ISL22429 Datasheet, PDF (1/13 Pages) Intersil Corporation – Low Noise, Low Power, SPI Bus, 128 Taps, Wiper Only

ISL22449
®
Quad Digitally Controlled Potentiometer (XDCP™)
Data Sheet
July 17, 2009
FN6333.3
Low Noise, Low Power, SPI^® Bus, 128 Taps,
Wiper Only
The ISL22449 integrates four 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 DCP can be used as a voltage divider in a wide variety
of applications including control, parameter adjustments, AC
measurement and signal processing.
Pinout
ISL22449
(14 LD TSSOP)
TOP VIEW
RW3 1
NC 2
SCK 3
SDO 4
GND 5
RW2 6
RW1 7
14 RW0
13 SHDN
12 V_CC
11 NC
10 SDI
9 CS
8 NC
Features
• Four potentiometers in one package
• 128 resistor taps
• SPI serial interface
• Non-volatile storage of wiper position
• Wiper resistance: 70Ω typical
• Shutdown mode
• Shutdown current 6.5µA 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 Lead TSSOP
• Pb-free (RoHS compliant)
Ordering Information
PART NUMBER
(Note)
PART
MARKING
RESISTANCE OPTION
(kΩ)
TEMP. RANGE
(°C)
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL22449UFV14Z*
22449 UFVZ
50
-40 to +125
14 Ld TSSOP
M14.173
ISL22449WFV14Z*
22449 WFVZ
10
-40 to +125
14 Ld TSSOP
M14.173
*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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