MOSA

MS6274

Volume Controller with soft step IC

V1.5

9/19

www.mosanalog.com

Soft-step time / ON / OFF , SE/DIFF Selector (0H)

MSB

LSB

Function

D7

D6

D5

D4

D3

D2

D1

D0

Soft-step Time

0

0

0

0.64ms

0

0

1

1.28ms

0

1

0

2.56ms

0

1

1

5.12ms

1

0

0

10.24ms

1

0

1

20.48ms

1

1

0

40.96ms

1

1

1

81.92ms

Soft-step

0

On

1

Off

SE/DIFF

0

Differential

1

Single-ended

The initial condition is Single-ended, Soft-step Off, Soft-step time 40.96ms.

Input selector & Gain Control (01H , 02H , 03H)

MSB

LSB

Function

D7

D6

D5

D4

D3

D2

D1

D0

Input selector

0

0

IN 1

0

1

IN 2

1

0

IN 3

1

1

IN 4 / DIFF

Input Gain

0

0

0

0

0dB

0

0

0

1

1dB

0

0

1

0

2dB

0

0

1

1

3dB

0

1

0

0

4dB

0

1

0

1

5dB

0

1

1

0

6dB

0

1

1

1

7dB

1

0

0

0

8dB

1

0

0

1

9dB

1

0

1

0

10dB

1

0

1

1

11dB

1

1

0

0

12dB

1

1

0

1

13dB

1

1

1

0

14dB

1

1

1

1

15dB

The initial condition is IN4, 14dB. We suggest the gain is set as the power is up. For example, set and fix the gain

+10dB, the volume range will be controlled from -69dB to +25dB.