AS1339 - Evaluation Board
Application Note
General Description
Board Description
Figure 1: Board Description - Connector
Figure 2: Board Description – Measurement Points
Connector Description
Label
Name
Description
Info
A
B
C
D
E
F
VIN
GND
LDO1
LDO2
VPA
REFIN
Input Voltage
Ground
LDO1 Output Connector
LDO2 Output Connector
Step-Down Output Connector
DAC Controlled Input
Input voltage ranging from 2.7V to 5.5V
Output voltage: 2.85V
Output voltage ranging from 0.8V to 3.75V
Reference voltage for step-down converter
Measurement Points Description
Label
Name
Description
Info
K
L
M
N
O
P
Q
R
S
T
U
PA_EN
EN1
EN2
GND
IN1
IN2
VPA
LDO1
LDO2
LX
REFIN
Enable for Step-Down
Enable for LDO1
Enable for LDO2
Ground.
Power Input for the Step-Down
Power Input for the LDO’s
Output of the Step-Down
Output of the LDO1
Output of the LDO2
External Inductor
Reference Input
Measurement Points
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Revision 1.00
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AS1339 - Evaluation Board
Application Note
Jumper Description
Label
Name
Description
Info
G
PA_EN
Enable Jumper Step-
Down
ON = The Step-Down of the AS1339 is on.
OFF = The Step-Down of the AS1339 is off.
ON = The LDO1 of the AS1339 is on.
H
EN1
Enable Jumper LDO1
OFF = The LDO1 of the AS1339 is off.
ON = The LDO2 of the AS1339 is on.
I
EN2
Enable Jumper LDO2
OFF = The LDO2 of the AS1339 is off.
R2 and R1 are set;
The Output Voltage of the Step-Down is regulated to
1.8V.
R2 is open, R1 is set;
The Output Voltage of the Step-Down is regulated to
3.75V or is in Bypass Mode.
R2 is set, R1 is open;
The Output Voltage of the Step-Down is regulated to
maximum 0.8V.
R2 and R1 are open;
The Output Voltage of the Step-Down can be set via an
external source on Connector
“F”
(REFIN). Allowed
Voltage Range on REFIN: GND to VIN
Voltage Divider
Pull - up
J
R2, R1
Pull - down
Connector F (REFIN)
Note:
-
-
For all current measurements remove both jumper
“J”
(R1 and R2).
Due to the tolerances of the external resistances R1 and R2, the stated output voltages of the Step-
Down converter are not guaranteed.
Operational sequence
This evaluation board comes with the AS1339.
1.
2.
3.
Drive the IC on the evaluation board only with the recommended settings and values as described in the
datasheet.
Connect a 2.7V to 5.5V power supply (VIN
“A”
and GND
“B”).
Perform measurements at the measurement points
“K”
to
“U”.
If there are questions do not hesitate to contact us. See contact information at the end of the application note.
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Revision 1.00
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AS1339 - Evaluation Board
Application Note
Copyright
Copyright © 1997-2009, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, 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.
Diclaimer
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 lifesustaining 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
A-8141 Schloss Premstätten, 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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