CAT5171 Datasheet, PDF (1/12 Pages) ON Semiconductor – 256-Position I2C Compatible Digital Potentiometer

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 mA. 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 kW, 100 kW
• 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, I_DD 2 mA 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
SOT23−8
TP, TB SUFFIX
CASE 527AK
MARKING DIAGRAM
AFYM
AGYM
1
1
AF = 50 kW
AG = 100 kW
Y = Production Year
Y = (Last Digit)
M = Production Month
M = (1 − 9, A, B, C)
PIN CONNECTIONS
W
V_DD
GND
SCL
1
(Top View)
A
B
AD0
SDA
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
© Semiconductor Components Industries, LLC, 2009
1
August, 2009 − Rev. 1
Publication Order Number:
CAT5171/D