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参数资料
| 型号： | DS1720S+T&R |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | Switch/Digital Output Temperature Sensor |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), RECTANGULAR, SURFACE MOUNT |
| 封装： | 0.208 INCH, LEAD FREE, SOIC-8 |
| 文件页数： | 9/14页 |
| 文件大小： | 173K |
| 代理商： | DS1720S+T&R |
DS1720
4 of 14
TEMPERATURE MEASURING CIRCUITRY Figure 2
This calculation is done inside the DS1720 to provide 0.
5°C resolution. The temperature reading is
provided in a 9–bit, two’s complement reading by issuing a READ TEMPERATURE command. Table 1
describes the exact relationship of output data to measured temperature. The data is transmitted serially
through the 3–wire serial interface, LSB first. The DS1720 can measure temperature over the range of
–5
5°C to +125°C in 0.5°C increments. For Fahrenheit usage, a lookup table or conversion factor must be
used.
TEMPERATURE/DATA RELATIONSHIPS Table 1
TEMP
DIGITAL OUTPUT
(Binary)
DIGITAL OUTPUT
(Hex)
+85
°C
0 10101010
00AA
+25
°C
0 00110010
0032h
+
°C
0 00000001
0001h
+0
°C
0 00000000
0000h
-
°C
1 11111111
01FFh
-25
°C
1 11001110
01CEh
Since data is transmitted over the 3–wire bus LSB first, temperature data can be written to/read from the
DS1720 as either a 9–bit word (taking RST low after the 9
th (MSB) bit), or as two transfers of 8–bit
words, with the most significant 7 bits being ignored or set to zero, as illustrated in Table 1. After the
MSB, the DS1720 will output 0s.
Note that temperature is represented in the DS1720 in terms of a
°C LSB, yielding the following 9–bit
format:
MSB
LSB
X
1
0
1
0
T = -25
°C
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1720STR | 制造商:Maxim Integrated Products 功能描述: |
| DS1721 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:2-Wire Digital Thermometer and Thermostat |
| DS1721S | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| DS1721S/T&R | 制造商:Maxim Integrated Products 功能描述:2-WIRE DIGITAL THERMOMETER SOIC T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERMOMETER/STAT DIG HP 8SOIC |
| DS1721S/T&R+W | 制造商:Maxim Integrated Products 功能描述:DIGITAL THERMOMETER AND THERMOSTAT - Tape and Reel |
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