Controlled Potentiometers. X9418 Datasheet

X9418 Datasheet PDF, Equivalent


Part Number

X9418

Description

Dual Digitally Controlled Potentiometers

Manufacture

Xicor

Total Page 21 Pages
PDF Download
Download X9418 Datasheet PDF


X9418 Datasheet
APPLICATION NOTES
AVAILABLE
AN99 • AN115 • AN120 • AN124 • AN133 • AN134 • AN135
Low Noise/Low Power/2-Wire Bus
X9418
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
• 2.5K, 10Kresistor array
• Resolution: 64 taps each potentiometer
• 24-pin plastic DIP, 24-lead TSSOP and 24-lead
SOIC packages
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.
BLOCK DIAGRAM
VCC
VSS
V+
V-
WP
SCL
SDA
A0
A1
A2
A3
Interface
and
Control
Circuitry
8
Data
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
REV 1.1.5 7/23/02
www.xicor.com
Characteristics subject to change without notice. 1 of 21

X9418 Datasheet
X9418
PIN DESCRIPTIONS
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 (A0A3)
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.
Potentiometer Pins
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.
PIN CONFIGURATION
VCC
RL0/VL0
RH0/VH0
RW0/VW0
A2
WP
SDA
A1
RL1/VL1
RH1/VH1
RW1/VW1
VSS
DIP/SOIC
1 24
2 23
3 22
4 21
5 20
6
7
X9418 19
18
8 17
9 16
10 5
11 14
12 13
V+
NC
NC
NC
A0
NC
A3
SCL
NC
NC
NC
V-
SDA
A1
RL1/VL1
RH1/VH1
RW1/VW1
VSS
NC
NC
NC
V-
SCL
A3
TSSOP
1 24
2 23
3 22
4 21
5 20
6
7
X9418 19
18
8 17
9 16
10 15
11 14
12 13
WP
A2
VW0/RW0
VH0/RH0
VL0/RL0
VCC
NC
NC
NC
V+
A0
NC
PIN NAMES
Symbol
SCL
SDA
A0-A3
VH0/RH0–VH1/RH1,
VL0/RL0–VL1/RL1
VW0/RW0–VW1/RW1
WP
V+,V-
VCC
VSS
NC
Description
Serial Clock
Serial Data
Device Address
Potentiometer Pins
(terminal equivalent)
Potentiometer Pins
(wiper equivalent)
Hardware Write Protection
Analog Supplies
System Supply Voltage
System Ground
No Connection
REV 1.1.5 7/23/02
www.xicor.com
Characteristics subject to change without notice. 2 of 21


Features Datasheet pdf APPLICATION NOTES A V A I L A B L E AN99 • AN115 • AN120 • AN124 • AN13 3 • AN134 • AN135 Low Noise/Low Po wer/2-Wire Bus X9418 Dual Digitally Co ntrolled Potentiometers (XDCP™) FEATU RES • Two potentiometers in one packa ge • 2-wire serial interface • Regi ster oriented format —Direct Read/Wri te/Transfer Wiper Position —Store as many as Four Positions per Potentiomete r • Power supplies —VCC = 2.7V to 5 .5V —V+ = 2.7V to 5.5V —V– = –2 .7V to –5.5V • Low power CMOS —St andby current < 1µA —Ideal for Batte ry Operated Applications • High relia bility —Endurance–100,000 Data Chan ges per Bit per Register —Register Da ta Retention–100 years • 8-bytes of nonvolatile memory • 2.5KΩ, 10KΩ resistor array • Resolution: 64 taps each potentiometer • 24-pin plastic DIP, 24-lead TSSOP and 24-lead SOIC pac kages DESCRIPTION The X9418 integrates two digitally controlled potentiometers (XDCP) on a monolithic CMOS integrated microcircuit. The digitally controlled potentiometer is implemented using 63 resistive ele.
Keywords X9418, datasheet, pdf, Xicor, Dual, Digitally, Controlled, Potentiometers, 9418, 418, 18, X941, X94, X9, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)