ISL22426
®
Dual Digitally Controlled Potentiometer (XDCP™)
Data Sheet
®
July 17, 2006
FN6180.0
Low Noise, Low Power, SPI Bus, 128 Taps
Features
The ISL22426 integrates two digitally controlled
potentiometers (DCP) and non-volatile memory on a
monolithic CMOS integrated circuit.
• Two potentiometers in one package
• 128 resistor taps
• SPI serial interface
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
SPI serial 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
DCP’s IVR to the corresponding WR.
• 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
The DCPs can be used as three-terminal potentiometers or
as two-terminal variable resistors in a wide variety of
applications including control, parameter adjustments, and
signal processing.
- Endurance: 1,000,000 data changes per bit per register
- Register data retention: 50 years @ T <55°C
• 14 Lead TSSOP
Pinout
• Pb-free plus anneal product (RoHS compliant)
ISL22426
(14 LEAD TSSOP)
TOP VIEW
14
13
V
SDI
1
2
3
4
5
6
7
CC
SHDN
RH0
CS
RH1
12
11
RL0
RL1
RW0
NC
RW1
10
9
GND
SDO
SCK
8
Ordering Information
RESISTANCE OPTION
TEMP. RANGE
PART NUMBER
PART MARKING
(kΩ)
(°C)
PACKAGE
14 Ld TSSOP
PKG. DWG. #
ISL22426UFV14Z
(Notes 1, 2)
22426 UFVZ
50
-40 to +125
M14.173
(Pb-free)
ISL22426WFV14Z
(Notes 1, 2)
22426 WFVZ
10
-40 to +125
14 Ld TSSOP
(Pb-free)
M14.173
NOTES:
1. 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.
2. Add “-TK” suffix for 1,000 Tape and Reel option
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1
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