intersil ISL90726 DATA SHEET
®
www.BDTIC.com/Intersil
ISL90726
Single Volatile 128-Tap XDCP
Data Sheet December 22, 2005
Digitally Controlled Potentiometer
(XDCP™)
The Intersil ISL90726 is a digitally controlled potentiometer
(XDCP). The device consists of a resistor array, wiper
switches, and a control section. 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 position of the
wiper element is controlled by the SDA and SCL inputs.
The device can be used in a wide variety of applications
including:
• Mechanical potentiometer replacement
• Transducer adjustment of pressure, temperature, position,
chemical, and optical sensors
• Laser diode and LED biasing
• LCD brightness and contrast adjustment
• Gain control and offset adjustment
Pinout
ISL90726
(6 LD SC-70)
TOP VIEW
FN8244.3
Features
• Volatile Solid-State Potentiometer
2
•I
C Serial Bus Interface
• DCP Terminal Voltage, 2.7V to 5.5V
•Low Tempco
- Rheostat - 45 ppm/
- Divider - 15 ppm/°C typical
• 128 Wiper Tap Points
- Wiper resistance 70Ω typ at V
• Low Power CMOS
- Active current, 200µA max
- Standby current, 500nA max
• Available R
TOTAL
• Power on Preset to Midscale
• Direct replacement for AD5246
• Packaging
- 6 Ld SC-70
• Pb-free plus anneal available (RoHS compliant)
°C typical
= 3.3V
CC
Values = 50kΩ, 10kΩ
VDD
GND
SCL
1
2
3
6
RL
5
RW
SDA
4
Ordering Information
PAR T N UMBER
(See Note) PART MARKING R
ISL90726WIE627Z-TK ANF 10K -40 to +85 6 Ld SC-70 P6.049
ISL90726UIE627Z-TK ANG 50K -40 to +85 6 Ld SC-70 P6.049
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.
TOTAL
(Ω)
TEMP RANGE
(°C)
PACKAGE
(Pb-free) PKG. DWG. #
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
All other trademarks mentioned are the property of their respective owners.
ISL90726
www.BDTIC.com/Intersil
Pin Descriptions
PIN NUMBER SYMBOL DESCRIPTION
1 VDD Supply Voltage
2 GND Ground
3 SCL Open drain Serial Clock input
4 SDA Open drain Serial Data I/O
5 RW Potentiometer Wiper Terminal
6 RL Potentiometer End Terminal
Block Diagram
VDD
SCL
SDA
I2C
INTERFACE
RH
RW
WIPER
REGISTER
GND
RL
2
FN8244.3
December 22, 2005
ISL90726
www.BDTIC.com/Intersil
Absolute Maximum Ratings Thermal Information
Storage temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Voltage at any digital interface pin
with respect to V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +7V
V
CC
Voltage at any DCP pin with
respect to V
Lead temperature (soldering, 10s). . . . . . . . . . . . . . . . . . . . . . 300°C
I
(10s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±6mA
W
Latchup . . . . . . . . . . . . . . . . . . . . . . . . . . . Class II, Level B at 85°C
ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >2kV Human Body Model
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
1. θ
JA
Analog Specifications Over recommended operating conditions unless otherwise stated.
SYMBOL PARAMETER TEST CONDITIONS MIN
R
TOTAL
R
W
C
H/CL/CW
I
LkgDCP
RESISTOR MODE
RINL
(Note 8)
(Note 7) Differential non-linearity DCP register set between 20 hex
RDNL
Roffset
(Note 6)
TC
R
(Notes 9, 10)
. . . . . . . . . . . . . . . . . . . . . . -0.3V to VCC+0.3
SS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to V
SS
RH to RL resistance W, U versions respectively 10, 50 kΩ
to RL resistance tolerance -20 +20 %
R
H
Wiper resistance VCC = 3.3V @25°C 85 Ω
Potentiometer Capacitance 10/10/
Leakage on DCP pins Voltage at pin from GND to V
Integral non-linearity DCP register set between 20 hex and 7F hex.
Offset W option 0 1 3 MI
Resistance Temperature Coefficient DCP register set between 20 hex and 7F hex ±45 ppm/°C
CC
Monotonic over all tap positions
and 7F hex. Monotonic over all tap
positions
U option 0 0.5 2 MI
Thermal Resistance (Typical, Note 1) θ
6 Lead SC-70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 590
Recommended Operating Conditions
Industrial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V
CC
Power rating of each DCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mW
TYP
(Note 1) MAX UNIT
25
CC
-2 ±0.25 2 MI
W option -1 ±0.1 1 MI
U option -1 ±0.1 1 MI
0.1 1 µA
(°C/W)
JA
pF
(Note 5)
(Note 5)
(Note 5)
(Note 5)
(Note 5)
Operating Specifications
SYMBOL PARAMETER TEST CONDITIONS MIN
I
CC1
I
SB
I
ComLkg
(Note 10) DCP wiper response time SCL falling edge of last bit of DCP Data Byte to
t
DCP
V
Ramp VCC ramp rate 0.2 V/ms
CC
VCC supply current
(Volatile write/read)
VCC current (standby) V
Common-Mode Leakage Voltage at SDA pin at GND or V
f
= 400kHz; SDA = Open; (for I2C, Active,
SCL
Read and Volatile Write States only)
= +5.5V, I2C Interface in Standby State 500 nA
CC
CC
wiper change
3
TYP
(Note 1) MAX UNIT
200 µA
3µA
500 ns
FN8244.3
December 22, 2005
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