· MC3371 MC3372 4 MOTOROLA ANALOG IC DEVICE DATA 15 22 0.33 0.001 57.6575 MHz Oscillator C15 0.1...

DeviceOperating

Temperature Range Package

LOW POWERFM IF

MC3371D

MC3371DTB

TA = –30° to +70°C

SO–16

TSSOP–16

D SUFFIXPLASTIC PACKAGE

CASE 751B(SO–16)

P SUFFIXPLASTIC PACKAGE

CASE 648

MC3371P

MC3372DTB

Plastic DIP

TSSOP–16

Order this document by MC3371/D

MC3372P Plastic DIP

16

1

161

DTB SUFFIXPLASTIC PACKAGE

CASE 948F(TSSOP–16)

16

1

MC3372D SO–16

ORDERING INFORMATION

1MOTOROLA ANALOG IC DEVICE DATA

The MC3371 and MC3372 perform single conversion FM reception andconsist of an oscillator, mixer, limiting IF amplifier, quadrature discriminator,active filter, squelch switch, and meter drive circuitry. These devices aredesigned for use in FM dual conversion communication equipment. TheMC3371/MC3372 are similar to the MC3361/MC3357 FM IFs, except that asignal strength indicator replaces the scan function controlling driver which isin the MC3361/MC3357. The MC3371 is designed for the use of parallel LCcomponents, while the MC3372 is designed for use with either a 455 kHzceramic discriminator, or parallel LC components.

These devices also require fewer external parts than earlier products. TheMC3371 and MC3372 are available in dual–in–line and surface mountpackaging.

• Wide Operating Supply Voltage Range: VCC = 2.0 to 9.0 V

• Input Limiting Voltage Sensitivity of –3.0 dB

• Low Drain Current: ICC = 3.2 mA, @ VCC = 4.0 V, Squelch Off

• Minimal Drain Current Increase When Squelched

• Signal Strength Indicator: 60 dB Dynamic Range

• Mixer Operating Frequency Up to 100 MHz

• Fewer External Parts Required than Earlier Devices

MAXIMUM RATINGSRating Pin Symbol Value Unit

Power Supply Voltage 4 VCC(max) 10 Vdc

RF Input Voltage (VCC 4.0 Vdc) 16 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 V14 –0.7 to 10 Vpk

Mute Sink Current 14 l14 50 mA

Junction Temperature – TJ 150 °C

Storage Temperature Range – Tstg –65 to +150 °CNOTES: 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.

8

PIN CONNECTIONS

11

Gnd

Mute

Crystal Osc

Meter Drive

Squelch Input

Recovered Audio

Mixer Input

Filter Output

8

Mixer Output

Decoupling

Quad Coil

VCC MC3371(Top View)

3

2

4

5

6

Limiter Input

107

161

15

14

13

12

9

Filter Input

Decoupling

Limiter Output

11

Gnd

Mute

Crystal Osc

Meter Drive

Squelch Input

Recovered Audio

Mixer Input

Filter Output

Mixer Output

Quad Input

VCC MC3372(Top View)

3

2

4

5

6

Limiter Input

107

161

15

14

13

12

9

Filter Input

Motorola, Inc. 1996 Rev 1

MC3371 MC3372

2 MOTOROLA ANALOG IC DEVICE DATA

RECOMMENDED OPERATING CONDITIONSRating Pin Symbol Value Unit

Supply Voltage (@ TA = 25°C)( –30°C TA +75°C)

4 VCC 2.0 to 9.02.4 to 9.0

Vdc

RF Input Voltage 16 Vrf 0.0005 to 10 mVrms

RF Input Frequency 16 frf 0.1 to 100 MHz

Oscillator Input Voltage 1 Vlocal 80 to 400 mVrms

Intermediate Frequency – fif 455 kHz

Limiter Amp Input Voltage 5 Vif 0 to 400 mVrms

Filter Amp Input Voltage 10 Vfa 0.1 to 300 mVrms

Squelch Input Voltage 12 Vsq 0 or 2 Vdc

Mute Sink Current 14 lsq 0.1 to 30 mA

Ambient Temperature Range – TA –30 to +70 °C

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 Min Typ Max Unit

Input for 12 dB SINADMatched Input – (See Figures 11, 12 and 13)Unmatched Input – (See Figures 1 and 2)

