DESCRIPTION

The Intersil X9318 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 for voltage control or as a two-terminal variable resistor for current control in a wide variety of applications.

FEATURES

? Solid-state potentiometer

? 3-wire serial interface

? Terminal voltage, 0 to +8V

? 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

—VCC = 5V

—Active current, 3mA max.

—Standby current, 1mA max.

? High reliability

—Endurance, 100,000 data changes per bit

—Register data retention, 100 years

? RTOTAL value = 10k?

? Packages

—8 Ld SOIC and DIP

? Pb-free plus anneal available (RoHS compliant)

APPLICATIONS

? LCD bias control

? DC bias adjustment

? Gain and offset trim

? Laser diode bias control

? Voltage regulator output control