Motorola MC3372D, MC3372DTB, MC3372P, MC3371DTB, MC3371P Datasheet

Device

Operating

Temperature Range

Package





LOW POWER

FM IF

MC3371D

MC3371DTB

T

A

= –30° to +70°C

SO–16

TSSOP–16

D SUFFIX

PLASTIC PACKAGE

CASE 751B

(SO–16)

P SUFFIX

PLASTIC PACKAGE

CASE 648

MC3371P

MC3372DTB

Plastic DIP

TSSOP–16

Order this document by MC3371/D

MC3372P

Plastic DIP

16

1

16

1

DTB SUFFIX

PLASTIC PACKAGE

CASE 948F

(TSSOP–16)

16

1

MC3372D SO–16

ORDERING INFORMATION

1

MOTOROLA ANALOG IC DEVICE DATA

 

  

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: V

CC

= 2.0 to 9.0 V

• Input Limiting Voltage Sensitivity of –3.0 dB

• Low Drain Current: I

CC

= 3.2 mA, @ V

CC

= 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 RATINGS

Rating Pin Symbol Value Unit

Power Supply Voltage 4 V

CC

(max) 10 Vdc

RF Input Voltage (V

CC

q

4.0 Vdc) 16 V16 1.0 Vrms

Detector Input Voltage 8 V8 1.0 Vpp

Squelch Input Voltage

(V

CC

q

4.0 Vdc)

12 V12 6.0 Vdc

Mute Function 14 V

14

–0.7 to 10 V

pk

Mute Sink Current 14 l14 50 mA

Junction Temperature – T

J

150 °C

Storage Temperature Range – T

stg

–65 to +150 °C

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.

8

PIN CONNECTIONS

11

Gnd

Mute

Crystal Osc

Meter Drive

Squelch Input

Recovered Audio

Mixer Input

Filter Output

8

Mixer Output

Decoupling

Quad Coil

V

CC

MC3371

(Top View)

3

2

4

5

6

Limiter Input

10

7

16

1

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

V

CC

MC3372

(Top View)

3

2

4

5

6

Limiter Input

10

7

16

1

15

14

13

12

9

Filter Input

 Motorola, Inc. 1996 Rev 1

MC3371 MC3372

2

MOTOROLA ANALOG IC DEVICE DATA

RECOMMENDED OPERATING CONDITIONS

Rating Pin Symbol Value Unit

Supply Voltage (@ T

A

= 25°C)

( –30°C

p

T

A

p

+75°C)

4 V

CC

2.0 to 9.0

2.4 to 9.0

Vdc

RF Input Voltage 16 V

rf

0.0005 to 10 mVrms

RF Input Frequency 16 f

rf

0.1 to 100 MHz

Oscillator Input Voltage 1 V

local

80 to 400 mVrms

Intermediate Frequency – f

if

455 kHz

Limiter Amp Input Voltage 5 V

if

0 to 400 mVrms

Filter Amp Input Voltage 10 V

fa

0.1 to 300 mVrms

Squelch Input Voltage 12 V

sq

0 or 2 Vdc

Mute Sink Current 14 l

sq

0.1 to 30 mA

Ambient Temperature Range – T

A

–30 to +70 °C

AC ELECTRICAL CHARACTERISTICS (V

CC

= 4.0 Vdc, f

o

= 58.1125 MHz, df = ±3.0 kHz, f

mod

= 1.0 kHz, 50 Ω source,

f

local

= 57.6575 MHz, V

local

= 0 dBm, T

A

= 25°C, unless otherwise noted)

Characteristic

Pin Symbol Min Typ Max Unit

Input for 12 dB SINAD

Matched Input – (See Figures

11, 12 and 13)

Unmatched Input – (See Figures 1 and 2)

– V

SIN

–

–

1.0

5.0

–

15

µVrms

Input for 20 dB NQS – V

NQS

– 3.5 – µVrms

Recovered Audio Output Voltage

V

rf

= –30 dBm

– AF

O

120 200 320

mVrms

Recovered Audio Drop Voltage Loss

Vrf = –30 dBm, V

CC

= 4.0 V to 2.0 V

– AF

loss

–8.0 –1.5 –

dB

Meter Drive Output Voltage (No Modulation)

