MCP6541-ESLASHMS datasheet(18/34 Pages) MICROCHIP

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MCP6541/1R/1U/2/3/4

DS21696E-page 18

4.10

Typical Applications

4.10.1

PRECISE COMPARATOR

Some applications require higher DC precision. An

easy way to solve this problem is to use an amplifier

(such as the MCP6041) to gain-up the input signal

before it reaches the comparator. Figure 4-11 shows an

example of this approach.

FIGURE 4-11:

Precise Inverting

Comparator.

4.10.2

WINDOWED COMPARATOR

Figure 4-12 shows one approach to designing a win-

dowed comparator. The AND gate produces a logic ‘1’

when the input voltage is between VRB and VRT (where

VRT > VRB).

FIGURE 4-12:

Windowed Comparator.

4.10.3

BISTABLE MULTI-VIBRATOR

A simple bistable multi-vibrator design is shown in

Figure 4-13. VREF needs to be between the power

supplies (VSS = GND and VDD) to achieve oscillation.

The output duty cycle changes with VREF.

FIGURE 4-13:

Bistable Multi-vibrator.

VREF

VDD

VOUT

VIN

VREF

MCP6041

MCP654X

VRT

MCP6542

VRB

VIN

1/2

MCP6542

1/2

MCP6541

VDD

VREF

VOUT

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