MAX5486EUG+T Maxim Integrated Products, MAX5486EUG+T Datasheet - Page 11

• Manufacturer Part Number: MAX5486EUG+T
• Description: IC CNTRL VOL STEREO 24TSSOP
• Manufacturer: Maxim Integrated Products
• Type: Stereo Audio Volume Controlr

Specifications of MAX5486EUG+T

• Applications: Automotive Systems, Desktop Audio, Set-Top Boxes
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 3 shows the LED display as the wipers transition
through various attenuation levels.
A PWM circuit interpolates the high-resolution 32 steps
between the five LEDs over the volume range from 0dB
to -54dB. This feature provides visible indication for the
attenuation levels from 0dB to -54dB. For example,
LED4 brightness level decreases progressively with
each -2dB step from 0dB to -8dB. PWM is disabled in
the range -56dB to mute.
In balance-control mode, only one LED is on at a time
to indicate the current balance setting. Figure 5 shows
the LEDs display for the current balance setting. When
LED2 is on, the display indicates that the channels are
centered or balanced at a set volume level. When LED4
turns on, the balance shifts completely toward the right
channel and the left channel becomes fully attenuated.
The MAX5486 does not respond to simultaneous button
pushes. Additionally, a 16ms blocking period affects all
other inputs when releasing any input that was forced low.
Table 3. LED Settings in Volume Mode
-54dB to mute (-90dB)
VOLUME POSITION
-10dB to -18dB
-20dB to -28dB
-30dB to -38dB
-40dB to -52dB
0dB to -8dB
______________________________________________________________________________________
Stereo Volume Control with Pushbutton
Multiple Button Pushes
LED0
1
1
1
1
1
0
LED1
VOLUME LED OUTPUTS ( 1 = LED IS ON)
1
1
1
1
0
0
The MAX5486 does not respond to any logic input until
the blocking period ends. If multiple-control buttons are
pressed, all wiper-control connections must be released
before the device responds to further commands.
The Typical Operating Circuit shows a typical volume/
balance application circuit using the MAX5486 in a sin-
gle-supply configuration. The internally generated BIAS
voltage eliminates the need for external op amps, and
the wipers have internal low-power buffers for low dis-
tortion. Connect the W_ outputs of the MAX5486 to the
left and right inputs of a stereo audio amplifier, such as
the MAX9761. The pushbutton potentiometers attenu-
ate the input signals. Use the MODE input to switch
between volume-control and balance-control modes.
LED2
1
1
1
0
0
0
Applications Information
LED3
1
1
0
0
0
0
Interface
LED4
1
0
0
0
0
0
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