– VSIN––

1.05.0

–15

µVrms

Input for 20 dB NQS – VNQS – 3.5 – µVrms

Recovered Audio Output VoltageVrf = –30 dBm

– AFO120 200 320

mVrms

Recovered Audio Drop Voltage LossVrf = –30 dBm, VCC = 4.0 V to 2.0 V

– AFloss–8.0 –1.5 –

dB

Meter Drive Output Voltage (No Modulation)Vrf = –100 dBmVrf = –70 dBmVrf = –40 dBm

13 MDrvMV1MV2MV3

–1.12.0

0.31.52.5

0.51.93.1

Vdc

Filter Amp GainRs = 600 Ω , fs = 10 kHz, Vfa = 1.0 mVrms

– AV(Amp)47 50 –

dB

Mixer Conversion GainVrf = –40 dBm, RL = 1.8 kΩ

– AV(Mix)14 20 –

dB

Signal to Noise RatioVrf = –30 dBm

– s/n36 67 –

dB

Total Harmonic DistortionVrf = –30 dBm, BW = 400 Hz to 30 kHz

– THD– 0.6 3.4

%

Detector Output Impedance 9 ZO – 450 – Ω

Detector Output Voltage (No Modulation)Vrf = –30 dBm

9 DVO– 1.45 –

Vdc

Meter DriveVrf = –100 to –40 dBm

13 MO– 0.8 –

µA/dB

Meter Drive Dynamic RangeRFInIFIn (455 kHz)

13 MVD––

6080

––

dB

Mixer Third Order Input Intercept Pointf1 = 58.125 MHzf2 = 58.1375 MHz

– ITOMix

– –22 –

dBm

Mixer Input Resistance 16 Rin – 3.3 – kΩ

Mixer Input Capacitance 16 Cin – 2.2 – pF

MC3371 MC3372


DC ELECTRICAL CHARACTERISTICS (VCC = 4.0 Vdc, TA = 25°C, unless otherwise noted)

Characteristic Pin Symbol Min Typ Max Unit

Drain Current (No Input Signal)Squelch Off, Vsq = 2.0 VdcSquelch On, Vsq = 0 VdcSquelch Off, VCC = 2.0 to 9.0 V

4lcc1lcc2dlcc1

–––

3.23.61.0

4.24.82.0

mA

Detector Output (No Input Signal)DC Voltage, V8 = VCC

9 V90.9 1.6 2.3

Vdc

Filter Output (No Input Signal)DC VoltageVoltage Change, VCC = 2.0 to 9.0 V

11V11dV11

1.52.0

2.55.0

3.58.0

Vdc

Trigger Hysteresis – Hys 34 57 80 mV

Quad Coil TOKO2A6597 HK (10 mm)or

7MC–8128Z (7 mm)

15

22 0.33

0.001

57.6575MHz

Oscillator

0.1 0.1

20 k

0.1muRata

CFU455D2or

equivalent

14

C10.01 51

51 k

RF Input

VCC = 4.0 Vdc

13

2 43 8

–

5 6 71

15

+

16

Mute

0.1

12 11 10 9

FilterOut

1.0 µF

Demodulator

AFAmp

RSSI Output

510 k

SqIn

FilterIn

470

8.2 k0.01

AF Outto AudioPower Amp

53 k

10

LimiterAmp

FilterAmp

Mixer

Squelch Triggerwith Hysteresis

Figure 1. MC3371 Functional Block Diagram and Test Fixture Schematic

1.8 k

51 k

1.0 µF

MC3371 MC3372


15

22 0.33

0.001

57.6575MHz

Oscillator

C150.1

CeramicResonator

muRataCFU455D2

orequivalent

14

C10.01 51

51 k

RF Input

VCC = 4.0 Vdc

13

2 43 8

–

5 6 71

15

+

16

Mute

0.1

12 11 10 9

FilterOut

1.0 µF

Demodulator

AFAmp

RSSI Output

510 k

SqIn

FilterIn

470

8.2 k0.01


53 k

LimiterAmp

FilterAmp

Mixer


C1427R10

1.8 k

R1151 k

C120.1

C130.1

R124.3 k

muRataCDB455C16

Figure 2. MC3372 Functional Block Diagram and Test Fixture Schematic

1.0 µF

10

MC3371 MC3372


Figure 3. Total Harmonic Distortionversus Temperature

–550

125

20

TA, AMBIENT TEMPERATURE (°C)

