MOSA ELECTRONICS

MS6610

Stereo Audio DAC

- 4 -

www.mosanalog.com.tw

TIMING AND DATA FORMAT

The MS6610 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 LOW

level on the word select input(WS) input data is placed in the right input register and with HIGH level on the WS input

data is placed in the left register. The data in the input registers are simultaneously latched in the output registers which

control the bit switches. Internal bias currents IBL and IBR are each added to the full scale output current IFS in order

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

1) is 2/3 VDD. In this way the maximum dynamic range is achieved over the entire power supply range.

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

MEASUREMENT BLOCK DIAGRAM

R-ch

L-ch

AC Level (Vrms)

THD

THD+N

Generate

sinewave pattern for

BCK.WS.DATA

MS6610

MS6308

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.