OPA337: Doubt in application note "Signal conditioning for piezoelectric sensors"

Hi Miheer,

In this application note you noted:

The page 4 expression involving "5.85" in the denominator is the result of evaluating Equation 7 at 5Hz:

From Figure 6 schematic:

RFB= 270M

CFB = 680pF

So, the denominator "value" at f = 5Hz is:

SQRT (1+ [(270M). (680pF). 2*pi().  5Hz]^2) = SQRT (34.3) = 5.85

Hope this answers your question.

Regards,

Hooman