ISL95311 Datasheet, PDF (1/11 Pages) Intersil Corporation – Terminal Voltage 0V to 13.2V, 128 Taps I2C Interface

®
Data Sheet
ISL95311
Digitally Controlled Potentiometer (XDCP™)
February 6, 2008
FN8084.1
Terminal Voltage 0V to 13.2V, 128 Taps I²C
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 I²C 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:
• LCD contrast control
• Parameter and bias adjustments
• Industrial and automotive control
• Mechanical pot replacement
Features
• Non-volatile solid-state potentiometer
• I²C serial interface
• DCP terminal voltage, 0V to +13.2V
• 128 wiper tap points - 0.8% resolution
- Wiper position stored in nonvolatile memory and
recalled on power-up
• 127 resistive elements
- Temperature compensated
- Low wiper resistance 70Ω typical @ 3.3V
• Low power CMOS
- Standby current, 2µA @ V_CC = +3.6V
• High reliability
- Endurance, 200,000 data changes per bit
- Register data retention 50 years @ T ≤ +75°C
• R_TOTAL values = 10kΩ, 50kΩ
• 10 Ld MSOP package
• Pb-free (RoHS compliant)
Pinout
ISL95311
(10-LD MSOP)
TOP VIEW
SDA 1
GND 2
V_CC
3
A1 4
A0 5
10
SCL
9
V+
8
R_L
7
R_W
6
R_H
Ordering Information
PART NUMBER
(Note)
RESISTANCE OPTION
PART MARKING
(Ω)
TEMP RANGE
(°C)
PACKAGE
(Pb-Free)
PKG. DWG. #
ISL95311WIU10Z
AJE
10k
-40 to +85
10-Ld MSOP
M10.118
ISL95311UIU10Z
AJD
50k
-40 to +85
10-Ld MSOP
M10.118
Add “-TK” suffix for tape and reel. Please refer to TB347 for details on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and 100%
matte tin plate PLUS ANNEAL - e3 termination finish, which is 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 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, 2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.