X9410
®
Low Noise/Low Power/SPI Bus
Data Sheet
September 19, 2005
FN8193.1
DESCRIPTION
Dual Digitally Controlled Potentiometer
(XDCP™)
The X9410 integrates two digitally controlled
potentiometers (XDCPs) on a monolithic CMOS
integrated circuit.
FEATURES
• Two potentiometers per package
• SPI serial interface
• Register oriented format
The digitally 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 SPI
serial bus interface. Each potentiometer has
associated with it a volatile Wiper Counter Register
(WCR) and four nonvolatile Data Registers (DR0:DR3)
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 through the switches.
Power-up recalls the contents of DR0 to the WCR.
- Direct read/write/transfer wiper positions
- Store as many as four positions per
potentiometer
• Power supplies
- V = 2.7V to 5.5V
CC
- V+ = 2.7V to 5.5V
- V- = -2.7V to -5.5V
• Low power CMOS
- Standby current < 1µA
- High reliability
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.
- Endurance - 100,000 data changes per bit per
register
- Register data retention - 100 years
• 8-bytes of nonvolatile EEPROM memory
• 10kΩ resistor arrays
• Resolution: 64 taps each pot
• 24 Ld SOIC, 24 Ld TSSOP, and 24 Ld plastic DIP
packages
• Pb-free plus anneal available (RoHS compliant)
BLOCK DIAGRAM
VCC
VSS
Pot 0
R0 R1
VH0/RH0
Wiper
Counter
Register
(WCR)
V+
V-
VL0/RL0
R2 R3
HOLD
CS
VW0/RW0
SCK
SO
SI
Interface
and
Control
8
Circuitry
A0
A1
VW1/RW1
Pot 1
Data
WP
R0 R1
R2 R3
V
H1/RH1
Wiper
Counter
Register
(WCR)
Resistor
Array
Pot1
VL1/RL1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1
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XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved
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