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ADN8831:  A HIGH EFFICIENCY TEC CONTROLLER SOLUTION

The ADN8831 is a highly integrated solution for controlling the TEC in a laser module used in optical communications systems. It features greater than 90% efficiency and lower than 1% ripple noise together to complete a TEC control function. It also features system-supervising functions such as real temp monitoring, temp lock indication, current limit, switching frequency and phase changeability. ...More

ADN8831:  A HIGH EFFICIENCY TEC CONTROLLER SOLUTION

Product Description

The ADN8831 is a highly integrated solution for controlling the TEC in a laser module used in optical communications systems. It features greater than 90% efficiency and lower than 1% ripple noise together to complete a TEC control function. It also features system-supervising functions such as real temp monitoring, temp lock indication, current limit, switching frequency and phase changeability. Its wave lock input allows Optical equipment designers to build a dual TEC control loop by using both Thermistor and wavelockers. Its 5mm x 5mm tiny chip-scale package saves valuable board space.

The ADN8831 addresses key design challenges:

  • The single inductor output saves lots of board space, which is especially important for small form-factor designs.
  • Integrating the thermistor and compensation amplifiers along with the output protection circuitry lowers the overall cost and size of the design.
  • Because the output FETs are external, designers can choose the appropriate sized FETs for their TEC current requirements. Not only does this provide the best power efficiency, it also provides the best overall cost.

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    TECHNICAL DOCUMENTATION

    • True current sensing and over current protection
    • Separate heating and cooling current limits
    • High efficiency: >90%
    • Long-term temperature stability: <0.01°C
    • Temperature lock indication
    • Temperature monitoring output
    • Programmable maximum TEC voltage
    • Oscillator synchronization with an external signal
    • Clock phase adjustment for multiple controllers
    • Programmable switching frequency up to 1 MHz
    • Low noise: <0.05% TEC current ripple
    • Compact 5mm x 5mm LFCSP

    Functional Block Diagram for ADN8831

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    *The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.