus Input
10
S+N
S + N, N, AMR (dB)
0
–10
fRF = 10.7 MHz
VCC = 4.0 V
TA = 25°C
–20
–30
S + N 30% AM
–40
–50
N
–60
–130
–110
–90
–70
–50
–30
–10
RF INPUT (dBm)
* Reference Figures 11, 12 and 13
Figure 17. Mixer Input Impedance versus Frequency
+j50
+j25
+j100
+j150
+j10
VCC = 4.0 Vdc
RF Input = –40 dBm
+j250
+j500
0
10
25
50
100
150
250
500
45 MHz 10.7 MHz
–j500
–j250
–j10
–j150
–j100
–j25
–j50
MOTOROLA ANALOG IC DEVICE DATA
15
MC3371 MC3372
Figure 18. MC3371 PC Board Component View with Matched Input at 10.7 MHz
COMPONENT SIDE
VCC GND
CUT
.325I
C9
J3
C14
CFU
VCC
455D 2
C13 C12
T2
AF OUT
R10
J2
BNC
MC3371
IF 10.7 MHZ
FRONT END
MC3371
VR2
R8
+
CUT
.325I
GND
C11
C10
XTAL
10.245
MHZ
J1
C16
C15
INPUT IF
10.7 MHZ
C1
L2
C2
BNC
C R9
+
C3
C8
R7 5
R11 L1
C7
C4
J4
D1
CUT METER
R6
R5
.325I OUT
R4
VR1
C17 R1
R3
R2
J3
VCC
Figure 19. MC3371 PC Board Circuit or Solder Side as Viewed through Component Side
SOLDER SIDE
Above PC Board is laid out for the circuit in Figure 11.
16
MOTOROLA ANALOG IC DEVICE DATA
MC3371 MC3372
Figure 20. MC3372P PC Board Component View with Matched Input at 10.7 MHz
COMPONENT SIDE
VCC GND
CUT
.325
C9
J3
R10
VCC
R
1
1
C15
CDB
455
C16
J2
AF OUT
C
1
3
C14 R12
MC3372
C8
MC3372
IF 10.7 MHZ
FRONT END
+
GND
C11
CFU455D2
C10
XTAL
10.245
MHZ
J1
C17
INPUT IF
10.7 MHZ
C16
VR2
R8
BNC
C12
CUT
.325
C7 R7
C4
C
5
C1
R9
C2 L2
+
C3
BNC
R13
J4
D1
R6
R5
VR1
R2
J3
R3
L1
R4
C6
R1
CUT
.325
METER
OUT
VCC
Figure 21. MC3372P PC Board Circuit or Solder Side as Viewed through Component Side
SOLDER SIDE
Above PC Board is laid out for the circuit in Figure 12.
MOTOROLA ANALOG IC DEVICE DATA
17
MC3371 MC3372
OUTLINE DIMENSIONS
P SUFFIX
PLASTIC PACKAGE
CASE 648–08
ISSUE R
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
–A–
16
9
1
8
B
F
C
L
S
SEATING
PLANE
–T–
K
H
G
D
M
J
16 PL
0.25 (0.010)
M
T A
M
DIM
A
B
C
D
F
G
H
J
K
L
M
S
INCHES
MIN
MAX
0.740
0.770
0.250
0.270
0.145
0.175
0.015
0.021
0.040
0.70
0.100 BSC
0.050 BSC
0.008
0.015
0.110
0.130
0.295
0.305
0_
10 _
0.020
0.040
MILLIMETERS
MIN
MAX
18.80
19.55
6.35
6.85
3.69
4.44
0.39
0.53
1.02
1.77
2.54 BSC
1.27 BSC
0.21
0.38
2.80
3.30
7.50
7.74
0_
10 _
0.51
1.01
D SUFFIX
PLASTIC PACKAGE
CASE 751B–05
(SO–16)
ISSUE J
–A–
16
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 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
9
–B–
1
P
8 PL
0.25 (0.010)
8
M
B
S
G
R
K
F
X 45 _
C
–T–
SEATING
PLANE
M
D
16 PL
0.25 (0.010)
18
M
T B
S
A
S
J
DIM
A
B
C
D
F
G
J
K
M
P
R
MILLIMETERS
MIN
MAX
9.80
10.00
3.80
4.00
1.35
1.75
0.35
0.49
0.40
1.25
1.27 BSC
0.19
0.25
0.10
0.25
0_
7_
5.80
6.20
0.25
0.50
INCHES
MIN
MAX
0.386
0.393
0.150
0.157
0.054
0.068
0.014
0.019
0.016
0.049
0.050 BSC
0.008
0.009
0.004
0.009
0_
7_
0.229
0.244
0.010
0.019
MOTOROLA ANALOG IC DEVICE DATA
MC3371 MC3372
OUTLINE DIMENSIONS
DTB SUFFIX
PLASTIC PACKAGE
CASE 948F–01
(TSSOP–16)
ISSUE O
16X K REF
0.10 (0.004)
0.15 (0.006) T U
M
T U
V
S
S
S
K
ÉÉÉ
ÇÇÇ
ÇÇÇ
ÉÉÉ
ÇÇÇ
K1
2X
L/2
16
9
J1
B
–U–
L
SECTION N–N
J
PIN 1
IDENT.
8
1
N
0.25 (0.010)
0.15 (0.006) T U
S
A
–V–
M
NOTES:
1 DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2 CONTROLLING DIMENSION: MILLIMETER.
3 DIMENSION A DOES NOT INCLUDE MOLD FLASH.
PROTRUSIONS OR GATE BURRS. MOLD FLASH
OR GATE BURRS SHALL NOT EXCEED 0.15
(0.006) PER SIDE.
4 DIMENSION B DOES NOT INCLUDE INTERLEAD
FLASH OR PROTRUSION. INTERLEAD FLASH OR
PROTRUSION SHALL NOT EXCEED
0.25 (0.010) PER SIDE.
5 DIMENSION K DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN
EXCESS OF THE K DIMENSION AT MAXIMUM
MATERIAL CONDITION.
6 TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
7 DIMENSION A AND B ARE TO BE DETERMINED
AT DATUM PLANE –W–.
N
F
DETAIL E
–W–
C
0.10 (0.004)
–T– SEATING
PLANE
H
D
MOTOROLA ANALOG IC DEVICE DATA
DETAIL E
DIM
A
B
C
D
F
G
H
J
J1
K
K1
L
M
MILLIMETERS
MIN
MAX
4.90
5.10
4.30
4.50
–––
1.20
0.05
0.15
0.50
0.75
0.65 BSC
0.18
0.28
0.09
0.20
0.09
0.16
0.19
0.30
0.19
0.25
6.40 BSC
0_
8_
INCHES
MIN
MAX
0.193
0.200
0.169
0.177
–––
0.047
0.002
0.006
0.020
0.030
0.026 BSC
0.007
0.011
0.004
0.008
0.004
0.006
0.007
0.012
0.007
0.010
0.252 BSC
0_
8_
G
19
MC3371 MC3372
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.
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INTERNET: http://motorola.com/sps
20
◊
MOTOROLA ANALOG IC DEVICE
DATA
MC3371/D