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austriamicrosystems AG
austriamicrosystems AG

AS1706 Datasheet Preview

AS1706 Datasheet

1.6W Audio Power Amplifiers

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AS1706 pdf
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AS1701, AS1706
1.6W Audio Power Amplifiers
Data Sheet
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 8Ω-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 (AV) 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 (VDD) Single-Supply Operation
! Very High PSRR: Greater Than 65dB @ 217Hz
! THD+Noise: 1.6W into 4Ω 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 +85°C
! 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.
20kΩ RF
Audio
Input
CIN
0.33µF
RIN
20kΩ
4
IN-
3
IN+
0.1 to +
1µF CB
2
BIAS
1
SHDN
VDD
+
10µF CS
6 VDD
+
Bias
50kΩ
VDD/2
50kΩ
GND 7
40kΩ
40kΩ
+
Av = -1
AS1701/
AS1706
5
OUT+
8
OUT-
RL =
4 or 8Ω
www.austriamicrosystems.com
Revision 1.52
1 - 17



austriamicrosystems AG
austriamicrosystems AG

AS1706 Datasheet Preview

AS1706 Datasheet

1.6W Audio Power Amplifiers

No Preview Available !

AS1706 pdf
AS1701, AS1706
Data Sheet - Pinout
4 Pinout
Pin Assignments
Figure 2. Pin Assignment – 8-Pin MSOP Package (Top View)
SHDN 1
8 OUT-
BIAS 2
IN+ 3
AS1701/
AS1706
7 GND
6 VDD
IN- 4
5 OUT+
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Pin Descriptions
Table 1. Pin Descriptions
Pin Name
1 SHDN
2 BIAS
3 IN+
4 IN-
5 OUT+
6 VDD
7 GND
8 OUT-
Description
Shutdown. Connect this pin to GND for the AS1701 (active-high); connect this
pin to VDD for the AS1706 (active-low).
DC Bias Bypass
Non-Inverting Input
Inverting Input
Positive Differential Output
Power Supply
Ground
Negative Differential Output
www.austriamicrosystems.com
Revision 1.52
2 - 17


Part Number AS1706
Description 1.6W Audio Power Amplifiers
Maker austriamicrosystems AG
Total Page 17 Pages
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AS1706 pdf
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