5.0 25 45

30

–140

10

40

50

60

–10065 –80 –40–120 –20 0–60 20

TA = –30°C

TA = 25°C

10585

705.0

0

1.0

4.0

3.0

2.0

–35 –15

TA = 75°C

TA = 75°C

TA = –30°C

VCC = 4.0 Vdcfo = 10.7 MHz

RF INPUT (dBm)

THD

, TO

TAL

HAR

MO

NIC

DIS

TORT

ION

(%)

RSS

I OU

T(

A)

µ

Figure 4. RSSI versus RF Input

VCC = 4.0 VdcRF Input = –30 dBmfo = 10.7 MHz

TYPICAL CURVES (Unmatched Input)

RSS

I OU

TPU

T(

A)

µ

–30 dBm

45 6525–35 –15

–70 dBm

TA, AMBIENT TEMPERATURE (°C)

5.0 105–55 12585

VCC = 4.0 Vdcfo = 10.7 MHz

–110 dBm

–20

–10

VCC = 4.0 VdcTA = 27°C

100 MHz3rd Order Products

–50

–60

–40

–30

–70– 20 0 10– 50 – 10– 30– 40– 70

RF INPUT (dBm)

– 60

0

100 MHzDesired Products

MIX

ER O

UTP

UT

(dBm

)

30

18

60

TA = –30°C TA = 25°C

fo = 10.7 MHzRFin –40 dBm1.8 kΩ Load

TA = 75°C

48

54

6.0

42

36

0

24

18

12

6.0

9.0

12

8.0 9.0

21

–5.0 dBm

0 dBm10

–15 dBm

1.0

–20 dBm

–10 dBm

5.0 dBm

40

f, FREQUENCY (MHz)

30

20

010010 1000107.06.05.03.0 4.0

VCC, SUPPLY VOLTAGE (V)

1.0 2.0

30

27

24

0

15

3.0

0

RSS

I OU

TPU

T(

A)

µ

MIX

ER G

AIN

(dB)

Figure 5. RSSI Output versus Temperature Figure 6. Mixer Output versus RF Input

Figure 7. Mixer Gain versus Supply Voltage Figure 8. Mixer Gain versus Frequency

VCC = 4.0 VdcTA = 27°CRFin = –40 dBm

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 SymbolInternal Equivalent

Circuit Description Waveform

1 OSC1

OSC12

VCC

1 15 k

The base of the Colpitts oscillator. Usea high impedance and low capacitanceprobe or a “sniffer” to view the wave–form without altering the frequency. Typical level is 450 mVpp.

2 OSC2

200µA

2OSC2

The emitter of the Colpitts oscillator.Typical signal level is 200 mVpp. Notethat the signal is somewhat distortedcompared to that on Pin 1.

3 MXOut

34 MixerOutVCC

1.5 k

Output of the Mixer. Riding on the 455 kHz is the RF carrier component.The typical level is approximately 60 mVpp.

4 VCC

100µA

1.5 kSupply Voltage –2.0 to 9.0 Vdc is theoperating range. VCC is decoupled toground.

5 IFIn

1.8 k

7 51 kDEC2

53 k

5IFIn

6DEC1

Input to the IF amplifier after passingthrough the 455 kHz ceramic filter. Thesignal is attenuated by the filter. Thetypical level is approximately 50 mVpp.

67

DEC1DEC2

DEC2

60 µA

IF Decoupling. External 0.1 µFcapacitors connected to VCC.

8 QuadCoil

10

VCC

8Quad Coil

50 µA

Quadrature Tuning Coil. Composite(not yet demodulated) 455 kHz IFsignal is present. The typical level is500 mVpp.

