Overview

The X9401 integrates 4 digitally controlled potentiometers (XDCP) on a monolithic CMOS integrated microcircuit. The digitally controlled potentiometer is implemented using 64 resistive elements in a series array. Between each element are tap points connected to the wiper terminal through switches. The position of the wiper on the array is controlled by the user through the SPI bus interface. Each potentiometer has associated with it a volatile Wiper Counter Register (WCR) and 4 nonvolatile Data Registers (DR0:DR3) that can be directly written to and read by the user. The contents of the WCR controls the position of the wiper on the resistor array through the switches. Power-up recalls the contents of DR0 to the WCR. The XDCP can be used as a three-terminal potentiometer or as a two-terminal variable resistor in a wide variety of applications including control, parameter adjustments, and signal processing.

X9401 Functional Diagram
X9401 Functional Diagram
  • Quad - 4 Separate Pots, 64 Taps/Pot
  • Nonvolatile Storage of Wiper Position
  • Four Nonvolatile Data Registers for Each Pot
  • 16-bytes of EEPROM Memory
  • SPI Serial Interface
  • RTOTAL = 10kΩ
  • Wiper Resistance = 150Ω Typical
  • Standby Current < 3µA (Total Package)
  • Operating Current < 700µA max.
  • VCC = 2.7V to 5V
  • 24 Ld SOIC and 24 Ld TSSOP Package
  • 100 year Data Retention
  • Pb-Free Available (RoHS Compliant)

Documentation

Design & Development

Software Downloads
Type Title Date
Library
DCP Evaluation Board Software v6.03
EXE 2.56 MB
1 item

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

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Product Options

    Processing table
    Pkg. Type
    Carrier Type
    Moisture Sensitivity Level (MSL)
    Price (USD) | 1ku
    Buy / Sample
    Part Number
    X9401WS24IZ-2.7
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    Samples Available
    		 SOICW Tube 3 10.67 Get Samples,
    X9401WS24IZ-2.7T1
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    		SOICW Reel 3 11.47
    X9401WV24IZ-2.7
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    Samples Available
    		 TSSOP Tube 3 16.3 Get Samples,
    X9401WV24IZ-2.7T1
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    		TSSOP Reel 3
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