ISL22426 Datasheet, PDF (1/15 Pages) Intersil Corporation – Low Noise, Low Power, SPI Bus, 128 Taps

ISL22426
®
Dual Digitally Controlled Potentiometer (XDCP™)
Data Sheet
September 8, 2009
FN6180.2
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.
Pinouts
V_CC
SHDN
RH0
RL0
RW0
NC
SCK
ISL22426
(14 LD TSSOP)
TOP VIEW
1
14
2
13
3
12
4
11
5
10
6
9
7
8
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: 70Ω typical @ V_CC = 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
• 14 Ld TSSOP and 16 Ld QFN package
• Pb-free (RoHS compliant)
ISL22426
(16 LD QFN)
TOP VIEW
16 15 14 13
RH0 1
RL0 2
RW0 ³
NC ⁴
12 RH1
11 RL1
10 RW1
9 NC
5678
Ordering Information
PART NUMBER
(Note)
PART
MARKING
RESISTANCE OPTION
(kΩ)
TEMP. RANGE
(°C)
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL22426UFV14Z*
22426 UFVZ
50
-40 to +125
14 Ld TSSOP
M14.173
ISL22426UFR16Z*
224 26UFZ
50
-40 to +125
16 Ld 4x4 QFN
L16.4x4A
ISL22426WFV14Z*
22426 WFVZ
10
-40 to +125
14 Ld TSSOP
M14.173
ISL22426WFR16Z*
224 26WFZ
10
-40 to +125
16 Ld 4x4 QFN
L16.4x4A
*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.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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