MC3371 MC3372


MC3371 PIN FUNCTION DESCRIPTION (continued)


Pin WaveformDescriptionInternal Equivalent

CircuitSymbol

9 RA

RAO t200

VCC

Recovered Audio. This is a compositeFM demodulated output having signaland carrier component. The typicallevel is 1.4 Vpp.

RAOut9

100 µA

The filtered recovered audio has thecarrier component removed and istypically 800 mVpp.

10 FilIn

VCC

10FilterIn

30 µA

Filter Amplifier Input

11 FilOut

11

VCC

FilterOut

240 µA

Filter Amplifier Output. The typicalsignal level is 400 mVpp.

12 SqIn

SqIn

12

12 µA

Squelch Input. See discussion inapplication text.

MC3371 MC3372


MC3371 PIN FUNCTION DESCRIPTION (continued)


Pin WaveformDescriptionInternal Equivalent

CircuitSymbol

13 RSSI

RSSIOut

1.8 k

Bias13

VCCRSSI Output. Referred to as theReceived Signal Strength Indicator orRSSI. The chip sources up to 60 µAover the linear 60 dB range. This pinmay be used many ways, such as:AGC, meter drive and carrier triggeredsquelch circuit.

14 MUTE

40 k

Mute orSqOut

14Mute Output. See discussion inapplication text.

15 Gnd

Gnd 15

Ground. The ground area should becontinuous and unbroken. In a two–sided layout, the component side hasthe ground plane. In a one–sidedlayout, the ground plane fills aroundthe traces on the circuit side of theboard and is not interrupted.

16 MIXIn

MixerIn

VCC

16

3.3 k10 k

Mixer Input –Series Input Impedance:@ 10 MHz: 309 – j33 Ω@ 45 MHz: 200 – j13 Ω

*Other pins are the same as pins in MC3371.

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 SymbolInternal Equivalent

Circuit Description Waveform

5 IFIn

IFIn5

53 k6

IF Amplifier Input

6 DEC153 k6

DEC

60 µA

IF Decoupling. External 0.1 µFcapacitors connected to VCC.

7 IFOut

IFOut7

120 µA

VCC

50 µA

IF Amplifier Output Signal level istypically 300 mVpp.

8 QuadIn

QuadIn8

50 µA

VCC

10

Quadrature Detector Input. Signal level is typically 150 mVpp.

9 RA

9200RAOut

VCC

Recovered Audio. This is a compositeFM demodulated output having signaland carrier components. Typical levelis 800 mVpp.

RAOut

100 µAThe filtered recovered audio has thecarrier signal removed and is typically500 mVpp.

MC3371 MC3372


Figure 9. MC3371 Circuit Schematic

Figure 10. MC3372 Circuit Schematic

100µA

IFOut

8QuadIn

4VCC

5

1.8 kIFIn

DEC153 k

51 k

X

200 9RAOut

100 µA

Squelch Out+FilterOut

Bias

12 Squelch In

11

MixerOut3

Bias

XYX

OSC1

200 µA

2

1

16

14

15Gnd

10FilterIn

–

Meter Out13

OSC2

VCC

4

YY

DEC27

MixerIn

6

X

100µA

Squelch Out+FilterOut

Bias

12 Squelch In

11

MixerOut3

Bias

XY

X

OSC1

200 µA

2

1

16

14

15Gnd

10FilterIn

–

Meter Out13

OSC2

VCC4 MixerIn

8QuadIn

4VCC

5IFIn

DEC53 k

X200 9

RAOut

100 µA

YY

7

6

X

10

10

MC3371 MC3372


CIRCUIT DESCRIPTION

The MC3371 and MC3372 are low power narrowband FMreceivers with an operating frequency of up to 60 MHz. Its lowvoltage design provides low power drain, excellentsensitivity, and good image rejection in narrowband voiceand data link applications.

This part combines a mixer, an IF (intermediate frequency)limiter with a logarithmic response signal strength indicator, aquadrature detector, an active filter and a squelch triggercircuit. In a typical application, the mixer amplifier converts anRF input signal to a 455 kHz IF signal. Passing through anexternal bandpass filter, the IF signal is fed into a limitingamplifier and detection circuit where the audio signal isrecovered. A conventional quadrature detector is used.

