LT3092 is used to excite the ICP vibration sensor. The current output current is set at 150uA. According to the manual, the minimum output current is 0.5mA.Will it damage the chip?If this is not appropriate, what is the recommended constant current source for the output current of about 100uA?
This is the description in the manual:
Note 3: Minimum load current is equivalent to the quiescent current of
The part Since all quiescent and drive current is delivered to the output
Of the part, the minimum load current is the minimum current required to
The 0.5mA value is a parameter which is dependent on production effects, hence it will be smaller but from characterization results it will never be higher. To obtain a reliable current smaller than 500uA you have to use two LT3092 in series (sink and source configuration) and configure them for I1 and I1+150uA. The 150uA will then be available between them. I would suggest to choose I1 for 1mA or so