x9268us24c7979 Intersil Corporation, x9268us24c7979 Datasheet - Page 3

• Manufacturer Part Number: x9268us24c7979
• Description: Dual Digitally Controlled Xdcp? Potentiometers
• Manufacturer: Intersil Corporation

DETAILED FUNCTIONAL DIAGRAM
CIRCUIT LEVEL APPLICATIONS
• Vary the gain of a voltage amplifier
• Provide programmable dc reference voltages for
• Control the volume in audio circuits
• Trim out the offset voltage error in a voltage ampli-
• Set the output voltage of a voltage regulator
• Trim the resistance in Wheatstone bridge circuits
• Control the gain, characteristic frequency and
• Set the scale factor and zero point in sensor signal
• Vary the frequency and duty cycle of timer ICs
• Vary the dc biasing of a pin diode attenuator in RF
• Provide a control variable (I, V, or R) in feedback
comparators and detectors
fier circuit
Q-factor in filter circuits
conditioning circuits
circuits
circuits
SDA
SCL
WP
A3
A2
A1
A0
3
INTERFACE
CIRCUITRY
CONTROL
AND
V
CC
V
SS
Data
V-
8
V
+
X9268
R
R
Power-on
Recall
R
R
Power-on
Recall
0
2
0
2
R
R
R
R
1
3
1
3
SYSTEM LEVEL APPLICATIONS
• Adjust the contrast in LCD displays
• Control the power level of LED transmitters in
• Set and regulate the DC biasing point in an RF
• Control the gain in audio and home entertainment
• Provide the variable DC bias for tuners in RF wire-
• Set the operating points in temperature control
• Control the operating point for sensors in industrial
• Trim offset and gain errors in artificial intelligent
Register
Counter
Register
Counter
(WCR)
(WCR)
Wiper
communication systems
power amplifier in wireless systems
systems
less systems
systems
systems
systems
Wiper
Resistor
Array
Pot 1
Pot 0
50kΩ and 100kΩ
256-taps
R
R
H0
L1
R
R
H1
L0
R
R
W0
W1
August 29, 2006
FN8172.4