The absence of an input signal is indicated by thepresence of noise above the desired audio frequencies. This“noise band” is monitored by an active filter and a detector. Asquelch switch is used to mute the audio when noise or atone is present. The input signal level is monitored by a meterdrive circuit which detects the amount of IF signal in thelimiting amplifier.

APPLICATIONS INFORMATION

The oscillator is an internally biased Colpitts type with thecollector, base, and emitter connections at Pins 4, 1 and 2respectively. This oscillator can be run under crystal control.For fundamental mode crystals use crystal characterizedparallel resonant for 32 pF load. For higher frequencies, use3rd overtone series mode type crystals. The coil (L2) andresistor RD (R13) are needed to ensure proper and stableoperation at the LO frequency (see Figure 13, 45 MHzapplication circuit).

The mixer is doubly balanced to reduce spurious radiation.Conversion gain stated in the AC Electrical Characteristicstable is typically 20 dB. This power gain measurement wasmade under stable conditions using a 50 Ω source at theinput and an external load provided by a 455 kHz ceramicfilter at the mixer output which is connected to the VCC (Pin 4)and IF input (Pin 5). The filter impedance closely matches the1.8 kΩ internal load resistance at Pin 3 (mixer output). Sincethe input impedance at Pin 16 is strongly influenced by a3.3 kΩ internal biasing resistor and has a low capacitance,the useful gain is actually much higher than shown by thestandard power gain measurement. The Smith Chart plot inFigure 17 shows the measured mixer input impedanceversus input frequency with the mixer input matched to a50 Ω source impedance at the given frequencies. In order toassure stable operation under matched conditions, it isnecessary to provide a shunt resistor to ground. Figures 11,12 and 13 show the input networks used to derive the mixerinput impedance data.

Following the mixer, a ceramic bandpass filter isrecommended for IF filtering (i.e. 455 kHz types having abandwidth of ±2.0 kHz to ±15 kHz with an input and outputimpedance from 1.5 kΩ to 2.0 kΩ). The 6 stage limiting IF

amplifier has approximately 92 dB of gain. The MC3371 andMC3372 are different in the limiter and quadrature detectorcircuits. The MC3371 has a 1.8 kΩ and a 51 kΩ resistorproviding internal dc biasing and the output of the limiter isinternally connected, both directly and through a 10 pFcapacitor to the quadrature detector; whereas, in theMC3372 these components are not provided internally. Thus,in the MC3371, no external components are necessary tomatch the 455 kHz ceramic filter, while in the MC3372,external 1.8 kΩ and 51 kΩ biasing resistors are neededbetween Pins 5 and 7, respectively (see Figures 12 and 13).

In the MC3371, a parallel LCR quadrature tank circuit isconnected externally from Pin 8 to VCC (similar to theMC3361). In the MC3372, a quadrature capacitor is neededexternally from Pin 7 to Pin 8 and a parallel LC or a ceramicdiscriminator with a damping resistor is also needed fromPin 8 to VCC (similar to the MC3357). The above externalquadrature circuitry provides 90° phase shift at the IF centerfrequency and enables recovered audio.

The damping resistor determines the peak separation ofthe detector and is somewhat critical. As the resistor isdecreased, the separation and the bandwidth is increasedbut the recovered audio is decreased. Receiver sensitivity isdependent on the value of this resistor and the bandwidth ofthe 455 kHz ceramic filter.

On the chip the composite recovered audio, consisting ofcarrier component and modulating signal, is passed througha low pass filter amplifier to reduce the carrier componentand then is fed to Pin 9 which has an output impedance of450 Ω . The signal still requires further filtering to eliminatethe carrier component, deemphasis, volume control, andfurther amplification before driving a loudspeaker. Therelative level of the composite recovered audio signal at Pin 9should be considered for proper interaction with an audiopost amplifier and a given load element. The MC13060 isrecommended as a low power audio amplifier.

