MOSA

MS6257

Gain and Attenuation Volume Controller IC

REV 6

10

www.mosanalog.com

An example of the volume control.

(Volume = Ax + Bx + Cx)

Set two channels at 0dB.

(Ax + Bx + Cx

=

0dB + 0dB + 0dB)

next, the volume changes from 0dB to -9dB.

(Ax + Bx + Cx = -9dB + 0dB + 0dB)

next, the volume changes from -9dB to -19dB.

(Ax + Bx + Cx = -9dB + -10dB + 0dB)

next, the volume changes from -19dB to -20dB.

(Ax + Bx + Cx = 0dB + -20dB + 0dB)

next, the volume changes from -20dB to -14dB.

(Ax + Bx + Cx = 0dB + -20dB + 6dB)

next, the volume changes from -14dB to +6dB.

(Ax + Bx + Cx = 0dB + 0dB + 6dB)

Note: 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 +10dB to –69dB.