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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.

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.

MAS6116

DATA

+5V

+5V

DVDD

AVDD

CLK

XCS

XMUTE

MCU

+3V

GPIO

GPIO

GPIO

GPIO

VDD

GPIO

GPIO

+5V

+5V

OE

+5V

+5V

+3V

AVCC

DVCC

+ 5V supply

MAS6116

RFO

(Right Channel)

1MΩ

1MΩ

IN

10µF

+

10µF

OUT (inverted)

RIN

RM

-

100nF

1MΩ

10kΩ

RGND

DGND

LGND

AGND

10µF

AC