The meter output indicates the strength of the IF level andthe output current is proportional to the logarithm of the IFinput signal amplitude. A maximum source current of 60 µA isavailable and can be used to drive a meter and to detect acarrier presence. This is referred to as a Received StrengthSignal Indicator (RSSI). The output at Pin 13 provides acurrent source. Thus, a resistor to ground yields a voltageproportional to the input carrier signal level. The value of thisresistor is estimated by (VCC(Vdc) – 1.0 V)/60 µA; so forVCC = 4.0 Vdc, the resistor is approximately 50 kΩ andprovides a maximum voltage swing of about 3.0 V.

A simple inverting op amp has an output at Pin 11 and theinverting input at Pin 10. The noninverting input is connectedto 2.5 V. The op amp may be used as a noise triggeredsquelch or as an active noise filter. The bandpass filter isdesigned with external impedance elements to discriminatebetween frequencies. With an external AM detector, thefiltered audio signal is checked for a tone signal or for thepresence of noise above the normal audio band. Thisinformation is applied to Pin 12.

MC3371 MC3372


An external positive bias to Pin 12 sets up the squelchtrigger circuit such that the audio mute (Pin 14) is open orconnected to ground. If Pin 12 is pulled down to 0.9 V orbelow by the noise or tone detector, Pin 14 is internallyshorted to ground. There is about 57 mV of hyteresis atPin 12 to prevent jitter. Audio muting is accomplished byconnecting Pin 14 to the appropriate point in the audio pathbetween Pin 9 and an audio amplifier. The voltage at Pin 14should not be lower than –0.7 V; this can be assured byconnecting Pin 14 to the point that has no dc component.

Another possible application of the squelch switch maybe as a carrier level triggered squelch circuit, similar to theMC3362/MC3363 FM receivers. In this case the meteroutput can be used directly to trigger the squelch switchwhen the RF input at the input frequency falls below thedesired level. The level at which this occurs is determinedby the resistor placed between the meter drive output(Pin 13) and ground (Pin 15).

Figure 11. Typical Application for MC3371 at 10.7 MHz

–10

C70.022

VR1 (Squelch Control)10 k

VR210 k


3.3 k

R8

C10

6810.245MHz

L1TKANS9443HM6.8 µH ±6%

D1

+

1N5817 R5

R64.7 k

560

R7

R9

4.7 k

510 k

1053 k51 k

+

8.2 µHL2

1st IF 10.7 MHzfrom InputFront End+

T2: Toko2A6597 HK (10 mm)or7MC–8128Z (7 mm)

VCC = 4.0 Vdc RSSI OutputR2

10 k

C80.22

R11560

C910

R151 kC1

0.01

C170.1

C30.1

C40.001

C50.001

C11220

C130.1 R10

39 k

C140.1

14 131516 12 11 9

2 43 85 6 71Oscillator

muRataCFU455D2

orequivalent

Demodulator

Filter

Mixer


AF

LimiterAmp

1.8 k

C120.1

C24.7µF

C1591

R3100 k

R41.0 k

AmpAmp

MC3371 MC3372


Figure 12. Typical Application for MC3372 at 10.7 MHz

–10

C70.022


VR210 k


3.3 k

R8

C10

6810.245MHz

L1TKANS9443HM6.8 µH ± 6%

D1

+

1N5817 R5

R64.7 k

560

R7

R9

4.7 k

510 k

53 k

+

8.2 µHL2

1st IF 10.7 MHzfrom InputFront End+

VCC = 4.0 Vdc RSSI OutputR2

10 k

C80.22

R13560

C910

R151 kC1

0.01

C60.1

C30.1

C40.001

C5

C2220

C14

14 131516 12 11 9


muRataCFU455D2

orequivalent

Demodulator

Filter

Mixer


AF

Limiter Amp

C150.1

R101.8k

R1151 k

C120.1

C130.1

R124.3 k

27p muRataCDB455C16

C1691

C24.7µF

R41.0 k

AmpAmp

0.001

10

MC3371 MC3372


2.0

2.5

–20–40–60–80

3.5

3.0

1.5

1.0

0.5

0–120 –100

RSS

I OU

TPU

T (V

dc)

fRF = 10.7 MHzVCC = 4.0 VdcReference Figure 11

Figure 13. Typical Application for MC3372 at 45 MHz

Figure 14. RSSI Output versus RF Input Figure 15. RSSI Output versus RF Input

–

RSSI Outputto Meter (Triplett – 100 kV)

