MCP6561 查看數據表（PDF） - Microchip Technology

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MCP6561

1.8V Low Power Push-Pull Output Comparator

Microchip Technology 

4.9 Typical Applications

4.9.1 PRECISE COMPARATOR

Some applications require higher DC precision. An

easy way to solve this problem is to use an amplifier

(such as the MCP6291) to gain-up the input signal

before it reaches the comparator. Figure 4-12 shows

an example of this approach.

VREF

VDD

MCP6291

VIN

R1

R2

VREF

VDD

MCP656X

VOUT

FIGURE 4-12:

Comparator.

Precise Inverting

4.9.2 WINDOWED COMPARATOR

Figure 4-13 shows one approach to designing a

windowed comparator. The AND gate produces a logic

‘1’ when the input voltage is between VRB and VRT

(where VRT > VRB).

VRT

VDD

1/2

MCP6562

VIN

VRB

1/2

MCP6562

FIGURE 4-13:

Windowed Comparator.

MCP6561/1R/1U/2/4

4.9.3 BISTABLE MULTI-VIBRATOR

A simple bistable multi-vibrator design is shown in

Figure 4-14. VREF needs to be between the power

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

The output duty cycle changes with VREF.

R1

VREF

R2

VDD

MCP6561

VOUT

C1

R3

FIGURE 4-14:

Bistable Multi-vibrator.

© 2009 Microchip Technology Inc.

DS22139B-page 19

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