CAT5171: Digital Potentiometer (POT), 256-Tap, I2C Compatible

The CAT5171 is a 256-position linear taper digital POT 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 µA. This low operating current, combined with a small package footprint, makes the CAT5171 ideal for battery-powered portable applications.The CAT5171 is designed as a pin for pin replacement for the AD5245 and operates over the -40°C to +85°C industrial temperature range.

Features
  • 256-position
  • End-to-End Resistance: 50 kΩ, 100 kΩ
  • 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 µA max
  • Wide Operating Temperature -40°C to +85°C
Applications
  • Potentiometer Replacement
  • Transducer Adjustment of Pressure, Temperature, Position, Chemical, and Optical Sensors
  • RF Amplifier Biasing
  • Gain Control and Offset Adjustment
End Products
  • Industrial Equipment
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Digital Potentiometer (POT), 256-Tap, I2C CompatibleCAT5171/D (203.0kB)2
Package Drawings (1)
Document TitleDocument ID/SizeRevision
SOT-23, 8 Lead, 1.6x2.9527AK (57.6kB)A
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
CAT5171TBI-00GT3ActivePb-free Halide freeSOT-23-8527AK1Tape and Reel3000$0.5333
CAT5171TBI-50GT3ActivePb-free Halide freeSOT-23-8527AK1Tape and Reel3000$0.5333
Specifications
Product# of Pots# of TapsTypeControl InterfaceResistance Typ (kΩ)VH Max (V)Wiper Position MemoryVDD Max (V)
CAT5171TBI-00GT31256PotentiometerI2C100VCCNo5.5
CAT5171TBI-50GT31256PotentiometerI2C50VCCNo5.5
Digital Potentiometer (POT), 256-Tap, I2C Compatible (203.0kB) CAT5171
SOT-23, 8 Lead, 1.6x2.9 CAT5172