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參數資料
| 型號： | MAX6675ISA |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 5/8頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CONV THERMO TO DIGITAL 8SOIC |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 100 |
| 類型： | 熱電偶調節(jié)器 |
| 輸入類型： | 邏輯 |
| 輸出類型： | 邏輯 |
| 接口： | SPI |
| 電流 - 電源： | 1.5mA |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 8-SOIC |
| 包裝： | 管件 |
Cold-Junction-Compensated K-Thermocouple-
to-Digital Converter (0°C to +1024°C)
Applications Information
Serial Interface
The Typical Application Circuit shows the MAX6675
interfaced with a microcontroller. In this example, the
MAX6675 processes the reading from the thermocou-
ple and transmits the data through a serial interface.
Force CS low and apply a clock signal at SCK to read
the results at SO. Forcing CS low immediately stops
any conversion process. Initiate a new conversion
process by forcing CS high.
Force CS low to output the first bit on the SO pin. A
complete serial interface read requires 16 clock cycles.
Read the 16 output bits on the falling edge of the clock.
The first bit, D15, is a dummy sign bit and is always
zero. Bits D14–D3 contain the converted temperature in
the order of MSB to LSB. Bit D2 is normally low and
goes high when the thermocouple input is open. D1 is
low to provide a device ID for the MAX6675 and bit D0
is three-state.
Figure 1a is the serial interface protocol and Figure 1b
shows the serial interface timing. Figure 2 is the SO out-
put.
Open Thermocouple
Bit D2 is normally low and goes high if the thermocou-
ple input is open. In order to allow the operation of the
open thermocouple detector, T- must be grounded.
Make the ground connection as close to the GND pin
as possible.
Noise Considerations
The accuracy of the MAX6675 is susceptible to power-
supply coupled noise. The effects of power-supply
noise can be minimized by placing a 0.1F ceramic
bypass capacitor close to the supply pin of the device.
Thermal Considerations
Self-heating degrades the temperature measurement
accuracy of the MAX6675 in some applications. The
magnitude of the temperature errors depends on the
thermal conductivity of the MAX6675 package, the
mounting technique, and the effects of airflow. Use a
large ground plane to improve the temperature mea-
surement accuracy of the MAX6675.
The accuracy of a thermocouple system can also be
improved by following these precautions:
Use the largest wire possible that does not shunt
heat away from the measurement area.
If small wire is required, use it only in the region of
the measurement and use extension wire for the
region with no temperature gradient.
Avoid mechanical stress and vibration, which could
strain the wires.
When using long thermocouple wires, use a twisted-
pair extension wire.
Avoid steep temperature gradients.
Try to use the thermocouple wire well within its tem-
perature rating.
Use the proper sheathing material in hostile environ-
ments to protect the thermocouple wire.
Use extension wire only at low temperatures and
only in regions of small gradients.
Keep an event log and a continuous record of ther-
mocouple resistance.
Reducing Effects of Pick-Up Noise
The input amplifier (A1) is a low-noise amplifier
designed to enable high-precision input sensing. Keep
the thermocouple and connecting wires away from
electrical noise sources.
Chip Information
TRANSISTOR COUNT: 6720
PROCESS: BiCMOS
MAX6675
Maxim Integrated
5
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX6675ISA+ | 功能描述:數據轉換 IC - 多種 K Thermocouple to Digital Converter RoHS:否 制造商:Texas Instruments 轉換器數量:1 分辨率:8 bit 工作電源電壓:2.7 V to 5.5 V 功耗: 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:MSOP-10 封裝:Reel |
| MAX6675ISA+ | 制造商:Maxim Integrated Products 功能描述:SEMICONDUCTOR ((NW)) |
| MAX6675ISA+T | 功能描述:數據轉換 IC - 多種 K Thermocouple to Digital Converter RoHS:否 制造商:Texas Instruments 轉換器數量:1 分辨率:8 bit 工作電源電壓:2.7 V to 5.5 V 功耗: 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:MSOP-10 封裝:Reel |
| MAX6675ISA-T | 功能描述:數據轉換 IC - 多種 RoHS:否 制造商:Texas Instruments 轉換器數量:1 分辨率:8 bit 工作電源電壓:2.7 V to 5.5 V 功耗: 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:MSOP-10 封裝:Reel |
| MAX6676AUT+T | 功能描述:板上安裝溫度傳感器 1.8kHz PWM Temperature Sensor RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
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