AN4451 datasheet(10/15 Pages) STMICROELECTRONICS

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AN4451 数据表(PDF) 10 Page - STMicroelectronics

部件名	AN4451

功能描述	Signal conditioning for a UV sensor

PDF	15 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

10 / 15 page

Stability of the UV sensor

AN4451

10/15

DocID025985 Rev 1

A second order equation can be deduced as shown in formula (12).

So, we can deduce the minimum feedback capacitance of Cf to guaranty stability of the

OA1MPA, is shown in formula (13).

In this application, GBP = 120 kHz, Cg = 103 pF, and Rf = 8.2 MΩ. Using formula (13), we

can calculate that the minimum feedback capacitance of Cf is 4.2 pF.

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