ISL90840
®
Quad Digitally Controlled Potentiometers (XDCP™)
Data Sheet
November 14, 2006
FN8086.2
2
Low Noise, Low Power I C® Bus, 256 Taps
Features
The ISL90840 integrates four digitally controlled
potentiometers (XDCP) on a monolithic CMOS integrated
circuit.
• Four potentiometers in one package
• 256 resistor taps - 0.4% resolution
2
• I C serial interface
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
- Three address pins, up to eight devices/bus
- Write/Read capability
2
I C bus interface. Each potentiometer has an associated
• Power-on preset to mid-scale (128 tap position)
• Wiper resistance: 70Ω typical @ 3.3V
• Standby current <5µA max
volatile 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. When powered on the ISL90810’s
wiper will always commence at mid-scale (128 tap position).
• Power supply: 2.7V to 5.5V
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.
• 50kΩ, 10kΩ total resistance
• 20 Ld TSSOP package
• Pb-free plus anneal available (RoHS compliant)
Pinout
ISL90840
(20 LD TSSOP)
TOP VIEW
RH3
RL3
RW3
A2
1
20
19
18
17
16
15
14
13
12
11
RW0
RL0
RH0
D.N.C.
VCC
A1
2
3
4
SCL
SDA
GND
RW2
RL2
RH2
5
6
7
A0
8
RH1
RL1
RW1
9
10
Ordering Information
RESIST-ANCE
OPTION
(Ω)
TEMP
RANGE
(°C)
PART NUMBER
PART MARKING
PACKAGE
20 Ld TSSOP (Pb-free)
20 Ld TSSOP
PKG. DWG #
MDP0044
MDP0044
MDP0044
MDP0044
MDP0044
MDP0044
ISL90840UIV2027Z (Notes 1 and 2) ISL90840UI27Z
ISL90840UIV2027 ISL90840UI27
50k
50k
50k
10k
10k
10k
-40 to +85
-40 to +85
-40 to +105
-40 to +85
-40 to +85
-40 to +105
ISL90840UAV2027Z (Notes 1 and 2) ISL90840UA27Z
ISL90840WIV2027Z (Notes 1 and 2) ISL90840WI27Z
20 Ld TSSOP (Pb-free)
20 Ld TSSOP (Pb-free)
20 Ld TSSOP
ISL90840WIV2027
ISL90840WI27
ISL90840WAV2027Z (Notes 1 and 2) ISL90840WA27Z
NOTES:
20 Ld TSSOP (Pb-free)
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 “T2” suffix for tape and reel.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1
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