64 point, 2-wire serial bus dual digital control potentiometer | Heisener Electronics
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64 point, 2-wire serial bus dual digital control potentiometer

Technology Cover
Data di Pubblicazione: 2023-03-30, Intersil

The X9221A integrates two digitally controlled potentiometers (XDCPS) on a single chip CMOS integrated microcircuit. The digital control potentiometer is realized by a series array of 63 resistance elements. Between each element are contacts connected to the wiper terminal by a switch.


Pin arrangement

                                        

The position of the wiper on the array is controlled by the user through a 2-wire bus interface. Each potentiometer is associated with a volatile wiper counter register (WCR) and two non-volatile data registers (DR0:DR1) that can be written and read directly by the user.


Block diagram

                          

The contents of the WCR control the wiper position on the resistance array via a switch. Power up recalls the contents of DR0 to WCR. XDCP can be used as a three-terminal potentiometer or a two-end variable resistor for a variety of applications including control, parameter adjustment, and signal processing.


Detailed potentiometer block diagram

                         

Features

● Two XDCPs in one package

● 2-wire serial interface

● Register oriented format, 8 registers total

   - Directly write wiper position

   - Read the wiper position

   - Store as many as four positions per pot

● Instruction format

   - Quick transfer of register contents to resistor array

● Direct write cell

   - Endurance - 100,000 writes per bit per register

● Resistor array values

   - 2kΩ,10kΩ, 50 kΩ

● Resolution: 64 taps each pot

● 20 Ld plastic DIP and 20 Ld SOIC packages

● Pb-free plus anneal available (RoHS compliant)

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