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X9410_06 Datasheet, PDF (1/21 Pages) Intersil Corporation – Dual Digitally Controlled Potentiometer
®
Data Sheet
X9410
Low Noise/Low Power/SPI Bus
October 12, 2006
FN8193.2
Dual Digitally Controlled Potentiometer
(XDCP™)
FEATURES
• Two potentiometers per package
• SPI serial interface
• Register oriented format
- Direct read/write/transfer wiper positions
- Store as many as four positions per
potentiometer
• Power supplies
- VCC = 2.7V to 5.5V
- V+ = 2.7V to 5.5V
- V- = -2.7V to -5.5V
• Low power CMOS
- Standby current < 1µA
- High reliability
- 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
V+
V-
HOLD
CS
SCK
SO
SI
A0
A1
WP
Interface
and
Control
Circuitry
8
Data
DESCRIPTION
The X9410 integrates two digitally controlled
potentiometers (XDCPs) on a monolithic CMOS
integrated circuit.
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.
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.
Pot 0
R0 R1
R2 R3
Wiper
Counter
Register
(WCR)
VH0/RH0
VL0/RL0
VW0/RW0
Pot 1
R0 R1
R2 R3
Wiper
Counter
Register
(WCR)
Resistor
Array
Pot1
VW1/RW1
VH1/RH1
VL1/RL1
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. 2005-2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.