MC3340.PDF

Order this document by MC3340/D

The MC3340 is a simple but very effective electronic attenuator. This

device offers up to 80 dB of attenuation control for frequencies to 1.0 MHz.

THD (distortion) is less than 1% – up to 15 dB attenuation and less than 3% –

up to 40 dB.

Typical uses include instrumentation control, remote control audio

amplifiers, electronic games, and CATV (cable TV) set–top converter audio

control.

•

ELECTRONIC ATTENUATOR

SEMICONDUCTOR

TECHNICAL DATA

Designed for use in:

DC Operated Volume Control

Compression and Expansion Amplifier Applications

•

Controlled by DC Voltage or External Variable Resistor

•

Economical 8–Pin Dual–In–Line Package

P SUFFIX

PLASTIC PACKAGE

CASE 626

MAXIMUM RATINGS (T A = 25 ° C, unless otherwise noted.)

Rating

Symbol

Value

Unit

Power Supply Voltage

V CC

Vdc

ORDERING INFORMATION

Power Dissipation @ T A = 25 ° C

Derate above T A = 25 ° C

P D

1.2

mW/ ° C

Operating

Temperature Range

Device

Package

Operating Ambient Temperature Range

T A

0 to 75

° C

MC3340P

T A = 0 to 75

Plastic DIP

NOTE:

ESD data available upon request.

Figure 1. Typical DC Remote Volume Control

V CC

1. 0 m F

MC3340

e o

50 m F

620 pF

Remotely

Located

Potentiometer

50k

R C

W Motorola, Inc. 1998

Rev 6

MOTOROLA ANALOG IC DEVICE DATA

MC3340

ELECTRICAL CHARACTERISTICS (e in = 100 mVrms, f = 1.0 kHz, V CC = 16 Vdc, T A = +25 ° C, unless otherwise noted.)

Circuit

Characteristics

Min

Typ

Max

Unit

Operating Power Supply Voltage

9.0

–

Vdc

V CC

e in

Control Terminal Sink Current, Pin 2

(e in = 0)

–

2.0

mAdc

1.0 m F

Maximum Input Voltage

–

0.5

Vrms

e o

Voltage Gain

–

50 m F

–

Attenuation Range from Maximum Gain

(V2 = 6.5 Vdc)

–

6 20 pF

Total Harmonic Distortion (Pin 2 Gnd)

(e in = 100 mVrms, e o = A v

–

0.6

1.0

e in)

•

Figure 2. Representative Schematic Diagram

V CC

6.2 k

5.1k

5.1 k

Roll–off

2 00

Output

750

4.7 k

5.1 k

10k

3.9 k

Control

5.1 k

Input

2 0 k

510

1.3 k

1.5 k

510

MOTOROLA ANALOG IC DEVICE DATA

MC3340

Figure 3. Attenuation versus

DC Control Voltage

Figure 4. Attenuation versus

Control Resistor

V CC =

8.0 Vdc

V CC =

12 Vdc

V CC =

16 Vdc

0 dB Reference = 13 dB Gain

f = 1.0 kHz

R C , is from Pin 2 to ground

100

1.5

2.5

3.5

4.5

5.5

6.5

4.0

6.0

8.0

V2, CONTROL VOLTAGE (V)

R C , CONTROL RESISTOR (k

)

Figure 5. Frequency Response

Figure 6. Output Voltage Swing

8.0

Input voltage (e in ) = 10 mV

Pin 6 uncompensated

6.0

8.0

6.0

4.0

2.0

8.0

9.0

100

1.0 k

10 k

100 k

1.0 M

10 M

100 M

f, FREQUENCY (Hz)

V CC , SUPPLY VOLTAGE (V)

Figure 7. Total Harmonic Distortion

4.0

3.0

2.0

0 dB Reference = 13 dB Gain

f = 1.0 kHz

e o = 2.5 Vrms

1.0

ATTENUATION (dB)

MOTOROLA ANALOG IC DEVICE DATA

MC3340

OUTLINE DIMENSIONS

P SUFFIX

PLASTIC PACKAGE

CASE 626–05

ISSUE K

NOTES:

1. DIMENSION L TO CENTER OF LEAD WHEN

FORMED PARALLEL.

2. PACKAGE CONTOUR OPTIONAL (ROUND OR

SQUARE CORNERS).

3. DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

–B–

MILLIMETERS

INCHES

DIM

MIN

MAX

MIN

MAX

9.40

10.16

0.370

0.400

–A–

NOTE 2

6.10

6.60

0.240

0.260

3.94

4.45

0.155

0.175

0.38

0.51

0.015

0.020

1.02

1.78

0.040

0.070

2.54 BSC

0.100 BSC

0.76

1.27

0.030

0.050

0.20

0.30

0.008

0.012

2.92

3.43

0.115

0.135

–T–

SEATING

PLANE

7.62 BSC

0.300 BSC

–––

0.76

1.01

0.030

0.040

0.13 (0.005)

B M

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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”

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Mfax is a trademark of Motorola, Inc.

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