DA6116.001
27 February, 2009
APPLICATION INFORMATION
Application Note 3 – Single supply voltage usage
Single supply voltage circuit below is based on signal AC coupling and biasing output opamp in the middle point of
supply voltages. Note that only right channel circuit is presented. The left channel circuit would be exactly the
same. The component values have been chosen to limit overall lower corner frequency to about 10 Hz.
AVCC DVCC
+ 5V supply
10µF
RFO
MAS6116
(Right Channel)
1MΩ
1MΩ
IN
+
-
OUT (inverted)
10µF
10µF
RIN
RM
100nF
AC
10kΩ
1MΩ
RGND
LGND
DGND
AGND
Application Note 4 – Lower supply voltage MCU communication example 1
If the serial control interface is driven from MCU which operates from lower supply voltage than MAS6116 which is
using higher 5V voltage supply there is level shifting needed for keeping the digital signal levels proper in the
communication. The bi-directional DATA line requires additionally level shifting in both directions. Figure below
shows an example of serial interface level shifting between 3V and 5V voltage supplies. In this example level
shifters with output enable function are used. The output enable function is used to disable level shifter output
when data direction changes in the bi-directional data line of MAS6116.
+3V
+5V
+5V
DVDD
AVDD
VDD
+3V
+5V
GPIO
MAS6116
MCU
DATA
GPIO
GPIO
OE
+5V
+5V
+5V
CLK
XCS
GPIO
GPIO
GPIO
XMUTE
14 (18)
MAS [ MICRO ANALOG SYSTEMS ]
