X9421WV14IZ Datasheet, PDF (3/20 Pages) Intersil Corporation – Single Voltage Potentiometer

Detailed Functional Diagrams
V_CC
HOLD
CS
SCK
SO
SI
A0
WP
CONTROL
INTERFACE
AND
CONTROL
CIRCUITRY
D ATA
X9421
POWER-ON RECALL
DR0 _DR1
WIPER
COUNTER
REGISTER
DR2 DR3 (WCR)
10kΩ
64-taps
R_H/V_H
R_L/V_L
R_W/V_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
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
3
FN8196.4
January 14, 2009