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参数资料
| 型号： | DS1720S |
| 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, SOIC-8 |
| 文件页数： | 10/14页 |
| 文件大小： | 173K |
| 代理商： | DS1720S |
DS1720
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Higher resolutions may be obtained by reading the temperature, and truncating the 0.
5°C bit (the LSB)
from the read value. This value is TEMP_READ. The value left in the counter may then be read by
issuing a READ COUNTER command. This value is the count remaining (COUNT_REMAIN) after the
gate period has ceased. The value of the slope accumulator may be read (using the READ SLOPE
command), yielding the number of counts per degree C (COUNT_PER_C) at that temperature. The actual
temperature may be then be calculated by the user using the following:
TEMPERATURE = TEMP_READ – 0.25 +
DETAILED PIN DESCRIPTION Table 2
PIN
SYMBOL
DESCRIPTION
1
DQ
Data Input/Output pin for 3–wire communication port.
2
CLK/ CONV
Clock input pin for 3–wire communication port. When the DS1720 is used in
a stand–alone application with no 3–wire port, this pin can be used as a
convert pin. Temperature conversion will begin on the falling edge of CONV .
3
RST
Reset input pin for 3–wire communication port.
4
GND
Ground pin.
5
TCOM
High/Low Combination Trigger. Goes high when temperature exceeds TH;
will reset to low when temperature falls below TL.
6
TLOW
Low Temperature Trigger. Goes high when temperature falls below TL.
7
THIGH
High Temperature Trigger. Goes high when temperature exceeds TH.
8
VDD
Supply Voltage. 2.7V – 5.5V input power pin.
OPERATION–THERMOSTAT CONTROLS
Three thermally triggered outputs, THIGH, TLOW, and TCOM, are provided to allow the DS1720 to be used
as a thermostat, as shown in Figure 3. When the DS1720’s temperature meets or exceeds the value stored
in the high temperature trip register, the output THIGH becomes active (high) and remains active until the
DS1720’s measured temperature becomes less than the stored value in the high temperature register, TH.
The THIGH output can be used to indicate that a high temperature tolerance boundary has been met or
exceeded, or as part of a closed loop system can be used to activate a cooling system and to deactivate it
when the system temperature returns to tolerance.
The TLOW output functions similarly to the THIGH output. When the DS1720’s measured temperature
equals or falls below the value stored in the low temperature register, the TLOW output becomes active.
TLOW remains active until the DS1720’s temperature becomes greater than the value stored in the low
temperature register, TL. The TLOW output can be used to indicate that a low temperature tolerance
boundary has been met or exceeded, or as part of a closed loop system, can be used to activate a heating
system and to deactivate it when the system temperature returns to tolerance.
The TCOM output goes high when the measured temperature meets or exceeds TH, and will stay high until
the temperature equals or falls below TL. In this way, any amount of hysteresis can be obtained.
(COUNT_PER_C– COUNT_REMAIN)
COUNT_PER_C
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1720S/T&R | 制造商:Maxim Integrated Products 功能描述:DIGITAL THERMOMETER/THERMOSTAT T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERMOMETER/STAT DIG 8-SOIC |
| DS1720S/T&R | 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 |
| DS1720S+ | 功能描述:板上安装温度传感器 Digital Thermometer & Thermostat 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 |
| DS1720S+T&R | 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL 3-WIRE 8SOIC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERMOMETER/STAT DIG 8-SOIC |
| DS1720S+T&R | 功能描述:板上安装温度传感器 Digital Thermometer & Thermostat 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 |
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