3.5

3.0

muRataCDB455C16

RF INPUT (dBm)

1.5

1.0

0.5

0–120 –100 –80 –60 –40

2.5

–20

2.0

C70.022


VR210 k


3.3 k

R8

L10.245 µHCoilcraft150–07J08

D1

+

1N5817

R64.7 k

560R7

R9

4.7 k

510 k

RF Input45 MHz

+

VCC = 4.0 Vdc R212 k

C80.22

C1875

C910

R1451 k

C10.01

C60.1

C30.1

C40.001

C5

C24.7

R3100 k

R41.0 k

R5

R1470

53 k

14 131516 12 11 10 9


Demodulator

Filter

Mixer


AF

Limiter Amp

C10

30C160.01

C115.0

R101.8 k

R1151 k

R124.3 k

C150.1

muRataCFU455D2

orequivalent

C130.1

C1427C12

0.1

R131.0 k

44.545MHz

Coilcraft143–13J12

L20.84 µH

C17120

RSS

I OU

TPU

T (V

dc)

+

0.001

AmpAmp

fRF = 45 MHzVCC = 4.0 VdcReference Figure 13

10

MC3371 MC3372


Figure 16. S + N, N, AMR versus Input

Figure 17. Mixer Input Impedance versus Frequency

+j10

–j500

–j250

–j150

–j100

–j50

–j25

–j10

+j250

+j25

+j50

+j500

+j150

VCC = 4.0 VdcRF Input = –40 dBm

+j100

010 150 50025025 50

N

–60–70 –10–30–50–90–110

10

0

–10

–130

–50

–40

–30

–20

* Reference Figures 11, 12 and 13

RF INPUT (dBm)

S + N

S + N 30% AM

10.7 MHz45 MHz

S +

N, N

, AM

R (d

B)

100

fRF = 10.7 MHzVCC = 4.0 VTA = 25°C

MC3371 MC3372


Figure 18. MC3371 PC Board Component View with Matched Input at 10.7 MHz

Figure 19. MC3371 PC Board Circuit or Solder Side as Viewed through Component Side

METEROUT

J4

R1

C3R9

D1

C5

R5 R4C17

R3

R6

VR1

VCCJ3

VR2R8

R7C8C7

C1L2C2+

C15

INPUT IF10.7 MHZ

J1

L1MC3371IF 10.7 MHZFRONT END

C14

BNC

J3

XTAL10.245MHZ

C10

C11CFU455D 2VCC

C13

MC3371R10

J2

T2AF OUT

BNC

GNDCUT.325

+C9

VCC

COMPONENT SIDE

R11

C16

C12

GND

R2

C4

Above PC Board is laid out for the circuit in Figure 11.

SOLDER SIDE

CUT.325

CUT.325

MC3371 MC3372


Figure 20. MC3372P PC Board Component View with Matched Input at 10.7 MHz

Figure 21. MC3372P PC Board Circuit or Solder Side as Viewed through Component Side

CDB455C16

CFU455D2INPUT IF10.7 MHZ

C15J3

C10

C11VCC

AF OUT

GNDCUT.325

+C9

VCC

COMPONENT SIDE

C12

GNDCUT.325

R10

R11

C13

METEROUT

J4

R1

C3

R9

D1R5 R4 C6

R3

R6

VR1

VCCJ3

VR2

R8

R7C8

C7

C1C2

+

C16

J1

L1

MC3372IF 10.7 MHZFRONT END

BNC

XTAL10.245MHZ

MC3372R12

J2

BNC

R13

C17

R2

C4CUT.325

C5

L2

C14

Above PC Board is laid out for the circuit in Figure 12.

