X9429 Datasheet, PDF (1/21 Pages) Intersil Corporation – Single Digitally Controlled Potentiometer

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Data Sheet
X9429
Low Noise/Low Power/2-Wire Bus
October 19, 2005
FN8248.2
Single Digitally Controlled Potentiometer
(XDCP™)
FEATURES
• Single Voltage Potentiometer
• 64 Resistor Taps
• 2-wire Serial Interface for Write, Read, and
Transfer Operations of the Potentiometer
• Wiper Resistance, 150Ω Typical at 5V
• Non-Volatile Storage of Multiple Wiper Positions
• Power-on Recall. Loads Saved Wiper Position
on Power-up.
• Standby Current < 5µA Max
• V_CC : 2.7V to 5.5V Operation
• 2.5kΩ, 10kΩ Total Pot Resistance
• Endurance: 100, 000 Data Changes per Bit per
Register
• 100 yr. Data Retention
• 14 Ld TSSOP, 16 Ld SOIC
• Low Power CMOS
• Pb-Free Plus Anneal Available (RoHS Compliant)
BLOCK DIAGRAM
DESCRIPTION
The X9429 integrates a single digitally controlled
potentiometer (XDCP) on a monolithic CMOS
integrated circuit.
The digital controlled potentiometer is implemented
using 63 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 2-wire
bus interface. The potentiometer has associated with it
a volatile Wiper Counter Register (WCR) and a 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.
V_CC
2-wire
bus
interface
address
data
status
Bus
Interface &
Control
write
read
transfer
inc / dec
control
Power-on Recall
Wiper Counter
Register (WCR)
Data Registers
4 Bytes
V_H/R_H
wiper
10kΩ
64-taps
POT
V_SS
V_L/R_L ^VW^/RW
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved
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