MOSA

MS6266

6-Channel Electronic Volume Controller

REV 2

8/13

www.mosanalog.com

Data bytes description

Function bits

MSB

LSB

Function

1

1

1

0

A3

A2

A1

A0

6 channels, -1dB/step

1

1

0

1

B3

B2

B1

B0

6 channels, -10dB/step or +2dB/step

0

0

0

1

A3

A2

A1

A0

Channel 3, -1dB/step

0

0

0

0

B3

B2

B1

B0

Channel 3, -10dB/step or +2dB/step

0

0

1

1

A3

A2

A1

A0

Channel 4, -1dB/step

0

0

1

0

B3

B2

B1

B0

Channel 4, -10dB/step or +2dB/step

0

1

0

1

A3

A2

A1

A0

Channel 2, -1dB/step

0

1

0

0

B3

B2

B1

B0

Channel 2, -10dB/step or +2dB/step

0

1

1

1

A3

A2

A1

A0

Channel 5, -1dB/step

0

1

1

0

B3

B2

B1

B0

Channel 5, -10dB/step or +2dB/step

1

0

0

1

A3

A2

A1

A0

Channel 1, -1dB/step

1

0

0

0

B3

B2

B1

B0

Channel 1, -10dB/step or +2dB/step

1

0

1

1

A3

A2

A1

A0

Channel 6, -1dB/step

1

0

1

0

B3

B2

B1

B0

Channel 6, -10dB/step or +2dB/step

0

0

0

1

Power off preparation (pop noise free)

1

0

0

1

6 channels, mute On

1

1

1

1

1

0

0

0

6 channels, mute Off

Gain / Attenuation bits

A3

A2

A1

A0

Gain / Attenuation value (dB)

B3

B2

B1

B0

A

B

0

0

0

0

0

0

0

0

0

1

-1

-10

0

0

1

0

-2

-20

0

0

1

1

-3

-30

0

1

0

0

-4

-40

0

1

0

1

-5

-50

0

1

1

0

-6

-60

0

1

1

1

-7

-70

1

0

0

0

-8

+2

1

0

0

1

-9

+4

1

0

1

0

-

+6

1

0

1

1

-

+8

1

1

0

0

-

+10

1

1

0

1

-

+12

1

1

1

0

-

+14

1

1

1

1

-

+16

1. Where Ax=-1dB/step, Bx=-10dB/step or +2dB/step, -10dB and +2dB should not be loaded at the same time.

2. The initial condition is set to be maximum attenuation –79dB and mute on mode when the power on.

3. The output will drop down to ground gradually when enable power off preparation.

4. Odd gain 2N-1= N*(+2dB/step) + (-1dB), where N = 1~8. Please reference to examples.