Rainbow-electronics MAX6677 Manual do Utilizador descarregar pdf (Página 1)

General Description

The MAX6676/MAX6677 are high-accuracy, low-power

temperature sensors with a single-wire output. The

MAX6676/MAX6677 convert the ambient temperature

into a ratiometric PWM output with temperature informa-

tion contained in the duty cycle of the output square

wave. The MAX6676 has an open-drain output and the

MAX6677 has a push-pull output.

The MAX6676/MAX6677 are specified for operation

with power-supply voltages from 1.8V to 3.6V, or from

3.6V to 5.5V. The typical unloaded supply current is

80µA. All devices feature a single-wire output that mini-

mizes the number of pins necessary to interface with a

microprocessor (µP). The output is a square wave with

a nominal frequency of 1.8kHz (±20%) at +25°C. The

output format is decoded as follows:

Temperature (°C) = 398.15

/ t

) - 273.15

Where t

is fixed with a typical value of 0.24ms and t

modulated by the temperature. The MAX6676/

MAX6677 operate from -40°C to +125°C and are avail-

able in space-saving 6-pin SOT23 packages.

Applications

Process Control

Industrial

HVAC and Environmental Control

Automotive

Portable Devices

µP and µC Temperature Monitoring

Isolated Temperature Sensing

Features

♦ Simple Single-Wire, 1.8kHz PWM Output

♦ Operates Down to 1.8V

♦ High Accuracy

±1.5°C at T

= +25°C

±3.0°C at T

= 0°C to +85°C

♦ Operates from -40°C to +125°C

♦ Low 80µA Typical Current Consumption

♦ Small 6-Pin SOT23 Package

MAX6676/MAX6677

Low-Voltage, 1.8kHz PWM Output Temperature

Sensors

________________________________________________________________ Maxim Integrated Products 1

GND

GNDV

16GND

5 GND

DOUT

MAX6676

MAX6677

SOT23

TOP VIEW

Pin Configuration

Ordering Information

*REQUIRED ONLY FOR MAX6676.

5.1kΩ*

GND

DOUT

µC

INPUT TO

TIMER/COUNTER

MAX6676

0.1µF

Typical Operating Circuit

19-2660; Rev 0; 10/02

*Future product—contact factory for availability.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART

TEMP

RANGE

PIN-

PACKAGE

MAX6676AUT3-T -40°C to +125°C 6 SOT23-6

MAX6676AUT5-T* -40°C to +125°C 6 SOT23-6

MAX6677AUT3-T* -40°C to +125°C 6 SOT23-6

MAX6677AUT5-T* -40°C to +125°C 6 SOT23-6

PART

OUTPUT

TYPE

SUPPLY

VOLTAGE

RANGE (V)

TOP

MARK

MAX6676AUT3 Open drain 1.8 to 3.6 ABBF

MAX6676AUT5 Open drain 3.6 to 5.5 ABBG

MAX6677AUT3 Push-pull 1.8 to 3.6 ABBH

MAX6677AUT5 Push-pull 3.6 to 5.5 ABBI

Selector Guide

1 2 3 4 5 6

MAX6676/MAX6677 1

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Página 1 - MAX6676/MAX6677

General DescriptionThe MAX6676/MAX6677 are high-accuracy, low-powertemperature sensors with a single-wire output. TheMAX6676/MAX6677 convert the ambie

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MAX6676/MAX6677Low-Voltage, 1.8kHz PWM Output TemperatureSensors2 ____________________________________________________________________________________

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MAX6676/MAX6677Low-Voltage, 1.8kHz PWM Output TemperatureSensors______________________________________________________________________________________

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MAX6676/MAX6677Low-Voltage, 1.8kHz PWM Output TemperatureSensors4 ____________________________________________________________________________________

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MAX6676/MAX6677Low-Voltage, 1.8kHz PWM Output TemperatureSensors______________________________________________________________________________________

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MAX6676/MAX6677Low-Voltage, 1.8kHz PWM Output TemperatureSensorsMaxim cannot assume responsibility for use of any circuitry other than circuitry entir

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