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X9110 Datasheet Preview

X9110 Datasheet

Single Digitally-Controlled (XDCP) Potentiometer

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APPLICATION NOTES AND DEVELOPMENT SYSTEM
AVAILABLE
AN99 • AN115 • AN124 •AN133 • AN134 • AN135
Dual Supply / Low Power / 1024-tap / SPI bus
Preliminary Information
X9110
Single Digitally-Controlled (XDCP) Potentiometer
FEATURES
• 1024 Resistor Taps – 10-Bit Resolution
• SPI Serial Interface for write, read, and transfer
operations of the potentiometer
• Wiper Resistance, 40Typical @ 5V
• Four Non-Volatile Data Registers
• Non-Volatile Storage of Multiple Wiper Positions
• Power On Recall. Loads Saved Wiper Position on
Power Up.
• Standby Current < 3µA Max
• System VCC: 2.7V to 5.5V Operation
• Analog V+/V-: -5V to +5V
• 100KEnd to End Resistance
• 100 yr. Data Retention
• Endurance: 100, 000 data changes per bit per
register
• 14-Lead TSSOP, xx-Lead XBGA
• Dual Supply Version of the X9111
• Low Power CMOS
DESCRIPTION
The X9110 integrates a single digitally controlled
potentiometer (XDCP) on a monolithic CMOS
integrated circuit.
The digital controlled potentiometer is implemented
using 1023 resistive elements in a series array.
Between each element are tap points connected to the
wiper terminal through switches. The position of the
wiper on the array is controlled by the user through the
SPI bus interface. The potentiometer has associated
with it a volatile Wiper Counter Register (WCR) and
four non-volatile Data Registers that can be directly
written to and read by the user. The contents of the
WCR controls the position of the wiper on the resistor
array though the switches. Powerup recalls the
contents of the default data register (DR0) to the WCR.
The XDCP can be used as a three-terminal
potentiometer or as a two terminal variable resistor in
a wide variety of applications including control,
parameter adjustments, and signal processing.
FUNCTIONAL DIAGRAM
VCC
RH V+
SPI
Bus
Interface
Address
Data
Status
Bus
Interface &
Control
Write
Read
Transfer
Control
Power On Recall
Wiper Counter
Register (WCR)
Data Registers
(DR0-DR3)
Wiper
100K
1024-taps
POT
VSS NC NC
RW RL
V-
REV 1.1.4 11/13/00
www.xicor.com
Characteristics subject to change without notice. 1 of 21




Xicor

X9110 Datasheet Preview

X9110 Datasheet

Single Digitally-Controlled (XDCP) Potentiometer

No Preview Available !

X9110 – Preliminary Information
DETAILED FUNCTIONAL DIAGRAM
VCC
V+
HOLD
CS
SCK
SO
SI
A0
WP
Interface
and
Control
Circuitry
Data
Control
Power On
Recall
DR0 DR1
DR2 DR3
Wiper
Counter
Register
(WCR)
100K
1024-taps
RH
RL
RW
VSS V-
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
REV 1.1.4 11/13/00
www.xicor.com
Characteristics subject to change without notice. 2 of 21


Part Number X9110
Description Single Digitally-Controlled (XDCP) Potentiometer
Maker Xicor
Total Page 21 Pages
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