austria
micro
systems
AS1701, AS1706
1.6W Audio Power Amplifiers
Product Brief
1997-2005, austriamicrosystems AG, 8141 Unterpremstaetten, Austria-Europe. All Rights Reserved.
www.austriamicrosystems.com
Revision 1.11
1 - 2
1 General Description
The AS1701 and AS1706 are 1.6W bridged audio power
amplifiers that provide excellent circuit reliability, provid-
ing a very low-cost solution by eliminating external com-
ponents when used with 2.7 to 5.5V-powered circuits.
The devices have superb total harmonic distortion
(THD) at high-power output and excellent power supply
rejection with 4- and 8
-loads.
Integrated over-temperature and over-current protection
circuitry switch the devices off in case of an output
short-circuit. A digital input allows the devices to auto-
matically switch into shutdown mode. Click- and pop-
suppression circuitry reduces audible clicks and pops
during power-up and shutdown. The gain (A
V
) of the
devices is controlled using external resistors.
The AS1701/AS1706 are available in an 8-pin MSOP
package.
Figure 1. Typical Configuration Block Diagram
2 Key Features
!
2.7 to 5.5V (V
CC
) Single-Supply Operation
!
Very High PSRR: Greater Than 65dB @ 217Hz
!
THD+Noise: 1.6W into 4
at 1%
!
No Output Coupling Capacitors Required
!
External Gain Configuration Capability
!
Low-Power Shutdown Mode: 10nA
!
Click and Pop Suppression
!
Over-Temperature and Over-Current Protection
!
Operating Temperature Range: -40 to +85C
!
8-pin MSOP Package
3 Applications
The AS1701/AS1706 are ideal as audio front-ends for
battery powered audio devices such as MP3 and CD
players, mobile phones, PDAs, portable DVD players,
and any other hand-held battery-powered device.
RL =
4 or 8
40k
40k
50k
50k
V
DD
/2
Bias
20k
R
F
V
DD
+
C
S
10F
Av = -1
C
B
0.1 to
1F
+
+
AS1701/
AS1706
GND 7
2
BIAS
8
OUT-
5
OUT+
6 V
DD
1
SHDN
20k
R
IN
+
C
IN
0.33F
Audio
Input
4
IN-
3
IN+
AS1701, AS1706
austria
micro
systems
Product Brief
1997-2005, austriamicrosystems AG, 8141 Unterpremstaetten, Austria-Europe. All Rights Reserved.
www.austriamicrosystems.com
Revision 1.11
2 - 2
Copyrights
Copyright 1997-2005, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe.
Trademarks Registered . All rights reserved. The material herein may not be reproduced, adapted, merged, trans-
lated, stored, or used without the prior written consent of the copyright owner.
All products and companies mentioned are trademarks or registered trademarks of their respective companies.
Disclaimer
Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing
in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding
the information set forth herein or regarding the freedom of the described devices from patent infringement. austriami-
crosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior
to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information.
This product is intended for use in normal commercial applications. Applications requiring extended temperature
range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-
sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for
each application.
The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However,
austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to
personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or
consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the tech-
nical data herein. No obligation or liability to recipient or any third party shall arise or flow out of
austriamicrosystems AG rendering of technical or other services.
Contact Information
Headquarters
austriamicrosystems AG
A-8141 Schloss Premstaetten, Austria
Tel: +43 (0) 3136 500 0
Fax: +43 (0) 3136 525 01
e-mail:
info@austriamicrosystems.com
For Sales Offices, Distributors and Representatives, please visit:
http://www.austriamicrosystems.com
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