what is this symbol means ?

Discussion in 'The Projects Forum' started by omer khater, Mar 13, 2017.

  1. omer khater

    Thread Starter New Member

    Nov 27, 2014
    13
    0
    Hi

    i try to make an optical transmitter project .one of the components i need is TEC driver (max 1968/1969)

    when i try to read its datasheet i encounter this symbol and i don't know what it mean

    can anyone help me ?

    upload_2017-3-13_21-30-35.png

    the complete datasheet is also attached
     
  2. SLK001

    Senior Member

    Nov 29, 2011
    1,337
    521
    It looks like some kind of thermal element - a resistive heater?
     
  3. MaxHeadRoom

    Expert

    Jul 18, 2013
    18,237
    5,598
    Symbol for the Peltier element.
    Max.
     
  4. omer khater

    Thread Starter New Member

    Nov 27, 2014
    13
    0
    What is the relation between it and the thermistor ,i mean why is it in one shadow box with the thermistor ?
     
  5. omer khater

    Thread Starter New Member

    Nov 27, 2014
    13
    0
    I need to connect the driver to thermistor from laser diode module but what is the stair like symobol mean ?why it in one shadow box with the thermistor ?
     
  6. OBW0549

    Distinguished Member

    Mar 2, 2015
    2,885
    2,653
    The symbol that looks like a stair, or a ladder, represents the Peltier thermoelectric cooler element itself. It is shown in a dashed-line box with the thermistor to indicate they are in close thermal contact.
     
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  7. AnalogKid

    AAC Fanatic!

    Aug 1, 2013
    7,844
    2,208
    The thermistor is there to close the temperature control loop. It provides an input to the system that controls the energy to the TEC to maintain a constant temperature at the sensing point, which probably is near the laser diode.

    ak
     
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