ULN3718 Allegro MicroSystems, Inc., ULN3718 Datasheet

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ULN3718

Manufacturer Part Number
ULN3718
Description
Low-voltage Audio Power Amplifier
Manufacturer
Allegro MicroSystems, Inc.
Datasheet

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3718
LOW-VOLTAGE AUDIO POWER AMPLIFIER
Supply Voltage, V
Package Power Dissipation,
Operating Temperature Range,
Storage Temperature Range,
ABSOLUTE MAXIMUM RATINGS
P
T
T
D
A
S
. . . . . . . . . . . . . . . . . . . . See Graph
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . -65 C to +150 C
CC
. . . . . . . . . . . . . . 10 V
-20 C to +85 C
3718
amplifiers, the ULN3718M integrated circuit is ideal for application
as a headphone driver in portable radios, tape players, and other
battery-operated equipment. The low-power audio amplifier’s wide
frequency response and low noise ensure premium performance.
as low as 1.8 V without a significant increase in distortion. This feature
allows operation with a 3 V battery supply and minimizes concern
about weak batteries. The class-AB audio amplifier has low quiescent
current drain for maximum battery life. This device is rated for opera-
tion with supply voltages up to 9 V.
plastic package. A copper alloy lead frame gives the amplifier en-
hanced power dissipation ratings.
FEATURES
Always order by complete part number: ULN3718M .
Wide Operating Voltage Range 1.8 - 9.0 V
Low Quiescent Current
AC Short-Circuit Protection
Low External Parts Count
Low Distortion
40 dB Voltage Gain
Low Noise
Providing a low-cost, compact alternative to discrete transistor
The amplifier will operate (at reduced volume) with supply voltages
The ULN3718M audio amplifier is supplied in an 8-pin mini-DIP
AUDIO POWER AMPLIFIER
LOW-VOLTAGE

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ULN3718 Summary of contents

Page 1

... The class-AB audio amplifier has low quiescent current drain for maximum battery life. This device is rated for opera- tion with supply voltages The ULN3718M audio amplifier is supplied in an 8-pin mini-DIP plastic package. A copper alloy lead frame gives the amplifier en- hanced power dissipation ratings. ...

Page 2

... Input Shorted kHz Pin 8 C (Pin 1) = 500 120 Hz D TEST CIRCUIT AND TYPICAL 125 150 Dwg. GP-009-1B 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 W Copyright © 1985, 1995, Allegro MicroSystems, Inc 400 Limits Min. Typ. Max. Units 1.8 3.0 9 ...

Page 3

LOW-VOLTAGE AUDIO POWER AMPLIFIER QUIESCENT SUPPLY CURRENT AS A FUNCTION OF SUPPLY VOLTAGE SUPPLY VOLTAGE VOLTS CC TYPICAL CHARACTERISTICS FUNCTION OF SUPPLY VOLTAGE 1000 800 600 400 200 ...

Page 4

LOW-VOLTAGE AUDIO POWER AMPLIFIER APPLICATIONS INFORMATION Selection of power-supply voltage and speaker impedance allows a designer to choose audio power levels within the allowable package power dissipation rating for any maximum operating temperature. No unique precautions are necessary when ...

Page 5

LOW-VOLTAGE AUDIO POWER AMPLIFIER 0.280 0.240 0.070 0.045 0.210 MAX 0.015 MIN 7.11 6.10 1.77 1.15 5.33 MAX 0.39 MIN NOTES: 1. Lead thickness is measured at seating plane or below. 2. Lead spacing tolerance is non-cumulative. 3. Exact ...

Page 6

... LOW-VOLTAGE AUDIO POWER AMPLIFIER Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the design of its products. Components made under military approvals will be in accordance with the approval requirements. ...

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