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X9438WS24I

Description
DUAL 10K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 64 POSITIONS, PDSO24, PLASTIC, SOIC-24
CategoryAnalog mixed-signal IC    converter   
File Size677KB,18 Pages
ManufacturerIntersil ( Renesas )
Websitehttp://www.intersil.com/cda/home/
Download Datasheet View All

X9438WS24I Overview

DUAL 10K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 64 POSITIONS, PDSO24, PLASTIC, SOIC-24

X9438
NOT RECOMMENDED FOR NEW DESIGNS
NO RECOMMENDED REPLACEMENT
contact our Technical Support Center at
1-888-INTERSIL or www.intersil.com/tsc
DATASHEET
FN8199
Rev 0.00
March 11, 2005
Programmable Analog Dual Digitally Controlled Potentiometer (XDCP™) with
Operational Amplifier
FEATURES
Two CMOS voltage operational amplifiers
Two digitally controlled potentiometers
Can be combined or used separately
Amplifiers:
—Low voltage operation
—V+/V- = ±2.7V to ±5.5V
—Rail-to-rail CMOS performance
—1MHz gain bandwidth product
• Digitally controlled potentiometers
—Dual 64 tap potentiometers
—R
total
= 10k
—2-wire serial interface
—V
CC
= 2.7V to 5.5V
DESCRIPTION
The X9438 is a monolithic CMOS IC that incorporates
two operational amplifiers and two nonvolatile digitally
controlled potentiometers. The amplifiers are CMOS
differential input voltage operational amplifiers with
near rail-to-rail outputs. All pins for the two amplifiers
are brought out of the package to allow combining
them with the potentiometers, or using them as com-
plete stand-alone amplifiers.
The digitally controlled potentiometers consist of a
series string of 63 polycrystalline resistors that behave
as standard integrated circuit resistors. The two-wire
serial port, common to both pots, allows the user to
program the connection of the wiper output to any of
the resistor nodes in the series string. The wiper posi-
tion is saved in the on board E2 memory to allow for
nonvolatile restoration of the wiper position.
A wide variety of applications can be implemented
using the potentiometers and the amplifiers. A typical
application is to implement the amplifier as a wiper buf-
fer in circuits that use the potentiometer as a voltage
reference. The potentiometer can also be combined
with the amplifier yielding a digitally programmable gain
amplifier or programmable current source.
BLOCK DIAGRAM
V
CC
R
W0
R
H0
R
L0
V+
SCL
SDA
A3
A2
A1
A0
WP
Control and
Memory
WCR0
V
NI0
+
V
OUT0
V
INV0
V
NI1
V
OUT1
V
INV1
+
WCR1
V
SS
R
W1
R
L1
R
H1
V-
FN8199 Rev 0.00
March 11, 2005
Page 1 of 18
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