256-Position I2C Compatible Digital Potentiometer0 pages

© Semiconductor Components Industries, LLC, 2009
August, 2009 - Rev. 1
1 Publication Order Number:
CAT5171/D
CAT5171
256-Position I2C Compatible
Digital Potentiometer
The CAT5171 is a 256-position digitally programmable linear taper
potentiometer ideally suited for replacing mechanical potentiometers
and variable resistors.
The wiper settings are controlled through an I2C-compatible digital
interface. Upon power-up, the wiper assumes a midscale position and
may be repositioned anytime after the power is stable. The device can
be programmed to reset the wiper position to midscale or to go to a
shutdown state during operation. An address input pin, AD0, allows
the connection of two devices onto the same I2C bus.
The CAT5171 operates from 2.7 V to 5.5 V, while consuming less
than 2 A. This low operating current, combined with a small package
footprint, makes the CAT5171 ideal for battery-powered portable
applications.
The CAT5171, designed as a pin for pin replacement for the
AD5245, is offered in the 8-lead SOT23 package and operates over
the -40°C to +85°C industrial temperature range.
Features
• 256-position
• End-to-End Resistance: 50 k, 100 k
• I2C Compatible Interface
• Power-on Preset to Midscale
• Single Supply 2.7 V to 5.5 V
• Low Temperature Coefficient 100 ppm/°C
• Low Power, IDD 2 A max
• Wide Operating Temperature -40°C to +85°C
• RoHS-compliant SOT-23 8-Lead (2.9 mm x 3 mm) Package
Typical Applications
• Potentiometer Replacement
• Transducer Adjustment of Pressure, Temperature, Position,
Chemical, and Optical Sensors
• RF Amplifier Biasing
• Gain Control and Offset Adjustment
http://onsemi.com
PIN CONNECTIONS
SDA
AD0
B
A
SCL
GND
VDD
W 1
(Top View)
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
ORDERING INFORMATION
SOT23-8
TP, TB SUFFIX
CASE 527AK
AF = 50 k
AG = 100 k
Y = Production Year
Y = (Last Digit)
M = Production Month
M = (1 - 9, A, B, C)
AFYM
MARKING DIAGRAM
1
AGYM
1