V

rf

= –100 dBm

V

rf

= –70 dBm

V

rf

= –40 dBm

13 M

Drv

MV1

MV2

MV3

–

1.1

2.0

0.3

1.5

2.5

0.5

1.9

3.1

Vdc

Filter Amp Gain

R

s

= 600 Ω , f

s

= 10 kHz, V

fa

= 1.0 mVrms

– A

V(Amp)

47 50 –

dB

Mixer Conversion Gain

V

rf

= –40 dBm, R

L

= 1.8 kΩ

– A

V(Mix)

14 20 –

dB

Signal to Noise Ratio

V

rf

= –30 dBm

– s/n

36 67 –

dB

Total Harmonic Distortion

V

rf

= –30 dBm, BW = 400 Hz to 30 kHz

– THD

– 0.6 3.4

%

Detector Output Impedance 9 Z

O

– 450 – Ω

Detector Output Voltage (No Modulation)

V

rf

= –30 dBm

9 DV

O

– 1.45 –

Vdc

Meter Drive

V

rf

= –100 to –40 dBm

13 M

O

– 0.8 –

µA/dB

Meter Drive Dynamic Range

RF

In

IF

In

(455 kHz)

13 MVD

–

–

60

80

–

–

dB

Mixer Third Order Input Intercept Point

f1 = 58.125 MHz

f2 = 58.1375 MHz

– ITO

Mix

– –22 –

dBm

Mixer Input Resistance 16 R

in

– 3.3 – kΩ

Mixer Input Capacitance 16 C

in

– 2.2 – pF

MC3371 MC3372

3

MOTOROLA ANALOG IC DEVICE DATA

DC ELECTRICAL CHARACTERISTICS (V

CC

= 4.0 Vdc, T

A

= 25°C, unless otherwise noted)

Characteristic Pin Symbol Min Typ Max Unit

Drain Current (No Input Signal)

Squelch Off, V

sq

= 2.0 Vdc

Squelch On, V

sq

= 0 Vdc

Squelch Off, V

CC

= 2.0 to 9.0 V

4

lcc1

lcc2

dlcc1

–

–

–

3.2

3.6

1.0

4.2

4.8

2.0

mA

Detector Output (No Input Signal)

DC Voltage, V8 = V

CC

9 V9

0.9 1.6 2.3

Vdc

Filter Output (No Input Signal)

DC Voltage

Voltage Change, V

CC

= 2.0 to 9.0 V

11

V11

dV11

1.5

2.0

2.5

5.0

3.5

8.0

Vdc

Trigger Hysteresis – Hys 34 57 80 mV

Quad Coil TOKO

2A6597 HK (10 mm)

or

7MC–8128Z (7 mm)

