General Description

The DS1886 controls and monitors all functions for SFF, SFP, and SFP+ modules including all SFF-8472 functionality for GPON/EPON and 10G PON ONU applications. The combination of the DS1886 with the MAX3710 supports all transmitter and receiver functionality. The DS1886 includes modulation current control and APC setpoint control with tracking error adjustment. It continually monitors RSSI for LOS generation.

Features

◆ Meets All SFF-8472 Control and Monitoring Requirements

◆ Companion Controller for the MAX3710 Laser Driver/Limiting Amplifier and MAX3945 Limiting Amplifier

◆ MAX3710/DS1886 Combination Supports Broad Spectrum of Continuous Mode and PON Applications Up to 2.5GHz

◆ Temperature Lookup Table (LUT) to Compensate for APC Tracking Error and Dual Closed-Loop Variables

◆ Three Laser Control Modes

    ◇ Dual Closed Loop: Laser Bias and Laser Modulation Are Automatically Controlled with Multiple LUTs to Compensate Dual Closed-Loop Calibration Points

    ◇ APC Loop: Laser Bias Automatically Controlled, Laser Modulation Controlled by Temperature LUT

    ◇ Open Loop: Laser Bias and Laser Modulation Are Controlled by Temperature LUTs

◆ 13-Bit ADC

    ◇ Laser Bias, Laser Power, and Receive Power Support Internal and External Calibration

    ◇ Differential Receive Power Input

    ◇ Scalable Dynamic Range

    ◇ Internal Direct-to-Digital Temperature Sensor

    ◇ Alarm and Warning Flags for All Monitored Channels

◆ 10-Bit DAC with Temperature Compensation for APD Bias

◆ Digital I/O Pins: Transmit Disable Input/Output, Rate Select Input, LOS Input/Output, Transmit Fault Input/Output, and IN1 Status Monitor and Fault input

◆ Comprehensive Fault Measurement System with Maskable Alarm/Warnings

◆ Flexible Password Scheme Provides Three Levels of Security

◆ 256-Byte A0h and 128-Byte Upper A2h EEPROM

◆ I2C-Compatible Interface

◆ 3-Wire Master to Communicate with the MAX3710/ MAX3711 Laser Driver/Limiting Amplifier and MAX3945 Limiting Amplifier

Applications

    SFF, SFP, and PON ONU Modules