isl23328 Intersil Corporation, isl23328 Datasheet - Page 17

• Manufacturer Part Number: isl23328
• Description: Dual, 128-tap, Low Voltage Digitally Controlled Potentiometer Xdcp™
• Manufacturer: Intersil Corporation

Applications Information
V
V
In a case where turning V
recommended to ground the V
Grounding the V
other devices on the same bus. It is good practice to put a 1µF
cap in parallel to 0.1µF as close to the V
V
It is recommended to put a 1µF capacitor in parallel with 0.1µF
decoupling capacitor close to the V
Wiper Transition
When stepping up through each tap in voltage divider mode,
some tap transition points can result in noticeable voltage
transients, or overshoot/undershoot, resulting from the sudden
transition from a very low impedance “make” to a much higher
impedance “break” within a short period of time (<1µs). There
are several code transitions such as 0Fh to 10h, 1Fh to 20h,...,
6Fh to 7Fh, which have higher transient glitch. Note, that all
switching transients will settle well within the settling time as
stated in the datasheet. A small capacitor can be added
externally to reduce the amplitude of these voltage transients.
However, that will also reduce the useful bandwidth of the circuit,
thus may not be a good solution for some applications. It may be
a good idea, in that case, to use fast amplifiers in a signal chain
for fast recovery.
LOGIC
LOGIC
CC
Requirements and Placement
should be powered continuously during normal operation.
Requirements
LOGIC
pin or both V
LOGIC
17
LOGIC
OFF is necessary, it is
LOGIC
CC
pin of the ISL23328.
pin.
LOGIC
and V
pin as possible.
CC
does not affect
ISL23328
August 19, 2011
FN7902.0