General Description
The AS1701 and AS1706 are 1.6W bridged audio power amplifiers that provide excellent circuit reliability, providing a very low-cost solution by eliminating external components 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 automatically 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.
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.
Typical Configuration Block Diagram
Pin Assignment – 8-Pin MSOP Package (Top View)
Pin Descriptions
|
Pin
|
Name
|
Description
|
|
1
|
SHDN
|
Shutdown. Connect this pin to GND for the AS1701 (active-high); connect this pin to VDD for the AS1706 (active-low).
|
|
2
|
BIAS
|
DC Bias Bypass
|
|
3
|
IN+
|
Non-Inverting Input
|
|
4
|
IN-
|
Inverting Input
|
|
5
|
OUT+
|
Positive Differential Output
|
|
6
|
VDD
|
Power Supply
|
|
7
|
GND
|
Ground
|
|
8
|
OUT-
|
Negative Differential Output
|
