AS1702/03/04/05
austriamicrosystems
Demoboard Application Note
www.austriamicrosystems.com Revision 1.00 3 - 4
Circuit
Starting Up
Soldered Chip
The AS1702/3/4/5 demo board is designed to work with the
AS1702, AS1703, AS1704 and the AS1705. Before using the
Demoboard please make sure which chip is on the board and set
the Jumpers appropriate if necessary. The marking of the chip can
be found printed on the IC soldered on the board.
Per default an AS1702 is mounted on the Demoboard
Two different Jumper settings are necessary, one for the AS1702
and another for the AS1703/04/05.
If an AS1703, AS1704, AS1705 is soldered, set the following jumpers:
Mark Jumper Description Jumper Set Value
A J16 R
IN
of IN- SET R
IN
= 0kOhm
B J17 R
IN
of IN+ SET R
IN
= 0kOhm
C Av Gain of the Amplifier NOT SET Gain of IC. See datasheet.
D SHDN Shutdown SET (2 values possible)
VDD/GND
E SHDM Shutdown Mode SET (2 values possible)
VDD/GND
F J7 Output Impedance OPTIONAL (3 values possible) Load = 0 / 4 / 8Ohm
If an AS1702 is soldered, set the following jumpers:
Mark Jumper Description Jumper Set Value
A J16 R
IN
of IN- NOT SET R
IN
= 75kOhm
B J17 R
IN
of IN+ NOT SET R
IN
= 75kOhm
C Av Gain of the Amplifier SET (2 values possible) Av = 2 / 4 (6dB / 12dB)
D SHDN Shutdown SET (2 values possible)
VDD/GND
E SHDM Shutdown Mode SET (2 values possible)
VDD/GND
F J7 Output Impedance OPTIONAL (3 values possible) Load = 0 / 4 / 8Ohm
