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X9259TB24-2.7 Datasheet(PDF) 2 Page - Xicor Inc.

Part # X9259TB24-2.7
Description  Quad Digitally-Controlled (XDCP) Potentiometers
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Manufacturer  XICOR [Xicor Inc.]
Direct Link  http://www.xicor.com
Logo XICOR - Xicor Inc.

X9259TB24-2.7 Datasheet(HTML) 2 Page - Xicor Inc.

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X9259
Characteristics subject to change without notice.
2 of 25
REV 1.2.3 4/30/02
www.xicor.com
DETAILED FUNCTIONAL DIAGRAM
INTERFACE
AND
CONTROL
CIRCUITRY
A0
SCL
SDA
A1
A2
WP
A3
Wiper
Counter
Register
(WCR)
Resistor
Array
Pot 1
RH1
RL1
Wiper
Counter
Register
(WCR)
RH0 RL0
Data
8
RW0
Resistor
Array
RH2
RL2
RW2
Resistor
Array
RH3
RL3
RW3
Wiper
Counter
Register
(WCR)
Wiper
Counter
Register
(WCR)
Pot 3
Pot 2
Pot 0
VCC
VSS
256-taps
50K
Ω and 100KΩ
Power On
Recall
Power On
Recall
Power On
Recall
Power On
Recall
DR0 DR1
DR2 DR3
DR0 DR1
DR2 DR3
DR0 DR1
DR2 DR3
DR0 DR1
DR2 DR3
RW1
CIRCUIT LEVEL APPLICATIONS
• Vary the gain of a voltage amplifier
• Provide programmable dc reference voltages for
comparators and detectors
• Control the volume in audio circuits
• Trim out the offset voltage error in a voltage amplifier
circuit
• Set the output voltage of a voltage regulator
• Trim the resistance in Wheatstone bridge circuits
• Control the gain, characteristic frequency and
Q-factor in filter circuits
• Set the scale factor and zero point in sensor signal
conditioning circuits
• Vary the frequency and duty cycle of timer ICs
• Vary the dc biasing of a pin diode attenuator in RF
circuits
• Provide a control variable (I, V, or R) in feedback
circuits
SYSTEM LEVEL APPLICATIONS
• Adjust the contrast in LCD displays
• Control the power level of LED transmitters in
communication systems
• Set and regulate the DC biasing point in an RF power
amplifier in wireless systems
• Control the gain in audio and home entertainment
systems
• Provide the variable DC bias for tuners in RF wireless
systems
• Set the operating points in temperature control
systems
• Control the operating point for sensors in industrial
systems
• Trim offset and gain errors in artificial intelligent
systems


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