SNC207S
Direct Drive Speech Controller
5.8. DAC & PWM
SNC207S is an advanced chip to be designed having two optimal methods to play out
the voices. One is DAC and the other is PWM. Upon user’s applications, user can
select either DAC or PWM in his design. Please be aware that only one method can
be activated at a time.
DAC: A 7-bit current type digital-to-analog converter is built-in SNC207S. The
relationship between input digital data and output analog current signal is listed in
the following table. Also, the recommended application circuit is illustrated as
follows.
Input data
Typical value of output current (mA)
0
0
1
3/127
…
N
n*(3/127)
3
…
127
VCC
BUO1/VO
1K
DAC output
6
Ver: 0.3
Sept 20, 2007
SONIX [ SONIX TECHNOLOGY COMPANY ]
