DS1856B-M50/T&R

Digital Potentiometers Overview

The DS1856B-M50/T&R is a dual, temperature-controlled, nonvolatile variable resistor IC featuring three analog monitor inputs and a direct-to-digital temperature sensor. It contains two 256-position linear variable resistors with a nominal resistance of 50 kOhms. The device operates on a 3.3V or 5V supply (2.85V to 5.5V range) with a typical current consumption of 2 mA. It utilizes a 2-wire serial interface for configuration and includes a 13-bit ADC for monitoring VCC, MON1-3, and internal temperature.

Digital Potentiometers Feature Summary

• Dual 256-position linear nonvolatile variable resistors with 50 kOhm nominal value
• Integrated 13-bit ADC for monitoring VCC, MON1, MON2, MON3, and temperature
• Temperature-controlled operation with lookup tables for -40°C to +95°C range
• Three-level password protection for memory access security

Digital Potentiometers Applications

• Optical Transceivers
• Optical Transponders
• RF Power Amplifiers
• Instrumentation and Industrial Controls

Digital Potentiometers Procurement Notes

Verify the specific suffix T&R indicates tape-and-reel packaging when sourcing. Confirm RoHS compliance status through official manufacturer documentation. Ensure the A0h EEPROM address configuration matches system requirements, as this variant includes 256 bytes at A0h compared to earlier models.

Digital Potentiometers Selection Notes

Select this component for applications requiring precise, temperature-compensated bias control in optical networks. The 50 kOhm resistance value suits specific impedance matching needs. Verify that the CSBGA-16 package fits the PCB layout constraints. Ensure the design supports the 2-wire serial interface timing requirements.

Digital Potentiometers Part Context

This part belongs to the DS1856M family, which enhances previous DS1856B/E series devices. It serves as a drop-in replacement for the DS1856B-050+ while adding features like selectable MON2/MON3 references and increased EEPROM capacity. The M50 designation specifies the 50 kOhm resistor variant within the broader DS1856M product line.

Digital Potentiometers Replacement Considerations

The DS1856B-M50+ is explicitly documented as a drop-in replacement for the DS1856B-050+. When substituting, verify that the additional 256-byte EEPROM at address A0h does not conflict with existing firmware addressing schemes.