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Intersil Electronic Components Datasheet

ISL22426 Datasheet

Dual Digitally Controlled Potentiometer

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ISL22426
® Dual Digitally Controlled Potentiometer (XDCP™)
Data Sheet
July 17, 2006
FN6180.0
Low Noise, Low Power, SPI® Bus, 128 Taps
The ISL22426 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
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.
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.
Pinout
www.DataSheet4U.com
VCC
SHDN
RH0
RL0
RW0
NC
SCK
ISL22426
(14 LEAD TSSOP)
TOP VIEW
1 14
2 13
3 12
4 11
5 10
69
78
SDI
CS
RH1
RL1
RW1
GND
SDO
Features
• Two potentiometers in one package
• 128 resistor taps
• SPI serial interface
• Non-volatile storage of wiper position
• Wiper resistance: 70typical @ 3.3V
• Shutdown mode
• Shutdown current 5µA max
• Power supply: 2.7V to 5.5V
• 50kor 10ktotal resistance
• High reliability
- Endurance: 1,000,000 data changes per bit per register
- Register data retention: 50 years @ T <55°C
• 14 Lead TSSOP
• Pb-free plus anneal product (RoHS compliant)
Ordering Information
PART NUMBER
PART MARKING
RESISTANCE OPTION
(k)
TEMP. RANGE
(°C)
PACKAGE
PKG. DWG. #
ISL22426UFV14Z
(Notes 1, 2)
22426 UFVZ
50
-40 to +125
14 Ld TSSOP
M14.173
(Pb-free)
ISL22426WFV14Z
(Notes 1, 2)
22426 WFVZ
10
-40 to +125
14 Ld TSSOP
M14.173
(Pb-free)
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
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) and XDCP are registered trademarks of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.


Intersil Electronic Components Datasheet

ISL22426 Datasheet

Dual Digitally Controlled Potentiometer

No Preview Available !

Block Diagram
SCK
SDI
SDO
CS
SPI
INTERFACE
SHDN
ISL22426
VCC
POWER UP
INTERFACE,
CONTROL
AND STATUS
LOGIC
NON-
VOLATILE
REGISTERS
WR1
WR0
RH1
RW1
RL1
RH0
RW0
RL0
Pin Descriptions
TSSOP PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SYMBOL
VCC
SHDN
RH0
RL0
RW0
NC
SCK
SDO
GND
RW1
RL1
RH1
CS
SDI
GND
Power supply pin
Shutdown active low input
“High” terminal of DCP0
“Low” terminal of DCP0
“Wiper” terminal of DCP0
DESCRIPTION
SPI interface clock input
Open drain SPI interface Data Output
Device ground pin
“Wiper” terminal of DCP1
“Low” terminal of DCP1
“High” terminal of DCP1
Chip Select active low input
SPI interface Data Input
2 FN6180.0
July 17, 2006


Part Number ISL22426
Description Dual Digitally Controlled Potentiometer
Maker Intersil Corporation
Total Page 13 Pages
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