use ADP2360 as a current source

hi

i want to use ADP2360 as a current source in my design. so i connected FB pin to a current shunt resistor .

i intend to get 20ma current over temprature range -40 to 85 .

ADP2360 has an internal 0.8v internal reference voltage and i am worry about drift of this voltage .

 

i am worry about drift of current over temperature range of -40 to 85 .i need my current to remain as well constant in this whole range. (0.05ma drift at worst case).

 

in device like ADP2441 there is a TRK pin which you can apply a voltage by a low drift voltage reference but in  ADP2360  there is no such pin.

is ADP2360 a right solution for my design?

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  • hi

    my end application is electromagnetic flow meter. and i want a current source for coil excitation.

    according to this article :

    http://www.analog.com/en/analog-dialogue/articles/electromagnetic-flow-meters.html

    analog devices suggested these two switching regulators for current source :

    Table 5. Recommended Switching Regulators

    Recommended ADI Switching Regulators Efficiency

    ADP2441 90% at 200 mA output (@12 V), up to 1 A capable

    ADP2360 90% at 10 mA output, up to 50 mA capable

    in my design due to the arrangement and number of turns of coils i need a 20ma current source for coil excitation.

    as ADP2441 efficiency is low @ 20ma so i decided to use ADP2360 . but now due to your statement it dosn't seem a right choice .

    what is analog devices right solution according to my system requirements?

    On Mon, Apr 2, 2018 at 11:08 AM, jeco <

Reply
  • hi

    my end application is electromagnetic flow meter. and i want a current source for coil excitation.

    according to this article :

    http://www.analog.com/en/analog-dialogue/articles/electromagnetic-flow-meters.html

    analog devices suggested these two switching regulators for current source :

    Table 5. Recommended Switching Regulators

    Recommended ADI Switching Regulators Efficiency

    ADP2441 90% at 200 mA output (@12 V), up to 1 A capable

    ADP2360 90% at 10 mA output, up to 50 mA capable

    in my design due to the arrangement and number of turns of coils i need a 20ma current source for coil excitation.

    as ADP2441 efficiency is low @ 20ma so i decided to use ADP2360 . but now due to your statement it dosn't seem a right choice .

    what is analog devices right solution according to my system requirements?

    On Mon, Apr 2, 2018 at 11:08 AM, jeco <

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