MAX14987EXP+CKR

Overview

The MAX14987EXP+CKR is an octal, five-level high-voltage digital potentiometer manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates within a supply voltage range of 2.7V to 5.5V and features an SPI-compatible serial interface for data communication. The device utilizes a nonvolatile memory architecture to retain wiper positions during power-down conditions, ensuring data integrity without external backup. Packaged in a 28-pin TSSOP form factor, it supports industrial temperature ranges suitable for embedded control applications requiring precise resistance adjustment.

Feature Summary

• Octal configuration providing eight independent digital potentiometer channels
• Nonvolatile memory storage maintains wiper settings across power cycles
• SPI-compatible serial interface enables efficient digital control
• Five-level resolution allows for coarse-to-fine resistance tuning

Applications

• Industrial process control systems requiring multi-channel calibration
• Audio equipment volume and tone management circuits
• Instrumentation amplifier gain setting networks
• Programmable filter frequency adjustment modules

Procurement Notes

Verify component authenticity through authorized distributors due to obsolete status. Confirm package marking codes match the 28TSSOP specification. Check for lead-free compliance documentation as per RoHS standards. Ensure storage conditions prevent moisture sensitivity damage prior to reflow soldering. Validate pinout compatibility with existing PCB footprints before integration.

Selection Notes

Select this component when multiple independent variable resistors are needed in a single package. Consider the five-level resolution limits for applications requiring finer granularity. Evaluate the SPI interface speed requirements against system timing constraints. Assess the operating voltage range compatibility with the host microcontroller logic levels. Verify thermal dissipation capabilities within the enclosed TSSOP package.

Part Context

This part belongs to the MAX149xx series of digital potentiometers designed for precision analog signal conditioning. It complements other Maxim integrated solutions for sensor interfacing and actuator control. The device fills the niche for compact, digitally adjustable resistance networks in space-constrained designs. It represents the transition from mechanical potentiometers to solid-state programmable alternatives in legacy systems.

Replacement Considerations

• MAX14987EUI+T
• MAX14987ETI+

FAQ

What is the resolution of each potentiometer channel?

Each channel offers five discrete resistance levels, allowing for coarse adjustment rather than continuous analog variation.

How is data retained when power is removed?

The device incorporates nonvolatile memory that automatically stores the current wiper position upon power loss or command execution.