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3718 Datasheet Preview

3718 Datasheet

LOW-VOLTAGE AUDIO POWER AMPLIFIER

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3718
3718LOW-VOLTAGE AUDIO POWER AMPLIFIER
LOW-VOLTAGE
AUDIO POWER AMPLIFIER
Providing a low-cost, compact alternative to discrete transistor
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
Tfrequency response and low noise ensure premium performance.
CThe amplifier will operate (at reduced volume) with supply voltages
as low as 1.8 V without a significant increase in distortion. This feature
Uallows operation with a 3 V battery supply and minimizes concern
Yabout weak batteries. The class-AB audio amplifier has low quiescent
D Lcurrent drain for maximum battery life. This device is rated for opera-
tion with supply voltages up to 9 V.
O NThe ULN3718M audio amplifier is supplied in an 8-pin mini-DIP
R Oplastic package. A copper alloy lead frame gives the amplifier en-
Phanced power dissipation ratings.
ED NCEFEATURES
U Es Wide Operating Voltage Range 1.8 - 9.0 V
IN Rs Low Quiescent Current
s AC Short-Circuit Protection
T Es Low External Parts Count
Fs Low Distortion
N Es 40 dB Voltage Gain
O s Low Noise
ISC R RABSOLUTE MAXIMUM RATINGS
D FOSupply Voltage, VCC . . . . . . . . . . . . . . 10 V
Package Power Dissipation,
PD . . . . . . . . . . . . . . . . . . . . See Graph
Operating Temperature Range,
TA . . . . . . . . . . . . . . . . -20°C to +85°C
Storage Temperature Range,
TS . . . . . . . . . . . . . . . -65°C to +150°C
Always order by complete part number: ULN3718M .




Allegro MicroSystems

3718 Datasheet Preview

3718 Datasheet

LOW-VOLTAGE AUDIO POWER AMPLIFIER

No Preview Available !

3718
LOW-VOLTAGE AUDIO POWER AMPLIFIER
ELECTRICAL CHARACTERISTICS
(unless otherwise noted).
at
TA
=
+25°C,
VCC
=
3
V,
RL
=
32,
fin
=
400
Hz
Characteristic
Supply Voltage Range
Quiescent Supply Current
Voltage Gain
Audio Power Output
Distortion
Output Noise
Input Resistance
Power Supply Rejection
Symbol
VCC
ICC
AV
POUT
THD
Vout
RIN
PSRR
Test Conditions
VCC = 3.0 V
VCC = 6.0 V
VCC = 9.0 V
RL = 8, VCC = 3.0 V, THD = 10%
RL = 8, VCC = 6.0 V, THD = 10%
RL = 32, VCC = 3.0 V, THD = 10%
RL = 32, VCC = 6.0 V, THD = 10%
POUT = 10 mW
POUT = 1.0 mW, VCC = 1.8 V
Input Shorted, BW = 80 kHz
Pin 8
CD (Pin 1) = 500 µF, f = 120 Hz
Min.
1.8
36
250
15
Limits
Typ. Max.
3.0 9.0
6.0 10
9.0 15
12 20
40 44
80 —
430 —
25 —
125 —
0.3 1.0
1.5 3.0
200 500
250 —
28 —
Units
V
mA
mA
mA
dB
mW
mW
mW
mW
%
%
µV
k
dB
TEST CIRCUIT AND TYPICAL
2.0 APPLICATION
RθJC = 55°C/W
1.5
1.0
FREE AIR, R θJA= 80°C/W
0.5
0
25
50
75
100 125
150
TEMPERATURE IN °C
Dwg. GP-009-1B
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1985, 1995, Allegro MicroSystems, Inc.


Part Number 3718
Description LOW-VOLTAGE AUDIO POWER AMPLIFIER
Maker Allegro MicroSystems
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3718 Datasheet PDF






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