MAX5486 Maxim Integrated Products, MAX5486 Datasheet - Page 9

• Manufacturer Part Number: MAX5486
• Description: Stereo Volume Control
• Manufacturer: Maxim Integrated Products

Figures 2a–2d. Volume-Control Operation
When both wipers are in the tap 31 position (-62dB
attenuation), further commands to DN/BALR place the
wipers in the mute position (see Table 1). UP/BALL or
MUTE pulses return the wipers to tap 31.
In balance-control mode, the MAX5486 adjusts the bal-
ance between the right and left channels while main-
taining the set volume. For example, if the volume of the
right channel equals the volume of the left channel,
forcing the balance towards the left channel increases
the attenuation of the right channel (Figure 3a). If the
left channel is at a higher attenuation than the right
channel, adjusting the balance to the left channel
moves the left channel’s wiper up to the same wiper
FROM 2c
H_
H_
H_
H_
L_
L_
L_
L_
(2a)
(2b)
(2c)
(2d)
_______________________________________________________________________________________
_______________________________________________________________________________________
Stereo Volume Control with Pushbutton
WR
WR
WR
WR
Balance Control
WL
WL
WL
WL
PRESS UP
PRESS UP
PRESS DN
PRESS UP
TWICE
ONCE
ONCE
ONCE
WR
WR
WR
WR
position as the right channel before it was attenuated
(Figure 3b).
The click-and-pop suppression feature reduces the
audible noise (clicks and pops) that results from wiper
transitions. The MAX5486 minimizes this noise by allow-
ing the wiper to change position only when V
(zero crossing) or after the zero crossing timeout
(126ms). Each wiper has its own suppression and time-
out circuitry. The MAX5486 changes wiper position
when V
(see Figures 4a and 4b).
The suppression circuitry monitors left and right chan-
nels separately. In volume-control mode, when the first
H
WL
WL
WL
WL
= V
L
, or after 32ms, whichever occurs first
PRESS DN
PRESS UP
PRESS DN
PRESS UP
ONCE
ONCE
ONCE
ONCE
Click-and-Pop Suppression
ORIGINAL BALANCE SEPARATION
WR
WR
WR
WR
BALANCE SEPARATION
MAINTAINED
MAINTAINED
NO CHANGE
Interface
WL
WL
WL
WL
H
TO 2d
= V
9
9
L