X9118 Datasheet, PDF (2/20 Pages) Intersil Corporation – Dual Suply/Low Power/1024-Tap/2-Wire Bus

DETAILED FUNCTIONAL DIAGRAM
X9118
V_CC
V+
SCL
SDA
A1
A0
WP
Interface
and
Control
Circuitry
Data
Control
Power On
Recall
DR0 DR1
DR2 DR3
Wiper
Counter
Register
(WCR)
R_H
100kΩ
1024-taps
R_L
R_W
V_SS
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
V-
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
2
FN8161.1
March 25, 2005