DS1886 Datasheet, PDF(1/92 Page) Maxim Integrated Products – SFP and PON ONU Controller with Digital LDD Interface

19-6259; Rev 0; 3/12

DS1886

SFP and PON ONU Controller

with Digital LDD Interface

General Description

The DS1886 controls and monitors all functions for SFF,

SFP, and SFP+ modules including all SFF-8472 func-

tionality for GPON/EPON and 10G PON ONU applica-

tions. The combination of the DS1886 with the MAX3710

supports all transmitter and receiver functionality. The

DS1886 includes modulation current control and APC set-

point control with tracking error adjustment. It continually

monitors RSSI for LOS generation. A 13-bit analog-to-

digital converter (ADC) monitors VCC, temperature, laser

bias, laser modulation, and receive power to meet all

monitoring requirements. Receive power measurement

is differential with support for common mode to VCC. A

9-bit digital-to-analog converter (DAC) is included with

temperature compensation for APD bias control.

Applications

SFF, SFP, and PON ONU Modules

Ordering Information appears at end of data sheet.

Features

S Meets All SFF-8472 Control and Monitoring

Requirements

S Companion Controller for the MAX3710 Laser

Driver/Limiting Amplifier and MAX3945 Limiting

Amplifier

S MAX3710/DS1886 Combination Supports

Broad Spectrum of Continuous Mode and PON

Applications Up to 2.5GHz

S Temperature Lookup Table (LUT) to Compensate

for APC Tracking Error and Dual Closed-Loop

Variables

S Three Laser Control Modes

ï² Dual Closed Loop: Laser Bias and Laser

Modulation Are Automatically Controlled with

Multiple LUTs to Compensate Dual Closed-Loop

Calibration Points

ï² APC Loop: Laser Bias Automatically Controlled,

Laser Modulation Controlled by Temperature LUT

ï² Open Loop: Laser Bias and Laser Modulation

Are Controlled by Temperature LUTs

S 13-Bit ADC

ï² Laser Bias, Laser Power, and Receive Power

Support Internal and External Calibration

ï² Differential Receive Power Input

ï² Scalable Dynamic Range

ï² Internal Direct-to-Digital Temperature Sensor

ï² Alarm and Warning Flags for All Monitored

Channels

S 10-Bit DAC with Temperature Compensation for

APD Bias

S 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

S Comprehensive Fault Measurement System with

Maskable Alarm/Warnings

S Flexible Password Scheme Provides Three Levels

of Security

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

S I2C-Compatible Interface

S 3-Wire Master to Communicate with the MAX3710/

MAX3711 Laser Driver/Limiting Amplifier and

MAX3945 Limiting Amplifier

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maximâs website at www.maxim-ic.com.

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