ISL90840 Datasheet, PDF (1/12 Pages) Intersil Corporation – Low Noise, Low Power I2C Bus, 256 Taps

ISL90840
®
Quad Digitally Controlled Potentiometers (XDCP™)
Data Sheet
July 27, 2005
FN8086.0
Low Noise, Low Power I²C^® Bus, 256 Taps
The ISL90840 integrates four digitally controlled
potentiometers (XDCP) 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 three-terminal potentiometers or
as two-terminal variable resistors in a wide variety of
applications including control, parameter adjustments, and
signal processing.
Ordering Information
PART NUMBER
PACKAGE
TEMP
RANGE
(°C)
RESISTANCE
OPTION
(Ω)
ISL90840UIV2027 20 Ld TSSOP -40 to +85
50K
ISL90840UIV2027Z 20 Ld TSSOP -40 to +85
50K
(Notes 1 & 2)
(Pb-Free)
ISL90840WIV2027 20 Ld TSSOP -40 to +85
10K
ISL90840WIV2027Z 20 Ld TSSOP -40 to +85
10K
(Notes 1 & 2)
(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. Contact factory for availability.
Features
• Four potentiometers in one package
• 256 resistor taps - 0.4% resolution
• I²C serial interface
- Three address pins, up to eight devices/bus
• Wiper resistance: 70Ω typical @ 3.3V
• Standby current <5µA max
• Power supply: 2.7V to 5.5V
• 50kΩ, 10kΩ total resistance
• 20 Lead TSSOP
• Pb-free plus anneal available (RoHS compliant)
Pinout
ISL90840
(20 LEAD TSSOP)
TOP VIEW
RH3 1
RL3 2
RW3 3
A2 4
SCL 5
SDA 6
GND 7
RW2 8
RL2 9
RH2 10
20 RW0
19 RL0
18 RH0
17 D.N.C.
16 VCC
15 A1
14 A0
13 RH1
12 RL1
11 RW1
Functional Diagram
V_CC
R_H0
R_H1
R_H2
R_H3
SCL
SDA
A0
A1
A2
I²C
INTERFACE
GND
R_L0 R_W0 R_L1 R_W1 R_L2 R_W2 R_L3 R_W3
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) and XDCP are registered trademarks of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.