MAX5440EAG+ Maxim Integrated Products, MAX5440EAG+ Datasheet - Page 8

• Manufacturer Part Number: MAX5440EAG+
• Description: IC CNTRL VOL STEREO 24-SSOP
• Manufacturer: Maxim Integrated Products
• Type: Stereo Audio Volume Controlr

Specifications of MAX5440EAG+

• Applications: Automotive Systems, Desktop Audio, Set-Top Boxes
• Mounting Type: Surface Mount
• Package / Case: 24-SSOP
• Number Of Pots: Dual
• Taps Per Pot: 32
• Resistance: 1 Ohms
• Wiper Memory: Volatile
• Digital Interface: Serial
• Operating Supply Voltage: 2.7 V to 5.5 V
• Supply Current: 1.4 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Description/function: Stereo Volume Control with Rotary Encoder Interface
• Mounting Style: SMD/SMT
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Temperature Coefficient: 35 PPM / C
• Tolerance: 30 %
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

In volume-control mode, the MAX5440’s wipers move
simultaneously, maintaining the balance separation
between each wiper
When either wiper reaches the maximum tap position
(position closest to H_), further commands to increase
the volume are ignored. Balance separation is main-
tained in the maximum volume configuration
When either wiper reaches the minimum tap position
(position closest to L_), further commands to decrease
Stereo Volume Control
with Rotary Encoder Interface
Figure 2. Volume-Control Operation
8
FROM C
_______________________________________________________________________________________
H_
L_
H_
L_
H_
L_
H_
L_
(Figure
W0
W0
W0
W0
2a).
W1
W1
W1
W1
Volume Control
ROTATE CCW
ROTATE CW
ROTATE CW
ROTATE CW
(Figure
TWICE
ONCE
ONCE
ONCE
2b).
W0
W0
W0
W0
the volume adjust the other wiper until it also reaches
the minimum tap position
Increasing the volume from this minimum position
restores the original balance separation of the wipers
(Figure
When both wipers are in the tap 31 position (-62dB
attenuation), further decreasing rotations place the
wipers in the mute position (see
encoder to a lower attenuation or a pulse to MUTE
returns the wipers to tap 31.
a
b
c
d
W1
W1
W1
W1
2d).
ROTATE CCW
ROTATE CCW
ROTATE CW
ROTATE CW
ONCE
ONCE
(Figure
ORIGINAL BALANCE SEPARATION
W0
W0
W0
W0
BALANCE SEPARATION
MAINTAINED
MAINTAINED
NO CHANGE
2c).
Table
1). Rotating the
W1
W1
W1
W1
TO D