1
®
FN6330.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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ISL22329
Dual Digitally Controlled Potentiometers (XDCP™)
Low Noise, Low Power, I
2
C™ Bus,
128 Taps, Wiper Only
The ISL22329 integrates two digitally controlled
potentiometers (DCP) and non-volatile memory on a
monolithic CMOS integrated circuit.
The digitally controlled potentiometers are implemented with
a combination of resistor elements and CMOS switches. The
position of the wipers are controlled by the user through the
I
2
C bus interface. Each potentiometer has an associated
volatile Wiper 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. At power-up the device recalls the contents of the two
DCP’s IVR to the corresponding WRs.
The DCPs can be used as a voltage divider in a wide variety
of applications including control, parameter adjustments, AC
measurement and signal processing.
Features
• Two potentiometers in one package
• 128 resistor taps
•I
2
C serial interface
- Three address pins, up to eight devices/bus
• Non-volatile storage of wiper position
• Wiper resistance: 70Ω typical @ 3.3V
• Shutdown mode
• Shutdown current 5µA max
• Power supply: 2.7V to 5.5V
•50kΩ or 10kΩ total resistance
• High reliability
- Endurance: 1,000,000 data changes per bit per register
- Register data retention: 50 years @ T <
+55°C
•10 Ld MSOP
• Pb-free (RoHS compliant)
Pinout
ISL22329
(10 LD MSOP)
TOP VIEW
1
2
3
4
56
10
9
8
7
SCL
RW1
GND
SDA
RW0A2
A0
A1
V
CC
SHDN
Ordering Information
PART NUMBER
(Note) PART MARKING
RESISTANCE OPTION
(kΩ)
TEMP. RANGE
(°C)
PACKAGE
(Pb-free) PKG. DWG. #
ISL22329UFU10Z* 329UZ 50 -40 to +125 10 Ld MSOP M10.118
ISL22329WFU10Z* 329WZ 10 -40 to +125 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.
Data Sheet September 4, 2009
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