DS1856E-030+T&R

Digital Potentiometers Overview

The DS1856E-030+T&R is a dual, temperature-controlled, nonvolatile variable resistor IC featuring three analog monitor inputs and an integrated direct-to-digital temperature sensor. It contains two 256-position linear variable resistors with a nominal resistance of 30kΩ each. The device operates on a 2-wire serial interface and supports supply voltages from 2.85V to 5.5V. It includes internally calibrated monitors for VCC, MON1, MON2, MON3, and temperature, providing alarm and warning flags. The component utilizes EEPROM memory for settings storage and offers password protection.

Digital Potentiometers Feature Summary

• Dual 256-position linear variable resistors (30kΩ) with nonvolatile storage
• Integrated direct-to-digital temperature sensor with ±3.0°C accuracy over -40°C to +95°C
• Three external analog monitor inputs (MON1, MON2, MON3) supporting internal calibration
• SFF-8472 compatible with configurable 2-wire serial addressing and three-level password protection

Digital Potentiometers Applications

• Optical Transceivers
• Optical Transponders
• Instrumentation and Industrial Controls
• RF Power Amplifiers
• Diagnostic Monitoring Systems

Digital Potentiometers Procurement Notes

Verify the specific suffix T&R indicates tape-and-reel packaging configuration. Confirm current availability status as distribution channels may list this item as obsolete or end-of-life. Ensure the 30kΩ resistance variant matches the design requirements, distinct from other available resistance values in the DS1856 family.

Digital Potentiometers Selection Notes

Select this model when dual independent temperature-compensated resistors are required alongside comprehensive system monitoring. The 30kΩ resistance value suits applications needing higher impedance biasing compared to lower resistance variants. Verify that the 2-wire serial bus voltage levels are compatible with the host controller logic for reliable communication.

Digital Potentiometers Part Context

This component belongs to the Maxim Integrated DS1856 family of digital potentiometers. It is functionally similar to the DS1859 but features a memory map compatible with the DS1852. The 'E' designation typically denotes the industrial temperature range and specific package type, while '+T&R' specifies lead-free construction and tape-and-reel delivery format.

Digital Potentiometers Replacement Considerations

The DS1856M series serves as a functional replacement within the same family. Specific cross-model compatibility exists with DS1856B-050+ and DS1856E-050+ regarding pinout and basic functionality, though resistance values differ. Verify memory map alignment if migrating between DS1856 and DS1852-based designs.