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AS3560/61 Demo Board Manual 1.1
www.austriamicrosystems.com Revision 1.10 1 - 14
Class-G/Class-H Stereo Headphone Amplifier
Demo Board Manual
AS3560/61
Eval Board V1.1
www.austriamicrosystems.com
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General Description
Board Description
Figure 1: Board Description – Meas. Points, Jumpers, Switches
Connector Description
Label Name Description Info
BU1, BU3
AVDD
Supply Input
BU2, BU4
GND
Ground
Supply voltage ranging from 2.3V to 5.5V
J1
I2C Interface
I2C 6-Pin Connector
Connects to I2C control interface (e.g.
austriamicrosystems USB Interface Box)
U2
Right Input
Right Input Connector
U3
Headphone
Headphone Connector
U4
Left Input
Left Input Connector
U5
Stereo Input
Stereo Input Connector
J1 – I2C Interface Connector Description
Label Name AS1116
1
NC
Not connected
2
NC
Not connected
3
NC
Not connected
4
CSCL
I2C interface clock signal
5
GND
Ground
12
34
56
6
CSDA
I2C interface data signal
J2
Label Name Description Info
INLN
Inverting left input for differential signals
INLP
Non-inverting left input for differential signals
INRP
Non-Inverting right input for differential signals
INRN
Inverting right input for differential signals
J3
Label Name Description Info
GND
Ground
SDA
PC data
SCL
PC clock
HPVSS
Charge pump output
J4
Label Name Description Info
AVDD
Primary power supply for device
SW
Buck converter switching node
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CPP
Charge pump positive flying cap
CPN
Charge pump negative flying cap
J5
Label Name Description Info
HPVDD
Power supply for headphone amplifier (DC/DC output node)
HPL
Left channel headphone amplifier output
HPR
Right channel headphone amplifier output
SGND
Ground sense
J6, J9, J13, J14
Label Name Description Info
GND
Ground
J7
Label Name Description Info
AVDD
Primary power supply for device
J8
Label Name Description Info
PWR LED
Set jumper to enable power LED
remove jumper for power consumption measurements
J10
Label Name Description Info
INRN
Inverting right input for differential signals
INRN
Inverting right input for differential signals
INRP
Non-Inverting right input for differential signals
INRP
Non-Inverting right input for differential signals
J11
Label Name Description Info
INLN
Inverting left input for differential signals
INLN
Inverting left input for differential signals
INLP
Non-inverting left input for differential signals
INLP
Non-inverting left input for differential signals
J12
Label Name Description Info
HPR
Right channel headphone amplifier output
GND
Ground
GND
Ground
HPL
Left channel headphone amplifier output
J21
Label Name Description Info
INRN
Inverting right input for differential signals
GND
Ground
GND
Ground
INLN
Inverting left input for differential signals
Jumpers
Label Name Description Info
J8
Power LED
J15
Enable I2C
J16
Enable I2C
J19
Enable Stereo Socket
J20
Enable Stereo Socket
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AS3560/61 Evaluation System
Following figure shows the basic elements to have a simple setup for demonstration and evaluation of the
AS3560/61.
Figure 2: AS3560/61 system
Basic elements of the AS3560/61 system are:
• USB Interface Box: connect it to the AS3560/61 board with a 6 wire cable to the I2C connector. Connect
it to the PC with a standard USB connection cable.
• AS3560/61 Board: The board should be connected to a supply either by standard mini banana
connectors or standard banana connectors.
• Left differential input: connect a 3.5mm audio cable to this plug and your left input source.
• Right differential input: connect a 3.5mm audio cable to this plug and your right input source.
• Output: connect a headphone to this plug.
Battery
USB Interface Box
AS3560/61 Eval Board
Left differential input Right differential input Output
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Software
To control all features of the chip with a simple-to-use graphical user interface, the Evaluation Suite Software is
available for Windows (98, XP, Vista, 7).
This SW controls the I2C interface of the chip through a USB interface box.
Software Installation
Software Installation – STEP 1
Start the installer program “AS3560EvalSW_Setup.msi” to do the SW setup. This installer will guide you through
the process of SW installation.
Figure 3: AS3560EvalSW Installation Wizard
Software Installation – STEP 2
After the SW is successfully installed, connect the USB box. Within the installation dialogs, select following
settings:
Figure 4: Found New Hardware Wizard
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Figure 5: Found New Hardware Wizard cont
Figure 6: Found New Hardware Wizard
Browse: C:\Program Files\austriamicrosystems\AS3560 Evaluation Software\USB Driver
Figure 7: Hardware Installation - select Continue Anyway
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Figure 8: Finished
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Software User Manual
After starting the AS3560/61 Evaluation Software, make sure that the connection to the PC and the AS3560/61
Evalboard is established (green indicators).
Figure 9: AS3560/61 Evaluation Software
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Figure 10: Software Shutdown
At first you should uncheck the “Software Shutdown” checkbox to turn on the amplifier.
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Figure 11: Headphone Settings
Here you can adjust the left and right output channel separately. You have the option to mute, enable or enable
HiZ.
Enable HiZ set the left respectively the right channel output to high impedance mode.
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Figure 12: Volume
To adjust the volume you can either use the slider or the drop-down-menu to set the volume from -59dB to +4dB.
Figure 13: AS3560/61 Register Map
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Software in extended User Mode / Test Modes
To enable testing of the amplifier in different modes, a special test mode can be enabled by a combined key
press of STRG + ALT + s.
With that combined key press, an additional menu item will appear for setting the amplifier to different operating
modes. Note that setting modes reports “Write Register … Status: Verify failed” as some of the test bits are read
only registers that cannot be read back for verification.
Figure 14: AS3560/61 with Test Modes enabled
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Board schematics
Figure 15: Schematic 1 / 2
Figure 26: Schematic 2 / 2
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Copyright
Copyright © 2010, austriamicrosystems AG, Tobelbaderstraße 30, 8141 Unterpremstätten - Graz, Austria -
Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted,
merged, translated, 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. Austriamicrosystems 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. For shipments of less than 100 parts the manufacturing flow might
show deviations from the standard production flow, such as test flow or test location.
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 technical 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
Tobelbaderstraße 30
A-8141 Unterpremstätten - Graz, Austria
T. +43 (0) 3136 500 0
F. +43 (0) 3136 5692
For Sales Offices, Distributors and Representatives, please visit:
http://www.austriamicrosystems.com/contact-us
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