X9312
Digitally Controlled Potentiometer (XDCP™)

Key Features

• Solid-state potentiometer
• 3-wire serial interface
• Terminal voltage, 0 to +15V
• 100 wiper tap points
• Wiper position stored in nonvolatile memory and recalled on power-up
• 99 resistive elements
• Temperature compensated
• End to end resistance range ± 20%
• Low power CMOS
• V_CC = 5V
• Active current, 3mA max.
• Standby current, 1mA max.
• High reliability
• Endurance, 100,000 data changes per bit
• Register data retention, 100 years
• RTOTAL values = 10kΩ, 50kΩ, and 100kΩ
• Packages
• 8-lead SOIC and DIP

Description

The Intersil X9312 is a digitally controlled potentiometer (XDCP). The device consists of a resistor array, wiper switches, a control section, and nonvolatile memory. The wiper position is controlled by a 3-wire interface.

The potentiometer is implemented by a resistor array composed of 99 resistive elements and a wiper switching network. Between each element and at either end are tap points accessible to the wiper terminal. The position of the wiper element is controlled by the CS, U/D, and INC inputs. The position of the wiper can be stored in nonvolatile memory and then be recalled upon a subsequent power-up operation.

The device 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 $$ signal processing