15

22

0.33

0.001

57.6575

MHz

Oscillator

0.1 0.1

20 k

0.1

muRata

CFU455D2

or

equivalent

14

C1

0.01

51

51 k

RF Input

V

CC

= 4.0 Vdc

13

2438

–

5671

15

+

16

Mute

0.1

12 11 10 9

Filter

Out

1.0

µ

F

Demodulator

AF

Amp

RSSI Output

510 k

Sq

In

Filter

In

470

8.2 k

0.01

AF Out

to Audio

Power Amp

53 k

10

Limiter

Amp

Filter

Amp

Mixer

Squelch Trigger

with Hysteresis

Figure 1. MC3371 Functional Block Diagram and Test Fixture Schematic

1.8 k

51 k

1.0

µ

F

MC3371 MC3372

4

MOTOROLA ANALOG IC DEVICE DATA

15

22

0.33

0.001

57.6575

MHz

Oscillator

C15

0.1

Ceramic

Resonator

muRata

CFU455D2

or

equivalent

14

C1

0.01

51

51 k

RF Input

V

CC

= 4.0 Vdc

13

2438

–

5671

15

+

16

Mute

0.1

12 11 10 9

Filter

Out

1.0

µ

F

Demodulator

AF

Amp

RSSI Output

510 k

Sq

In

Filter

In

470

8.2 k

0.01

AF Out

to Audio

Power Amp

53 k

Limiter

Amp

Filter

Amp

Mixer

Squelch Trigger

with Hysteresis

C14

27

R10

1.8 k

R11

51 k

C12

0.1

C13

0.1

R12

4.3 k

muRata

CDB455C16

Figure 2. MC3372 Functional Block Diagram and Test Fixture Schematic

1.0

µ

F

10

MC3371 MC3372

5

MOTOROLA ANALOG IC DEVICE DATA

Figure 3. Total Harmonic Distortion

versus Temperature

–55

0

125

20

T

A

, AMBIENT TEMPERATURE (

°

C)

5.0 25 45

30

–140

10

40

50

60

–100

65

–80 –40–120 –20 0–60 20

T

A

= –30

°

C

T

A

= 25

°

C

10585

70

5.0

0

1.0

4.0

3.0

2.0

–35 –15

T

A

= 75

°

C

T

A

= 75

°

C

T

A

= –30

°

C

V

CC

= 4.0 Vdc

f

o

= 10.7 MHz

RF INPUT (dBm)

THD, TOT AL HARMONIC DISTORTION (%)

RSSI OUT( A)

µ

Figure 4. RSSI versus RF Input

V

CC

= 4.0 Vdc

RF Input = –30 dBm

f

o

= 10.7 MHz

TYPICAL CURVES

(Unmatched Input)

RSSI OUTPUT( A)

µ

–30 dBm

45 6525–35 –15

–70 dBm

T

A

, AMBIENT TEMPERATURE (

°

C)

5.0 105–55 12585

V

CC

= 4.0 Vdc

f

o

= 10.7 MHz

–110 dBm

–20

–10

V

CC

= 4.0 Vdc

T

A

= 27

°

C

100 MHz

3rd Order Products

–50

–60

–40

–30

–70

– 20 0 10– 50 – 10– 30– 40– 70

RF INPUT (dBm)

– 60

0

100 MHz

Desired Products

MIXER OUTPUT (dBm)

30

18

60

T

A

= –30

°

C

T

A

= 25

°

C

f

o

= 10.7 MHz

RF

in

–40 dBm

1.8 k

Ω

Load

T

A

= 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 dBm

10

–15 dBm

1.0

–20 dBm

–10 dBm

5.0 dBm

40

f, FREQUENCY (MHz)

30

20

0

10010 1000

107.06.05.03.0 4.0

V

CC

, SUPPLY VOLT AGE (V)

1.0 2.0

30

27

24

0

15

3.0

0

RSSI OUTPUT( A)

µ

MIXER GAIN (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

V

CC

= 4.0 Vdc

T

A

= 27

°

C

RF

in

= –40 dBm

MC3371 MC3372

6

MOTOROLA ANALOG IC DEVICE DATA

MC3371 PIN FUNCTION DESCRIPTION

OPERATING CONDITIONS V

CC

= 4.0 Vdc, RF

In

= 100 µV, f

mod

= 1.0 kHz, f

dev

= 3.0 kHz. MC3371 at f

RF

= 10.7 MHz (see Figure 11).

Pin

Symbol

Internal Equivalent

Circuit

Description Waveform

1 OSC1

OSC1

V

CC

1

15 k

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.

2 OSC2

200

µ

A

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.

3 MX

Out

3

4

Mixer

Out

V

CC

Output of the Mixer. Riding on the

455 kHz is the RF carrier component.

The typical level is approximately

60 mVpp.

4 V

CC

100

µ

A

1

.

5

k

Supply Voltage –2.0 to 9.0 Vdc is the

operating range. V

CC

is decoupled to

ground.

5 IF

In

1.8 k

7

51 k

53 k

5

IF

In

6

DEC1

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.

6

7

DEC1

DEC2

DEC2

60

µ

A

IF Decoupling. External 0.1 µF

capacitors connected to V

CC

.

8 Quad

Coil

10

V

CC

8

Quad Coil

50

µ

A

Quadrature Tuning Coil. Composite

(not yet demodulated) 455 kHz IF

signal is present. The typical level is

500 mVpp.