19-6259; Rev 1; 8/12
DS1886
SFP and PON ONU Controller
with Digital LDD Interface
General Description
Features
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-
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
digital converter (ADC) monitors V , temperature, laser
CC
S Temperature Lookup Table (LUT) to Compensate
for APC Tracking Error and Dual Closed-Loop
Variables
bias, laser modulation, and receive power to meet all
monitoring requirements. Receive power measurement
is differential with support for common mode to V . A
CC
9-bit digital-to-analog converter (DAC) is included with
temperature compensation for APD bias control.
S 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
Applications
SFF, SFP, and PON ONU Modules
Ordering Information appears at end of data sheet.
S 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
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
2
S I C-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 Maxim’s website at www.maxim-ic.com.
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