CAT5172 Datasheet, PDF (1/10 Pages) ON Semiconductor – 256-Position SPI Compatible Digital Potentiometer

CAT5172
256-Position SPI
Compatible Digital
Potentiometer
The CAT5172 is a 256−position digitally programmable linear taper
potentiometer ideally suited for replacing mechanical potentiometers
and variable resistors. Like mechanical potentiometers, the CAT5172
has a resistive element, which can span V_CC to Ground or float
anywhere between the power supply rails.
Wiper settings are controlled through an SPI−compatible digital
interface. Upon power−up, the wiper assumes a mid−span position and
may be repositioned anytime after the power is stable.
The CAT5172 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, make the CAT5172 ideal for battery−powered portable
appliance.
Features
• 256−position
• End−to−End Resistance: 50 kW, 100 kW
• SPI 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
• This is a Pb−Free Device
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
TB SUFFIX
CASE 527AK
MARKING DIAGRAM
ADYM
AEYM
1
1
AD = 50 kW
AE = 100 kW
Y = Production Year
Y = (Last Digit)
M = Production Month
M = (1 − 9, A, B, C)
PIN CONNECTIONS
W
1
A
V_DD
B
GND
CS
CLK
SDI
(Top View)
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
May, 2009 − Rev. 0
Publication Order Number:
CAT5172/D