MAX5407EKA MAXIM [Maxim Integrated Products], MAX5407EKA Datasheet - Page 5

• Manufacturer Part Number: MAX5407EKA
• Description: 32-Tap Audio Logarithmic Taper Digital Potentiometer
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 1. Serial Interface Timing Diagram, Increment Mode
Figure 2. Serial Interface Timing Diagram, Decrement Mode
The MAX5407 has two modes of operation when the seri-
al interface is active: increment and decrement mode.
The serial interface is only active when CS is high.
The CS and U/D inputs control the position of the wiper
along the resistor array. When CS transitions from low
to high, the part will go into increment mode if U/D is
NOTE: W IS NOT A DIGITAL SIGNAL. IT REPRESENTS THE WIPER TRANSITIONING.
NOTE: W IS NOT A DIGITAL SIGNAL. IT REPRESENTS THE WIPER TRANSITIONING.
U/D
CS
U/D
CS
W
W
_______________________________________________________________________________________
Digital Interface Operation
Detailed Description
t
t
CU
CU
32-Tap Audio Logarithmic Taper
t
t
CI
CI
t
IW
high and into decrement mode if U/D is low. Once the
mode is set, the device will remain in that mode until CS
goes low again. A low-to-high transition at the U/D pin
will increment or decrement the wiper position depend-
ing on the mode (Figures 1 and 2).
When the CS input transitions to low (serial interface
inactive), the value of the counter is stored and the
wiper position is maintained.
Digital Potentiometer
t
t
IL
IH
t
IW
t
IH
t
IL
t
IC
t
IC
5