CAT5172: Digital Potentiometer (POT), 256-Tap, SPI Compatible

The CAT5172 is a 256-position linear taper digital POT ideally suited for replacing mechanical potentiometers and variable resistors. Like mechanical potentiometers, the CAT5172 has a resistive element, which can span VCC 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 µA. This low operating current, combined with a small package footprint, makes the CAT5172 ideal for battery powered portable appliance.

Features
  • 256-position
  • End-to-End Resistance: 50 kΩ, 100 kΩ
  • 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, 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, SPI CompatibleCAT5172/D (216.0kB)1
Package Drawings (1)
Document TitleDocument ID/SizeRevision
SOT-23, 8 Lead, 1.6x2.9527AK (57.6kB)A
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
CAT5172TBI-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)
CAT5172TBI-50GT31256PotentiometerSPI50VCCNo5.5
Digital Potentiometer (POT), 256-Tap, SPI Compatible (216.0kB) CAT5172
SOT-23, 8 Lead, 1.6x2.9 CAT5172