X93154 INTERSIL [Intersil Corporation], X93154 Datasheet - Page 6

• Manufacturer Part Number: X93154
• Description: Digitally Controlled Potentiometer
• Manufacturer: INTERSIL [Intersil Corporation]

Mode Selection
This procedure allows the system to always power-up to a
preset value stored in nonvolatile memory; then during
system operation minor adjustments could be made. The
adjustments might be based on user preference, system
parameter changes due to temperature drift, or other system
trim requirements.
The state of U/D may be changed while CS remains LOW.
This allows the host system to enable the device and then
move the wiper up and down until the proper trim is attained.
Low Voltage High Impedance Instrumentation Amplifier
CS
H
L
L
INC
H
X
L
L
L
U/D
H
H
X
X
X
L
L
Wiper Up
Wiper Down
Store Wiper Position
Standby Current
No Store, Return to Standby
Wiper Up (not recommended)
Wiper Down (not recommended)
V
+
IN
-
6
10K
10K
MODE
I
X93154 (R
-
+
+
-
3.3V
V
U1A
U1B
R
50K
50K
TOTAL
)
X93154
Two terminal variable resistor.
variable current
10K
10K
Symbol Table
Applications Information
Electronic digitally controlled (XDCP) potentiometers provide
three powerful application advantages; (1) the variability and
reliability of a solid-state potentiometer (2) the flexibility of
computer-based digital controls, and (3) the retentivity of
nonvolatile memory used for the storage of multiple
potentiometer settings or data.
WAVEFORM
50k
+
-
U1C
50K
Gain =
U1 = LT1467
INPUTS
Must be
steady
May change
from Low to
High
May change
from High to
Low
Don’t Care:
Changes
Allowed
N/A
50K
10K
(
V
1 +
OUT
R
TOTAL
50K
OUTPUTS
Will be
steady
Will change
from Low to
High
Will change
from High to
Low
Changing:
State Not
Known
Center Line
is High
Impedance
)
October 5, 2005
FN8180.2