Intersil Digitally Controlled Potentiometer (XDCP) – ISL22319/ISL22316

Category: Converters, Electronics, Intersil Corporation

Overview

The ISL22319 and ISL22316, highlighted in this datasheet from Intersil, are digitally controlled potentiometers (XDCP) designed to provide solid-state reliability and versatility for various electronic applications. With a focus on low power consumption and high stability, these devices are ideal for battery-operated devices and settings that necessitate precise control and adjustment.

Key Features

The datasheet details several significant features:

Solid-state potentiometer technology: Ensures robustness and longer lifespan compared to mechanical potentiometers.
2-wire serial interface: Simplifies communication with a microcontroller or other control logic with a minimal pin count.
Register oriented format: Permits direct read, write, and transfer of the wiper position within the system.
Memory capabilities: Each potentiometer can store up to four positions in nonvolatile memory, retaining data for up to 100 years and enduring 100,000 data changes per bit.
Adjustable resolution: A 10kΩ resistor array with 64 distinct taps allows fine-grained control over output.
Flexible power supply options: Operable at power supply levels ranging from 2.7V to 5.5V for Vcc and V+, and -7V to -5.5V for V-.
Low power CMOS: The use of CMOS technology ensures low standby current, under 1pA, enhancing the potentiometer’s potency in power-sensitive applications.
Package options: Available in 16 Ld SOIC and 14 Ld TSSOP packages, with Pb-free plus anneal options for RoHS compliance.

Description

The ISL22319 and ISL22316 XDCP integrate digitally controlled potentiometers on a monolithic CMOS microcircuit. This integration enables the potentiometers to act as either three-terminal devices or two-terminal variable resistors. Key to their function is an array of 63 resistive elements with switches connecting tap points to the wiper terminal. User control is facilitated by a 2-wire bus interface, which interacts with both volatile Wiper Counter Registers (WCR) and nonvolatile Data Registers (DR0 to DR3) to set and recall the wiper’s position.

Power-Up Recall and Application Use

On power-up, the device recalls the last saved wiper position from the nonvolatile Data Register DR0 to the WCR, making the devices ready-to-use without the need for reconfiguration after each power cycle. This feature aids in simplifying the usage of the potentiometer in a wide range of applications including controls, parameter adjustments, and signal processing.

Cautions and Trademarks

The final section of the analyzed content notes that the ISL22319 and ISL22316 are sensitive to electrostatic discharge and require proper Integrated Circuit (IC) handling procedures. It also mentions trademarks, copyrights, and the ownership of the XDCP trademark by Intersil Americas Inc.