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Intersil Electronic Components Datasheet

X9418 Datasheet

Dual Digitally Controlled Potentiometers

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®
Data Sheet
X9418
Low Noise/Low Power/2-Wire Bus
October 12, 2006
FN8194.3
Dual Digitally Controlled Potentiometers
(XDCP™)
FEATURES
• Two potentiometers in one package
• 2-wire serial interface
• Register oriented format
—Direct Read/Write/Transfer Wiper Position
—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
—Ideal for Battery Operated Applications
• High reliability
—Endurance–100,000 Data Changes per Bit per
Register
—Register Data Retention–100 years
• 8-bytes of nonvolatile memory
• 2.5kΩ, 10kΩ resistor array
www.DataSheet4U.com Resolution: 64 taps each potentiometer
• 24-pin plastic DIP, 24-lead TSSOP and 24-lead
SOIC packages
• Pb-Free plus anneal available (RoHS compliant)
BLOCK DIAGRAM
VCC
VSS
V+
V-
WP
SCL
SDA
A0
A1
A2
A3
Interface
and
Control
Circuitry
8
Data
DESCRIPTION
The X9418 integrates two digitally controlled
potentiometers (XDCP) on a monolithic CMOS
integrated microcircuit.
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 2-wire
bus interface. Each potentiometer has associated with
it a volatile Wiper Counter Register (WCR) and 4
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.
R0 R1
R2 R3
Wiper
Counter
Register
(WCR)
VH0/RH0
VL0/RL0
VW0/RW0
R0 R1
R2 R3
Wiper
Counter
Register
(WCR)
Resistor
Array
XDCP1
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.


Intersil Electronic Components Datasheet

X9418 Datasheet

Dual Digitally Controlled Potentiometers

No Preview Available !

X9418
Ordering Information
PART NUMBER
X9418WV24*
X9418WV24Z* (Note)
PART MARKING
VCC LIMITS
(V)
POTENTIOMET
ER TEMPERATU
ORGANIZATION RE RANGE
(kΩ) (°C)
PACKAGE
PKG. DWG. #
X9418WV
5 ±10%
10
0 to +70 24 Ld TSSOP (4.4MM)
MDP0044
X9418WV Z
0 to +70 24 Ld TSSOP (4.4MM) (Pb-free) MDP0044
X9418WP24I-2.7
X9418WP G
2.7 to 5.5
10
-40 to +85 24 Ld PDIP
E24.6
X9418WS24I-2.7
X9418WS G
-40 to +85 24 Ld SOIC (300MIL)
M24.3
X9418WS24IZ-2.7 (Note) X9418WS ZG
-40 to +85 24 Ld SOIC (300MIL) (Pb-free) M24.3
X9418WV24-2.7*
X9418WV F
X9418WV24Z-2.7* (Note) X9418WV ZF
X9418WV24I-2.7
X9418WV G
0 to +70
0 to +70
-40 to +85
24 Ld TSSOP (4.4MM)
MDP0044
24 Ld TSSOP (4.4MM) (Pb-free) MDP0044
24 Ld TSSOP (4.4MM)
MDP0044
X9418WV24IZ-2.7 (Note) X9418WV ZG
X9418YS24-2.7
X9418YS F
X9418YS24Z-2.7 (Note) X9418YS ZF
-40 to +85 24 Ld TSSOP (4.4MM) (Pb-free) MDP0044
2.5 0 to +70 24 Ld SOIC (300MIL)
M24.3
0 to +70 24 Ld SOIC (300MIL) (Pb-free) M24.3
X9418YS24I-2.7
X9418YS G
X9418YS24IZ-2.7 (Note) X9418YS ZG
X9418YV24I-2.7*
X9418YV G
-40 to +85
-40 to +85
-40 to +85
24 Ld SOIC (300MIL)
M24.3
24 Ld SOIC (300MIL) (Pb-free) M24.3
24 Ld TSSOP (4.4MM)
MDP0044
X9418YV24IZ-2.7* (Note) X9418YV ZG
-40 to +85 24 Ld TSSOP (4.4MM) (Pb-free) MDP0044
*Add "T1" suffix for tape and reel.
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are
MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
PIN DESCRIPTIONS
Potentiometer Pins
Host Interface Pins
Serial Clock (SCL)
The SCL input is used to clock data into and out of the
X9418.
Serial Data (SDA)
SDA is a bidirectional pin used to transfer data into
and out of the device. It is an open drain output and
may be wire-ORed with any number of open drain or
open collector outputs. An open drain output requires
the use of a pull-up resistor. For selecting typical
values, refer to the guidelines for calculating typical
values on the bus pull-up resistors graph.
Device Address (A0 - A3)
The Address inputs are used to set the least
significant 4 bits of the 8-bit slave address. A match in
the slave address serial data stream must be made
with the Address input in order to initiate
communication with the X9418. A maximum of 16
devices may occupy the 2-wire serial bus.
VH/RH (VH0/RH0 - VH1/RH1), VL/RL (VL0/RL0 - VL1/RL1)
The VH/RH and VL/RL inputs are equivalent to the
terminal connections on either end of a mechanical
potentiometer.
VW/RW (VW0/RW0 - VW1/RW1)
The wiper outputs are equivalent to the wiper output of
a mechanical potentiometer.
Hardware Write Protect Input (WP)
The WP pin when low prevents nonvolatile writes to
the Data Registers.
Analog Supplies V+, V-
The Analog Supplies V+, V- are the supply voltages
for the XDCP analog section.
2 FN8194.3
October 12, 2006


Part Number X9418
Description Dual Digitally Controlled Potentiometers
Maker Intersil Corporation
Total Page 20 Pages
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