iDAC current mirror for increased compliance voltage

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Dirk_6716
Level 2
Level 2
10 sign-ins 10 replies posted 10 questions asked

Hello,

I want to extend the compliance voltage of the iDAC to 20V using a current mirror such that I can apply 0~100uA DC current over a wide range of loads.

Increasing Voltage Compliance with iDAC and Current Mirror

The above thread suggests a Wilson current mirror.

How would the iDAC and load be connected with respect to the schematic above. And which BJTs are recommended (small footprint desired over accuracy)? Would the BCV61 or BCV62 transistors work?

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Vasanth
Moderator
Moderator
Moderator
250 sign-ins 500 solutions authored First question asked

Hi,     

Kindly check this thread too.

How built a 4-20 mA IDAC

Best Regards,
Vasanth

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1 Reply
Vasanth
Moderator
Moderator
Moderator
250 sign-ins 500 solutions authored First question asked

Hi,     

Kindly check this thread too.

How built a 4-20 mA IDAC

Best Regards,
Vasanth

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