MAX5457 Maxim Integrated Products, MAX5457 Datasheet - Page 9

• Manufacturer Part Number: MAX5457
• Description: Stereo Audio Taper Potentiometers
• Manufacturer: Maxim Integrated Products

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.
Figure 4. Balance-Control Operation
H_
H_
L_
L_
(a)
(b)
_______________________________________________________________________________________
VOLUME LEVEL IS SET BY W0
W0
W0
VOLUME LEVEL IS SET
Stereo Audio Taper Potentiometers
W1
W1
Balance Control
PRESS BAL1
PRESS BAL1
ONCE
ONCE
with Pushbutton Interface
W0
W0
Table 2. Wiper Action vs. Pushbutton
Contact Duration
CONTACT DURATION
22.5ms < t ≤ 1s
t < 22.5ms
1s < t ≤ 4s
W1
t > 4s
W1
PRESS BAL1
PRESS BAL1
ONCE
ONCE
No motion (debouncing).
Wiper changes position once.
Wiper changes position
at a rate of 4Hz.
Wiper changes position
at a rate of 16Hz.
VOLUME LEVEL MAINTAINED
VOLUME LEVEL MAINTAINED
W0
W0
BALANCE SHIFTS TO W1
BALANCE SHIFTS TO W1
WIPER ACTION
www.DataSheet4U.com
W1
W1
9