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MAX3941

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10Gbps EAM Driver with Integrated Bias Network

10.7Gbps Packaged Electro-Absorption Modulator (EAM) Driver with Integrated Bias T

Data Sheet (Rev. 0) Product Selection Table
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Overview

  • On-Chip Bias Network
  • 23ps Edge Speed
  • Programmable Modulation Voltage Up to 3VP-P
  • Programmable EAM Biasing Voltage Up to 1.25V
  • Selectable Data-Retiming Latch
  • Up to 10.7Gbps Operation
  • Integrated Modulation and Biasing Functions
  • 50Ω On-Chip Input and Output Terminations
  • Pulse-Width Adjustment
  • Enable and Polarity Controls
  • ESD Protection

The MAX3941 is designed to drive an electro-absorption modulator (EAM) at data rates up to 10.7Gbps. It incorporates the functions of a biasing circuit and a modulation circuit, with integrated control op amps externally programmed by DC voltages.

The integrated bias circuit provides a programmable biasing current up to 50mA. This bias current reflects a bias voltage of up to 1.25V on an external 50Ω load. The bias and modulation circuits are internally connected on chip, eliminating the need for an external bias inductor.

A high-bandwidth, fully differential signal path is internally implemented to minimize jitter accumulation. When a clock signal is available, the integrated data-retiming function can be selected to reject input-signal jitter. The MAX3941 receives differential CML signals (ground referenced) with on-chip line terminations of 50Ω. The output has a 50Ω resistor for back termination and is able to deliver a modulation current of 40mAP-P to 120mAP-P, with an edge speed of 23ps (20% to 80% typ). This modulation current reflects an EAM modulation voltage of 1.0VP-P to 3.0VP-P.

The MAX3941 also includes an adjustable pulse-width control circuit to precompensate for asymmetrical EAM characteristics. It is available in a compact 4mm x 4mm, 24-pin thin QFN package and operates over the -40°C to +85°C temperature range.

Applications

  • 10Gbps Ethernet
  • DWDM Systems
  • Long/Short-Reach Optical Transmitters
  • SONET OC-192 and SDH STM-64
  • Transmission Systems
MAX3941
10Gbps EAM Driver with Integrated Bias Network
MAX3941: Typical Application Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 2

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Tools & Simulations

IBIS Model 1

Evaluation Kits

MAX3941EVKIT

Evaluation Kit for the MAX3941

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Features and Benefits

  • SMA Connectors for All High-Speed I/Os
  • Configured for Electrical Operation, No Laser Necessary
  • Single -5.2V Power-Supply Operation
  • Fully Assembled and Tested

Product Details

The MAX3941 evaluation kit (EV kit) is an assembled demonstration board that provides electrical evaluation of the MAX3941 10.7Gbps EAM driver. The output is interfaced to an SMA connector that can be connected to a 50Ω terminated oscilloscope.

Applications

  • 10Gbps Ethernet
  • DWDM Systems
  • Long/Short-Reach Optical Transmitters
  • SONET OC-192 and SDH STM-64
  • Transmission Systems
MAX3941EVKIT
Evaluation Kit for the MAX3941

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