LM393LVDR.A datasheet(31/71 Pages) TI2

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LM393LVDR.A 数据表(PDF) 31 Page - Texas Instruments

部件名	LM393LVDR.A

功能描述	TL331LV, TL391LV, LM393LV and LM339LV Low Voltage Rail to Rail Input Comparators

PDF	71 Pages

Scroll/Zoom	100%

制造商	TI2 [Texas Instruments]

网页	https://www.ti.com

标志

31 / 71 page

7.2.8 Zero Crossing Detector

100 NŸ

5 NŸ

VIN

20 0Ÿ

10 NŸ

100 NŸ

BAT54

VOUT

R1 = R2 = (R5 / 2)

RPU

10 NŸ

Figure 7-17. Zero Crossing Detector

A voltage divider of R4 and R5 establishes a reference voltage V1 at the non-inverting input. By making the

series resistance of R1 and R2 equal to R5, the comparator will switch when VIN = 0. Diode D1 insures that

V3 clamps near ground. The voltage divider of R2 and R3 then prevents V2 from going below ground. A small

amount of hysteresis is setup to ensure rapid output voltage transitions.

www.ti.com

TL331LV, TL391LV, LM393LV, LM339LV

SNOSDA4D – JUNE 2020 – REVISED NOVEMBER 2023

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Product Folder Links: TL331LV TL391LV LM393LV LM339LV

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