SNC698
4-Channel Speech Controller
5.10 8-bit PWM
A PWM (pulse width modulation) circuit is built-in SNC698. PWM can convert input
digital data into pulse trains with suitable different pulse width. The maximum
resolution of PWM is 8 bits. Two huge output stage circuits are included in SNC698.
Both of them are capable of driving speaker directly. Besides, 15 level PWM output
current is provided for volume adjust function.
#
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Output Current
(VDD=3V, Vo=1.5V)
0000
120mA
0001
105mA
0010
90mA
0011
75mA
0100
60mA
0101
52.5mA
0110
45mA
0111
37.5mA
1000
30mA
1001
22.5mA
1010
15mA
1011
10.25mA
1100
7.5mA
1101
3.75mA
1110
3.75mA
1111
0mA
15 levels PWM output current control
VOL[3..0]
BUO1/VO
BUO2
PWM output
Ver: 1.3
8
June 8, 2005
SONIX [ SONIX TECHNOLOGY COMPANY ]
