DATASHEET
NOT RECOMMENDED FOR NEW DESIGNS
RECOMMENDED REPLACEMENT PART
ISL22424
ISL22426
FN6180
Rev 2.00
September 8, 2009
Dual Digitally Controlled Potentiometer (XDCP™) Low Noise, Low Power, SPI™
Bus, 128 Taps
Features
The ISL22426 integrates two digitally controlled
• Two potentiometers in one package
potentiometers (DCP) and non-volatile memory on a
monolithic CMOS integrated circuit.
• 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: 70 typical @ V
• Shutdown mode
= 3.3V
CC
• Shutdown current 5µA max
• Power supply: 2.7V to 5.5V
• 50kor 10k 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 Ld TSSOP and 16 Ld QFN package
• Pb-free (RoHS compliant)
Pinouts
ISL22426
(14 LD TSSOP)
TOP VIEW
ISL22426
(16 LD QFN)
TOP VIEW
14
13
12
11
10
9
V
1
2
3
4
5
6
7
SDI
CC
SHDN
RH0
RL0
CS
16 15 14 13
RH1
RL1
RW1
GND
SDO
1
2
3
4
12
11
10
9
RH0
RL0
RW0
NC
RH1
RL1
RW1
RW0
NC
SCK
8
NC
5
6
7
8
Ordering Information
PART NUMBER
PART
RESISTANCE OPTION
TEMP. RANGE
(°C)
PACKAGE
(Pb-free)
PKG.
DWG. #
(Note)
MARKING
22426 UFVZ
224 26UFZ
(k)
ISL22426UFV14Z*
ISL22426UFR16Z*
ISL22426WFV14Z*
ISL22426WFR16Z*
50
-40 to +125
-40 to +125
-40 to +125
-40 to +125
14 Ld TSSOP
16 Ld 4x4 QFN
14 Ld TSSOP
16 Ld 4x4 QFN
M14.173
50
L16.4x4A
M14.173
L16.4x4A
22426 WFVZ
224 26WFZ
10
10
*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.
FN6180 Rev 2.00
September 8, 2009
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