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K型热电偶MAX6675资料.zip （18个子文件）

最新K型热电偶MAX6675资料

K型热电偶MAX6675资料

K型热电偶MAX6675使用指南.pdf 85KB

MAX6675_www.ic37.com.pdf 130KB

原理图.jpg 88KB

程序

K型热电偶MAX6675测温程序.LST 12KB

MAX6675.plg 2KB

K型热电偶MAX6675测温程序.c 7KB

MAX6675.uvopt 56KB

MAX6675_uvopt.bak 56KB

MAX6675_Uv2.Bak 2KB

MAX6675.M51 13KB

MAX6675.opt.bak 1KB

K型热电偶MAX6675测温程序.OBJ 5KB

MAX6675.uvproj 13KB

MAX6675.hex 2KB

MAX6675.Uv2 2KB

MAX6675 3KB

MAX6675.Opt 879B

MAX6675_Opt.Bak 1KB

General Description

The MAX6675 performs cold-junction compensation

and digitizes the signal from a type-K thermocouple.

The data is output in a 12-bit resolution, SPI™-compati-

ble, read-only format.

This converter resolves temperatures to 0.25°C, allows

readings as high as +1024°C, and exhibits thermocou-

ple accuracy of 8LSBs for temperatures ranging from

0°C to +700°C.

The MAX6675 is available in a small, 8-pin SO package.

Applications

Industrial

Appliances

HVAC

Automotive

Features

♦ Direct Digital Conversion of Type -K

Thermocouple Output

♦ Cold-Junction Compensation

♦ Simple SPI-Compatible Serial Interface

♦ 12-Bit, 0.25°C Resolution

♦ Open Thermocouple Detection

MAX6675

Cold-Junction-Compensated K-Thermocouple-

to-Digital Converter (0°C to +1024°C)

________________________________________________________________ Maxim Integrated Products 1

SCKV

N.C.

SOT-

T+

GND

TOP VIEW

MAX6675

Pin Configuration

Vcc

GND

T+

T-

SCK

MICROCONTROLLER

68HC11A8

MISO

SCK

SSB

0.1µF

MAX6675

Typical Application Circuit

19-2235; Rev 1; 3/02

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.

Ordering Information

SPI is a trademark of Motorola, Inc.

PART TEMP RANGE PIN-PACKAGE

MAX6675ISA -20°C to +85°C 8 SO

MAX6675

Cold-Junction-Compensated K-Thermocouple-

to-Digital Converter (0°C to +1024°C)

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

= +3.0V to +5.5V, T

= -20°C to +85°C, unless otherwise noted. Typical values specified at +25°C.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

Supply Voltage (V

to GND) ................................ -0.3V to +6V

SO, SCK,

CS, T-, T+ to GND .......................-0.3V to V

+ 0.3V

SO Current ........................................................................ 50mA

ESD Protection (Human Body Model) ........................... ±2000V

Continuous Power Dissipation (T

= +70°C)

8-Pin SO (derate 5.88mW/°C above +70°C) .............. 471mW

Operating Temperature Range ..........................-20°C to +85°C

Storage Temperature Range ............................-65°C to +150°C

Junction Temperature .................................................... +150°C

SO Package

Vapor Phase (60s) . .....................................................+215°C

Infrared (15s) ..............................................................+220°C

Lead Temperature (soldering, 10s) ............................... +300°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

= +3.3V -5 +5

THERMOCOUPLE

= +700°C,

= +25°C (Note 2)

= +5V -6 +6

= +3.3V -8 +8

THERMOCOUPLE

= 0°C to

+700°C, T

= +25°C (Note 2)

= +5V -9 +9

= +3.3V -17

+17

Temperature Error

THERMOCOUPLE

= +700°C

to +1000°C, T

= +25°C

(Note 2)

= +5V -19

+19

LSB

Thermocouple Conversion

Constant

10.25

µV/LSB

= +3.3V

-3.0 +3.0

Cold-Junction

Compensation Error

= -20°C to +85°C

(Note 2)

= +5V

-3.0 +3.0

°C

Resolution

0.25

°C

Thermocouple Input

Impedance

60 kΩ

Supply Voltage V

3.0 5.5 V

Supply Current I

0.7 1.5 mA

Power-On Reset Threshold V

rising 1 2 2.5 V

Power-On Reset Hysteresis 50 mV

Conversion Time (Note 2)

0.17 0.22

SERIAL INTERFACE

Input Low Voltage V

0.3 x

Input High Voltage V

0.7 x

Input Leakage Current I

LEAK

= GND or V

±5µA

Input Capacitance C

5pF

MAX6675

Cold-Junction-Compensated K-Thermocouple-

to-Digital Converter (0°C to +1024°C)

_______________________________________________________________________________________ 3

04515 30 60 75 90

OUTPUT CODE ERROR

vs. AMBIENT TEMPERATURE

MAX6675 toc01

TEMPERATURE (°C)

OUTPUT CODE ERROR (LSB)

-5

-10 0 30 50

OUTPUT CODE ERROR

vs. VOLTAGE DIFFERENTIAL

MAX6675 toc02

VOLTAGE DIFFERENTIAL (mV)

OUTPUT CODE ERROR (LSB)

10 20 40

Typical Operating Characteristics

= +3.3V, T

= +25°C, unless otherwise noted.)

ELECTRICAL CHARACTERISTICS (continued)

= +3.0V to +5.5V, T

= -20°C to +85°C, unless otherwise noted. Typical values specified at +25°C.) (Note 1)

Note 1: All specifications are 100% tested at T

= +25°C. Specification limits over temperature (T

= T

MIN

to T

MAX

) are guaranteed

by design and characterization, not production tested.

Note 2: Guaranteed by design. Not production tested.

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

Output High Voltage V

SOURCE

= 1.6mA

0.4

Output Low Voltage V

SINK

= 1.6mA 0.4 V

TIMING

Serial Clock Frequency f

SCL

4.3

MHz

SCK Pulse High Width t

100

SCK Pulse Low Width t

100

CSB Fall to SCK Rise t

CSS

= 10pF

100

CSB Fall to Output Enable t

= 10pF 100 ns

CSB Rise to Output Disable t

= 10pF 100 ns

SCK Fall to Output Data

Valid

= 10pF 100 ns

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Ernestxiao

2015-10-17

好贵的芯片,只能学习用

k型热电偶检测温度c语言程序

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