SOLDER SIDE

MC3371 MC3372


OUTLINE DIMENSIONS

D SUFFIXPLASTIC PACKAGE

CASE 751B–05(SO–16)ISSUE J

P SUFFIXPLASTIC PACKAGE

CASE 648–08ISSUE 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–

B

F C

S

HG

D

J

L

M

16 PL

SEATING

1 8

916

K

PLANE–T–

MAM0.25 (0.010) T

DIM MIN MAX MIN MAXMILLIMETERSINCHES

A 0.740 0.770 18.80 19.55B 0.250 0.270 6.35 6.85C 0.145 0.175 3.69 4.44D 0.015 0.021 0.39 0.53F 0.040 0.70 1.02 1.77G 0.100 BSC 2.54 BSCH 0.050 BSC 1.27 BSCJ 0.008 0.015 0.21 0.38K 0.110 0.130 2.80 3.30L 0.295 0.305 7.50 7.74M 0 10 0 10 S 0.020 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 DAMBARPROTRUSION SHALL BE 0.127 (0.005) TOTALIN EXCESS OF THE D DIMENSION ATMAXIMUM MATERIAL CONDITION.

1 8

16 9

SEATINGPLANE

F

JM

R X 45

G

8 PLP–B–

–A–

M0.25 (0.010) B S

–T–

D

K

C

16 PL

SBM0.25 (0.010) A ST

DIM MIN MAX MIN MAXINCHESMILLIMETERS

A 9.80 10.00 0.386 0.393B 3.80 4.00 0.150 0.157C 1.35 1.75 0.054 0.068D 0.35 0.49 0.014 0.019F 0.40 1.25 0.016 0.049G 1.27 BSC 0.050 BSCJ 0.19 0.25 0.008 0.009K 0.10 0.25 0.004 0.009M 0 7 0 7 P 5.80 6.20 0.229 0.244R 0.25 0.50 0.010 0.019

MC3371 MC3372


OUTLINE DIMENSIONS

DTB SUFFIXPLASTIC PACKAGE

CASE 948F–01(TSSOP–16)

ISSUE O

ÇÇÇÇÇÇÇÇÇ

DIM MIN MAX MIN MAXINCHESMILLIMETERS

A 4.90 5.10 0.193 0.200B 4.30 4.50 0.169 0.177C ––– 1.20 ––– 0.047D 0.05 0.15 0.002 0.006F 0.50 0.75 0.020 0.030G 0.65 BSC 0.026 BSCH 0.18 0.28 0.007 0.011J 0.09 0.20 0.004 0.008J1 0.09 0.16 0.004 0.006K 0.19 0.30 0.007 0.012K1 0.19 0.25 0.007 0.010L 6.40 BSC 0.252 BSCM 0 8 0 8

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 FLASHOR GATE BURRS SHALL NOT EXCEED 0.15(0.006) PER SIDE.

4 DIMENSION B DOES NOT INCLUDE INTERLEADFLASH OR PROTRUSION. INTERLEAD FLASH ORPROTRUSION SHALL NOT EXCEED0.25 (0.010) PER SIDE.

5 DIMENSION K DOES NOT INCLUDE DAMBARPROTRUSION. ALLOWABLE DAMBARPROTRUSION SHALL BE 0.08 (0.003) TOTAL INEXCESS OF THE K DIMENSION AT MAXIMUMMATERIAL CONDITION.

6 TERMINAL NUMBERS ARE SHOWN FORREFERENCE ONLY.

7 DIMENSION A AND B ARE TO BE DETERMINEDAT DATUM PLANE –W–.

SECTION N–N

SEATINGPLANE

IDENT.PIN 1

1 8

16 9

DETAIL E

J

J1

B

C

D

A

K

K1

HG

ÉÉÉÉÉÉ

DETAIL E

F

M

L

2X L/2

–U–

SU0.15 (0.006) T

SU0.15 (0.006) T

SUM0.10 (0.004) V ST

0.10 (0.004)–T–

–V–

–W–

0.25 (0.010)

16X REFK

N

N

MC3371 MC3372


Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regardingthe 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, andspecifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motoroladata 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 ofothers. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or otherapplications 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 injuryor death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorolaand its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney feesarising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges thatMotorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an EqualOpportunity/Affirmative Action Employer.

Mfax is a trademark of Motorola, Inc.How to reach us:USA/EUROPE/Locations Not Listed : Motorola Literature Distribution; JAPAN : Nippon Motorola Ltd.: SPD, Strategic Planning Office, 4–32–1,P.O. Box 5405, Denver, Colorado 80217. 303–675–2140 or 1–800–441–2447 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

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