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DS1886
SFP and PON ONU Controller with Digital LDD Interface
Works with MAX3710 and MAX3711 LDD/Limiting Amp to Implement Extinction Ratio Control
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Key Features
Applications/Uses
Parametric specs for Fiber Monitoring and Control
| ADCs | 5-Input Muxable |
| Resolution (bits) | 13 |
| # DACs/ Resistors | 2 DACs |
| FS Out (kΩ) | None |
| Steps | None |
| Temp. Sensor | Internal |
| Memory | EEPROM |
| VSUPPLY (V) | 2.85 to 3.9 |
| Control Interface | I2C |
| Package/Pins | TQFN/24 |
| Budgetary Price (See Notes) | 1.39 |
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Simplified Block Diagram
Technical Docs
| Data Sheet | SFP and PON ONU Controller with Digital LDD Interface | Aug 09, 2012 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Parameters
Parametric specs for Fiber Monitoring and Control
| ADCs | 5-Input Muxable |
| Resolution (bits) | 13 |
| # DACs/ Resistors | 2 DACs |
| FS Out (kΩ) | None |
| Steps | None |
| Temp. Sensor | Internal |
| Memory | EEPROM |
| VSUPPLY (V) | 2.85 to 3.9 |
| Control Interface | I2C |
| Package/Pins | TQFN/24 |
| Budgetary Price (See Notes) | 1.39 |
Key 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/Output, 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/Uses
- SFF, SFP, and PON ONU Modules
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 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.
Technical Docs
| Data Sheet | SFP and PON ONU Controller with Digital LDD Interface | Aug 09, 2012 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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