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?
my end application is electromagnetic flow meter. and i want a current source for coil excitation.
according to this article :
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 <