MAX24002

1.25Gbps to 2.5Gbps SFP Laser Transceiver

2.5Gbps Transceiver with Integrated DDM and APD Controller

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Features

1.25Gbps to 2.5Gbps Limiting Receiver
Integrated APD Bias Loop with Overvoltage and Overcurrent Protection
OMA-Based LOS Detection
1.25Gbps to 2.5Gbps Laser Driver
CML, LVPECL-Compatible Inputs
Open and Closed-Loop Bias Control
Temperature-Compensated I_MOD Control
Highly Configurable Laser Safety System
SFP MSA and SFF-8472 Digital Diagnostics
Integrated Temperature Sensor
External DAC, ADC, and PWM Interfaces

Additional Details

The MAX24002 is a complete laser driver transmitter and limiting amplifier receiver for use within fiber optic modules for SFP applications. A fully compliant SFP module with digital diagnostics is realized when used with a 2KB EEPROM and suitable optics. Alternatively, a microcontroller is used in conjunction with the MAX24002; however, this is not a necessity to achieve SFF-8472 compliance.

The 2.5Gbps limiting receive path features programmable output swing control, rate selection, and OMA-based loss-of-signal detection. Functions are also provided that facilitate the implementation of APD biasing without the need for an external DC-DC converter.

The laser driver has temperature-compensated modulation control using a lookup table. Closed-loop control of laser power incorporates tracking error compensation. This is linked to a laser safety system which allows the modulation and bias currents to be shut off in response to a range of different fault conditions detected on-chip.

The MAX24002 is highly configurable from either EEPROM or a low-cost microcontroller using a two-wire interface.

Applications