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X9268 Datasheet(PDF) 3 Page - Renesas Technology Corp

Part # X9268
Description  Dual Supply/Low Power/256-Tap/2-Wire Bus Dual Digitally-Controlled (XDCP?? Potentiometers
PDF  22 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

X9268 Datasheet(HTML) 3 Page - Renesas Technology Corp

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X9268
FN8172 Rev.4.00
Page 3 of 22
August 29, 2006
DETAILED FUNCTIONAL DIAGRAM
CIRCUIT LEVEL APPLICATIONS
• Vary the gain of a voltage amplifier
• Provide programmable dc reference voltages for com-
parators 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 cir-
cuits
• 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 sys-
tems
• 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
INTERFACE
AND
CONTROL
CIRCUITRY
A0
SCL
SDA
A1
A2
WP
A3
VCC
VSS
R0 R1
R2 R3
Wiper
Counter
Register
(WCR)
Resistor
Array
Pot 1
R0 R1
R2 R3
Wiper
Counter
Register
(WCR)
Data
8
Pot 0
Power-on
Recall
Power-on
Recall
RH0 RL0RW0
RH1
RL1
RW1
256-taps
50k
 and 100k
V+
V-



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