廬
ISL95311
Digitally Controlled Potentiometer (XDCP鈩?
Data Sheet
May 6, 2005
FN8084.0
Terminal Voltage 0V to 13.2V, 128 Taps I
2
C
Interface
The Intersil ISL95311 is a digitally controlled potentiometer
(XDCP). The device consists of a resistor array, wiper
switches, a control section, and nonvolatile memory. The
wiper position is controlled by an I
2
C interface.
The potentiometer is implemented by a resistor array
composed of 127 resistive elements and a wiper switching
network. Between each element and at either end are tap
points accessible to the wiper terminal. The wiper of the
potentiometer has an associated volatile Wiper Counter
Register (WR) and a non-volatile Initial Value Register (IVR)
that can be directly written to and read by the user. The
contents of the WR controls the position of the wiper on the
resistor array through the switches. At power-up, the device
recalls the contents of the IVR to the corresponding WR.
The device can be used as a three-terminal potentiometer or
as a two-terminal variable resistor in a wide variety of
applications, including:
鈥?LCD contrast control
鈥?Parameter and bias adjustments
鈥?Industrial and automotive control
鈥?Mechanical pot replacement
Features
鈥?Non-volatile solid-state potentiometer
鈥?I
2
C serial interface
鈥?DCP terminal voltage, 0V to +13.2V
鈥?128 wiper tap points - 0.8% resolution
- Wiper position stored in nonvolatile memory and
recalled on power-up
鈥?127 resistive elements
- Temperature compensated
- Low wiper resistance 70惟 typical @ 3.3V
鈥?Low power CMOS
- Standby current, 2碌A(chǔ) @ V
CC
= +3.6V
鈥?High reliability
- Endurance, 200,000 data changes per bit
- Register data retention 50 years @ T
鈮?/div>
75擄C
鈥?R
TOTAL
values = 10k惟, 50k惟
鈥?10-lead MSOP package
- Pb-free plus anneal available (RoHS compliant)
Pinout
ISL95311
(10-LD MSOP)
TOP VIEW
Ordering Information
PART NUMBER
ISL95311WIU10Z
(See Note)
ISL95311UIU10Z
(See Note)
RESISTANCE
OPTION
(惟)
10K
50K
TEMP
RANGE
(擄C)
-40 to +85
-40 to +85
SDA
GND
1
2
3
4
5
10
9
8
7
6
SCL
V+
R
L
R
W
R
H
PACKAGE
10-Ld MSOP
(Pb-Free)
10-Ld MSOP
(Pb-Free)
V
CC
A1
A0
Add 鈥?TK鈥?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.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
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Intersil (and design) is a registered trademark of Intersil Americas Inc.
XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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