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ISL90842 Datasheet PDF : 10 Pages
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Data Sheet
ISL90842
Quad Digitally Controlled Variable Resistors
January 16, 2006
FN8096.1
Low Noise, Low Power I2C® Bus, 256 Taps
The ISL90842 integrates four digitally controlled
potentiometers (DCP) configured as variable resistors 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
I2C bus interface. Each potentiometer has an associated
Wiper Register (WR) that can be directly written to and read
by the user. The contents of the WR controls the position of
the wiper.
The DCPs can be used as two-terminal variable resistors in
a wide variety of applications including control, parameter
adjustments, and signal processing.
Features
• Four variable resistors in one package
• 256 resistor taps - 0.4% resolution
• I2C serial interface
• Wiper resistance: 70Ω typical @ 3.3V
• Standby current <5µA max
• Power supply: 2.7V to 5.5V
• 50kΩ, 10kΩ total resistance
• 14 Lead TSSOP
• Pb-free plus anneal available (RoHS compliant)
Pinout
ISL90842
(14 LEAD TSSOP)
TOP VIEW
RH3 1
RW3 2
SCL 3
SDA 4
GND 5
RW2 6
RH2 7
14 RW0
13 RH0
12 VCC
11 A1
10 A0
9 RH1
8 RW1
Ordering Information
PART NUMBER
PART MARKING
RESISTANCE OPTION
(Ω)
TEMP RANGE
(°C)
PACKAGE
ISL90842UIV1427Z (Notes 1 & 2) 90842UI27Z
50K
-40 to +85
14 Ld TSSOP (Pb-Free)
ISL90842WIV1427Z (Notes 1 & 2) 90842WI27Z
10K
-40 to +85
14 Ld TSSOP (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 Tape and Reel.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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