MOSA ELECTRONICS

MS6311

Stereo Audio DAC

- 4 -

www.mosanalog.com.tw

TIMING AND DATA FORMAT

The MS6311 accepts input serial data formats of 16-bit word length. Left and right data words are time

multiplexed. The MSB (bit 1) must always be first. The format of data input is shown in Figs. 2 and 3. With a HIGH

level on the word select input (WS), data is placed in the left input register and with LOW level on the WS input, data is

placed in the right register (Fig. 1). The data in the input registers are simultaneously latched in the output registers

order to achieve the maximum dynamic range at the outputs of OP1 and OP2(Fig. 1). The reference voltage Vref (Fig. 1)

RIGHT

WS

BCK

DATA

LSB

MSB

t

r

t

HB

t

f

t

cr

t

LB

t

HW

t

SW

LEFT

t

SD

t

HD

Fig.2

Timing and input signals.

0

1

2

15

14

13

210

MSB

LSB

15

14

13

21

0

MSB

LSB

RIGHT

LEFT

WS

BCK

DATA

Fig.3

Format of input signals.

MEASUREMENT BLOCK DIAGRAM

R-ch

L-ch

AC Level(Vrms)

THD

THD+N

Generate

sinewave pattern for

BCK.WS.DATA

MS6311

f = 1 kHz

2Vp-p

sinewave

Pattern

Generator

DAC

OPAmp

Analysis

Equipment

NOTE : THD and THD+N is measured by HP AUDIO ANALYZER and FFT Analysis.