Manual

MAX5440
Stereo Volume Control
with Rotary Encoder Interface
4 _______________________________________________________________________________________
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
-70
-60
-40
-50
-20
-10
-30
0
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ATTENUATION vs. TAP POSITION
MAX5440 toc01
TAP POSITION
ATTENUATION (dB)
-0.25
-0.15
-0.20
-0.05
-0.10
0.05
0
0.10
-40 10-15 35 60 85
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE
MAX5440 toc02
TEMPERATURE (
°
C)
END-TO-END RESISTANCE CHANGE (%)
1.38
1.41
1.40
1.39
1.42
1.43
1.44
1.45
1.46
1.47
1.48
-40 10-15 35 60 85
TOTAL SUPPLY CURRENT
vs. TEMPERATURE
MAX5440 toc03
TEMPERATURE (
°
C)
TOTAL SUPPLY CURRENT (mA)
V
LOGIC
= V
DD
= 5.5V
WIPER
TRANSITION
FROM -2dB
TO -4dB
20ms/div
WIPER SWITCHING TRANSIENT
MAX5440 toc04
RENCODEA
RENCODEB
51ms
0
20
10
40
30
60
50
70
90
80
100
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WIPER-TO-END TERMINAL VOLTAGE
vs. TAP POSITION
MAX5440 toc05
TAP POSITION
NOMINAL END-TO-END VOLTAGE (%V
HL
)
V
HW
V
WL
-2.8
-2.0
-2.4
-0.4
-0.8
-1.2
-1.6
0.8
0.4
0
0.01 10.1 10 100 1000
FREQUENCY RESPONSE
MAX5440 toc06
FREQUENCY (kHz)
RESPONSE (dB)
V
H_
= 2.5 ±1V
RMS
, V
L_
= 2.5V, C
L_
= 33pF
W_ SET TO 0dB
-8.8
-8.0
-8.4
-6.4
-6.8
-7.6
-7.2
-5.6
-6.0
-5.2
0.01 10.1 10 100 1000
FREQUENCY RESPONSE
MAX5440 toc07
FREQUENCY (kHz)
RESPONSE (dB)
W_ SET TO -6dB
V
H_
= 2.5 ±1V
RMS
, V
L_
= 2.5V, C
L_
= 33pF
0.001
0.01
0.1
0.001 0.10.01 1 10 100
THD+N vs. FREQUENCY
MAX5440 toc08
FREQUENCY (kHz)
W_ SET AT -2dB
THD+N (%)
V
DD
= 2.5V
V
SS
= -2.5V
L_ = V
MIDBIAS
H_ = V
MIDBIAS
+ 1V
RMS
W_ SET AT -6dB
W_ SET AT 0dB
0.001
0.01
0.1
0.001 0.10.01 1 10 100
THD+N vs. FREQUENCY
MAX5440 toc09
FREQUENCY (kHz)
THD+N (%)
V
DD
= 5.0V
V
SS
= GND
L_ = V
MIDBIAS
H_ = V
MIDBIAS
+ 1V
RMS
W_ SET AT -2dB
W_ SET AT -6dB
W_ SET AT 0dB