MAX5456(2012) Ver la hoja de datos (PDF) - Maxim Integrated
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MAX5456 Datasheet PDF : 18 Pages
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MAX5456/MAX5457
Stereo Audio Taper Potentiometers
with Pushbutton Interface
Balance Control
In balance-control mode, the MAX5456/MAX5457
adjust the balance between channel 0 and channel 1
while maintaining the set volume. For example, if the
volume of channel 0 equals the volume of channel 1,
forcing the balance towards channel 1 increases the
attenuation of channel 0 (Figure 4a). If channel 1 is at a
higher attenuation than channel 0, adjusting the bal-
ance to channel 1 moves channel 1’s wiper up to the
same wiper position as channel 0 before attenuating
channel 0 (Figure 4b).
To control the wiper quickly with a logic signal, main-
tain pulses at least 22.5ms wide and separated by at
least 40ms.
Table 2. Wiper Action vs. Pushbutton
Contact Duration
CONTACT DURATION
t < 22.5ms
22.5ms < t ≤ 1s
1s < t ≤ 4s
WIPER ACTION
No motion (debouncing).
Wiper changes position once.
Wiper changes position
at a rate of 4Hz.
t > 4s
Wiper changes position
at a rate of 16Hz.
H_
(a)
VOLUME LEVEL IS SET
W0
W1
W0
PRESS BAL1
ONCE
L_
H_
(b)
VOLUME LEVEL IS SET BY W0
W0
W1
W0
PRESS BAL1
ONCE
L_
Figure 4. Balance-Control Operation
VOLUME LEVEL MAINTAINED
BALANCE SHIFTS TO W1
W1
W0
W1
PRESS BAL1
ONCE
VOLUME LEVEL MAINTAINED
BALANCE SHIFTS TO W1
W1
W0
W1
PRESS BAL1
ONCE
Maxim Integrated
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