DS1878T+

Sensor And Detector Interfaces Overview

The DS1878T+ is an SFP+ controller with a digital laser driver interface designed for SFF, SFP, and SFP+ modules. It operates within a voltage range of +2.85V to +5.5V and supports temperatures from -40°C to +95°C. The device features six ADC channels for monitoring VCC, temperature, and four external inputs (MON1–MON4), including differential support on MON3. Two 9-bit Delta-Sigma DAC outputs utilize 36-entry temperature-indexed lookup tables. It includes five quick-trip monitors, alarm flags, and a comprehensive fault-measurement system with maskable laser shutdown. Communication is handled via an I2C-compatible interface and a 3-wire master protocol for laser drivers.

Sensor And Detector Interfaces Feature Summary

• Meets all SFF-8472 control and monitoring requirements
• Laser bias controlled by APC loop and temperature LUT to compensate for tracking error
• Six analog monitor channels with scalable dynamic range and internal direct-to-digital temperature sensor
• Comprehensive fault-measurement system with maskable laser shutdown capability

Sensor And Detector Interfaces Applications

• SFF Transceiver Modules
• SFP Transceiver Modules
• SFP+ Transceiver Modules

Sensor And Detector Interfaces Procurement Notes

Verify the component against official Analog Devices documentation to confirm lead-free status and RoHS compliance. Ensure the package matches the specified 28-pin TQFN with exposed pad dimensions. Cross-reference the ordering suffix 'T+' with manufacturer records to validate the specific tape-and-reel or tube packaging configuration intended for your assembly process.

Sensor And Detector Interfaces Selection Notes

Select this controller when designing optical transceivers requiring integrated SFF-8472 compliance and digital laser driver interfacing. Verify that the operating voltage range aligns with your system power supply. Confirm compatibility with your chosen VCSEL, DFB, or EML laser solutions through the 3-wire master interface specifications.

Sensor And Detector Interfaces Part Context

The DS1878 series serves as a specialized power management and control IC within the Maxim Integrated portfolio, now part of Analog Devices. It addresses the specific needs of high-speed optical networking hardware by combining precise analog monitoring with robust digital control logic in a compact surface-mount package.

Sensor And Detector Interfaces Replacement Considerations

Consult the official datasheet revision history and cross-reference section for confirmed substitute part numbers. Verify pinout compatibility and electrical characteristics before integrating any alternative components into existing designs.