CAT5138: Digital Potentiometer (POT), 128-Taps, I2C Interface

Description: CAT5136, CAT5137, and CAT5138 are a family of digi...
  • CAT5136, CAT5137, and CAT5138 are a family of digital POTs operating like mechanical potentiometers in various configurations. The tap points between the 127 equal resistive elements are connected to the wiper output via CMOS switches. The switches are controlled by a 7-bit Wiper Control Register (WCR) via the I2C serial bus. CAT5136 is configured as a variable resistor. CAT5137 and CAT5138 are resistive voltage dividers, with one terminal of the potentiometer connected to GND. CAT5137 and CAT5138 have different device IDs, which makes it possible to use both on the same I2C bus. Upon power-up, the WCR is set to mid-scale (1000000).
  • Features
  • Single Linear digital POT with 128 Taps - High Resolution
  • I2C Interface - Easy to Integrate in Application
  • Low Standby Current - Low Power Loss
  • End-to-End Resistance of 10 kΩ, 50 kΩ and 100 kΩ
  • Wiper goes to Midscale at Power-up
  • Digital Supply Range (VDD): 2.7 V to 5.5 V
  • Industrial Temperature Range: -40°C to +85°C
  • Applications
  • LCD Screen Adjustment
  • Volume Control
  • Mechanical Potentiometer Replacement
  • Gain Adjustment
  • Line Impedance Matching
  • VCOM Setting Adjustments
  • End Products
  • Industrial Equipment
  • Technical Documentation & Design Resources
    Availability and Samples
    CAT5138SDI-10GT3
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: Digital Potentiometer (POT), 128-Taps, I2C Interface
  • Package Type: SC-88-6 / SC-70-6 / SOT-363-6
  • Package Case Outline: 419AD
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 3000
  • Inventory

  • Market Leadtime (weeks):2 to 4
  • Arrow:0
  • Digikey:>1K
  • Newark:>1K
  • ON Semiconductor:15,000
  • Specifications
  • # of Pots:
  • # of Taps: 128 
  • Type: Potentiometer 
  • Control Interface: I2C 
  • Resistance Typ (kΩ): 10 
  • VH Max (V): VCC 
  • Wiper Position Memory: No 
  • VDD Max (V): 5.5 
  • Package Type: SC-88-6 / SC-70-6 / SOT-363-6 
  • ON Semiconductor Full Web Site