Microchip MCP9802 Manual

Microchip Ikke kategoriseret MCP9802

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www.microchip.com

www.microchip.com/analogtools

Analog & Interface Solutions

Fall 2012

Signal Chain Design Guide

Devices For Use With Sensors

Design ideas in this guide use the following devices.

A complete device list and corresponding data sheets for these products can be found at www.microchip.com/analog.

Operational

Ampliﬁers

Instrumentation

Ampliﬁers

Comparators Analog-to-Digital

Converters

Digital

Potentiometers

Digital-to-Analog

Converters

Voltage

References

Temperature

Sensors

MCP6XX

MCP6XXX

MCP6VXX

MCP6HXX

MCP6NXX MCP654X

MCP656X

MCP65R4X

MCP30XX

MCP32XX

MCP33XX

MCP34XX

MCP35XX

MCP39XX

MCP40XX

MCP40D1X

MCP41XX

MCP42XX

MCP43XX

MCP45XX

MCP46XX

MCP41XXX

MCP42XXX

MCP47XX

MCP48XX

MCP49XX

MCP47DA1

MCP47A1

TC132X

MCP1525

MCP1541

MCP98XX

MCP9700/A

MCP9701/A

2Signal Chain Design Guide

Signal Chain Overview

Typical Sensor Signal Chain Control Loop

Digital DomainAnalog Domain

Driver

(MOSFET)

Op Amp DAC/PWM

Actuators

Motors, Valves,

Relays, Switches,

Speakers, Horns,

LEDs

ADC/

V-to-Freq

Amp

Sensors

Filter

Reference

Voltage

MUX

PIC® MCU

or dsPIC®

DSC

Indicator

(LCD, LED)

Digital

Potentiometer

Typical sensor applications involve the monitoring of

sensor parameters and controlling of actuators. The

sensor signal chain, as shown below, consists of analog

and digital domains. Typical sensors output very low

amplitude analog signals. These weak analog signals

are amplified and filtered, and converted to digital values

using op amps, analog-to-digital or voltage-to-frequency

converters, and are processed at the MCU. The analog

sensor output typically needs proper signal conditioning

before it gets converted to a digital signal.

The MCU controls the actuators and maintains the

operation of the sensor signal conditioning circuits based

on the condition of the signal detection. In the digital

to analog feedback path, the digital-to-analog converter

(DAC), digital potentiometer and Pulse-Width-Modulator

(PWM) devices are most commonly used. The MOSFET

driver is commonly used for the interface between the

feedback circuit and actuators such as motors and valves.

Microchip offers a large portfolio of devices for signal

chain applications.

Produkt Specifikationer

Mærke:	Microchip
Kategori:	Ikke kategoriseret
Model:	MCP9802

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