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AD5700-1 HART_OUT connection

Question asked by ogura.isao@sankyosha.co.jp on Aug 2, 2018
Latest reply on Aug 2, 2018 by rrosario

I use EVAL-AD5700-1EBZ to connect to RSET of EVAL-AD5422LFEBZ based on the description in the section 'Circuit Evaluation & Test' in the following page.

 

http://www.analog.com/en/design-center/reference-designs/hardware-reference-design/circuits-from-the-lab/cn0278.html#rd-evaluationNtest

 

In the description, the connection is shown as the attached file.

However, EAVL-AD5700-1EBZ itself has C12(22nF) between HART_OUT pin and GND and C14(2.2uF) between HART_OUT pin to HART_OUT borad termial. they are NOT show in the description and CN0278.

How do they work and affect on HART_OUT signal?

Do I need to remove them?

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