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參數(shù)資料
| 型號： | DS1722 |
| 英文描述： | Digital Thermometer with SPI/3-Wire Interface |
| 文件頁數(shù)： | 4/13頁 |
| 文件大?。?/td> | 984K |
| 代理商： | DS1722 |
DS1722
4 of 13
The resolution of the temperature conversion is configurable (8, 9, 10, 11, or 12 bits), with 9-bit readings
the default state. This equates to a temperature resolution of 1.0
°
C, 0.5
°
C, 0.25
°
C, 0.125
°
C, or 0.0625
°
C.
Following each conversion, thermal data is stored in the thermometer register in two’s complement
format; the information can be retrieved over the SPI or 3-wire interface with the address set to the
temperature register, 01h (LSB) and then 02h (MSB). Table 2 describes the exact relationship of output
data to measured temperature. The table assumes the DS1722 is configured for 12-bit resolution; if the
device is configured in a lower resolution mode, those bits will contain 0s. The data is transmitted
serially over the digital interface, MSb first for SPI communication and LSb first for 3-wire
communication. The MSb of the temperature register contains the “sign” (S) bit, denoting whether the
temperature is positive or negative. For Fahrenheit usage, a lookup table or conversion routine must be
used.
Temperature/Data Relationships
Table 2
Address
Location
S
2
6
2
5
2
4
2
3
2
2
2
1
2
0
02h
MSb
(unit =
°
C)
LSb
2
-1
2
-2
2
-3
2
-4
0
0
0
0
01h
TEMPERATURE
+120
°
C
+25.0625
°
C
+10.125
°
C
+0.5
°
C
0
°
C
-0.5
°
C
-10.125
°
C
-25.0625
°
C
-55
°
C
DIGITAL OUTPUT
(BINARY)
0111 1000 0000 0000
DIGITAL OUTPUT
(HEX)
7800h
0001 1001 0001 0000
1910h
0000 1010 0010 0000
0A20h
0000 0000 1000 0000
0080h
0000 0000 0000 0000
0000h
1111 1111 1000 0000
FF80h
1111 0101 1110 0000
F5E0h
1110 0110 1111 0000
E6F0h
1100 1001 0000 0000
C900h
OPERATION-Programming
The area of interest in programming the DS1722 is the Configuration register. All programming is done
via the SPI or 3-wire communication interface by selecting the appropriate address of the desired register
location. Table 3 illustrates the addresses for the two registers (configuration and temperature) of the
DS1722.
Register Address Structure
Table 3
Read Address
00h
01h
02h
Write Address
80h
No access
No access
Active Register
Configuration
Temperature LSB
Temperature MSB
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1722S | 功能描述:板上安裝溫度傳感器 Digital Thermometer & Thermostat 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(shù)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(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| DS1722S/T&R | 制造商:Maxim Integrated Products 功能描述:SPI 3-WIRE THERMOMETER SOIC T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERMOMETER DIG 3-WIRE 8-SOIC |
| DS1722S/T&R | 功能描述:板上安裝溫度傳感器 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(shù)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(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| DS1722S+ | 功能描述:板上安裝溫度傳感器 Digital Thermometer & Thermostat 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(shù)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(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| DS1722S+T&R | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL 3-WIRE/SPI 8SOIC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERMOMETER DIG 3-WIRE 8-SOIC |
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