ISL22446 Datasheet, PDF (1/15 Pages) Intersil Corporation – Quad Digitally Controlled Potentiometer XDCP

ISL22446
®
Quad Digitally Controlled Potentiometer (XDCP™)
Data Sheet
September 9, 2009
FN6181.2
Low Noise, Low Power, SPI^™ Bus, 128 Taps
The ISL22446 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 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
ISL22446
(20 LD TSSOP)
TOP VIEW
RH3 1
RL3 2
RW3 3
NC 4
SCK 5
SDO 6
GND 7
RW2 8
RL2 9
RH2 10
20 RW0
19 RL0
18 RH0
17 SHDN
16 VCC
15 SDI
14 CS
13 RH1
12 RL1
11 RW1
Features
• Four 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
• 20 Ld TSSOP and 20 Ld TQFN package
• Pb-free (RoHS compliant)
ISL22446
(20 LD TQFN)
TOP VIEW
O _{20 19 18 17 16}
RL0 1
RW0 2
RH3 3
RL3 4
RW3 5
15 RH1
14 RL1
13 _RW1
12 _RH2
11 RL2
6 7 8 9 10
Ordering Information
PART NUMBER
(Note)
PART
MARKING
RESISTANCE OPTION
(kΩ)
TEMP. RANGE
(°C)
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL22446UFV20Z*
22446 UFVZ
50
-40 to +125 20 Ld TSSOP
M20.173
ISL22446UFRT20Z*
224 46UFZ
50
-40 to +125 20 Ld 4x4 TQFN
L20.4x4A
ISL22446WFV20Z*
22446 WFVZ
10
-40 to +125 20 Ld TSSOP
M20.173
ISL22446WFRT20Z*
224 46WFZ
10
-40 to +125 20 Ld 4x4 TQFN
L20.4x4A
*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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