ISL22102 Datasheet, PDF (9/11 Pages) Intersil Corporation – 32 Tap, Push-button, Dual Audio Logarithmic Potentiometer with Buffer Amplifiers and Audio Detection

ISL22102
TABLE 3. WIPER TAP POSITION vs ATTENUATION (Continued)
TAP POSITION
ATTENUATION
25
-50dB
26
-52dB
27
-56dB
28
-60dB
29
-64dB
30
-68dB
31
-72dB
32
MUTE (-90dB)
Once an UP, DN or MUTE button has been validly pushed,
the left and right inputs are examined for Zero Amplitude
Crossing. When either audio input exhibits a zero crossing
prior to 32ms, that command is immediately applied to
appropriate wiper. If the zero crossing does not occur before
the end of 32ms, the command is executed at the end of
32ms period. Zero crossing determines for each channel
independently.
There is a 40ms lockout time after any of the UP, DN or
MUTE button has been validly pushed, when any new
command is ignored. If two or more buttons are pressed
simultaneously, all commands are ignored upon release of
ALL buttons.
Typical Application Diagram
VCC
AVCC
VB
VB
R_TH
LEFT_IN
RIGHT_IN
VB
V_TH
1µF
100nF
CB
HPA
HPB
UP
DN
MUTE
LEFT_OUT
RIGHT_OUT
TO POWER AMPLIFIER
FLAG
SB
VCC*
D2
D1
D0
*FLAG LOW OUTPUT DELAY IS 240s
9
FN6788.1
January 14, 2010