Adafruit 1-Wire MAX31850K 熱電偶放大器模組

MAX31850K可以為您提供所有功能，並且可以輕鬆與任何具有1-Wire支持的微控制器連接。

MAX31850是Maxim（美信半導體）旗下的一款1-Wire器件產品，MAX31850是冷端補償、1-Wire熱電偶至數字轉換器,並且具備高精度1-Wire熱電偶至數字轉換器IC，既節省設計投入又降低系統成本。

此款適用於任何K型熱電偶，器件通過1-Wire總線與主機微控制器通信，只需要一根數據線(及地)。器件可直接由數據線供電(“寄生供電”)，省去了外部電源。
每個器件具有唯一的64位串號，允許多個器件在同一1-Wire總線上工作。因此，很容易利用一個微控制器(主機)控制分佈在較大區域的多個熱電偶。
四個位置地址輸入，簡化了器件與特定位置的映射。

請注意：該板在3V數據線上沒有電平轉換。

Thermocouples are very sensitive, requiring a good amplifier with a cold-compensation reference. So far we've carried the very nice MAX31855 which is an SPI interface thermocouple amplifier. The '855 is great but if you have a lot of thermocouples to measure it isn't terribly easy to use. That's why we are also carrying the new '850 model from Maxim - it's a "1-Wire" thermocouple amp which can have any number of breakouts on a single shared I/O line.

The MAX31850K does everything for you, and can be easily interfaced with any microcontroller that has 1-Wire support. This breakout board has the chip itself, a 3.3V regulator with 10uF bypass capacitors all assembled and tested. This board can be used with 'parasitic power' - where the power is on the data line - or with 'local power' where the power for the converter comes in on the Vin Pin.

Please note: this board does not have level shifting on the 3V Data line - we did this on purpose so that it can be used in parasitic mode. The data line must be level shifted to 3V - our 4-channel shifter works wonderfully for level shifting 1-Wire and you only need one at the '1-Wire host' for all thermocouples on the shared data line.

The MAX31850K data format is very similar to that of the well known 1-Wire DS18B20 temp sensor but it is not drop in compatible without code changes to check for the new '1 Wire family' type. We have adapted the classic Arduino OneWire and DallasTemp libraries to be MAX31850 compatible, so please click on those links to grab our libraries.

Comes with a 2 pin terminal block (for connecting to the thermocouple), 4.7K data line pullup resistor, and pin header (to plug into any breadboard or perfboard). Goes great with our 1m K-type thermocouple. Not for use with any other kind of thermocouple, K type only!

【產品規格】

【文件下載】

EagleCAD PCB files, Fritzing object, datasheets and more in the tutorial