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參數(shù)資料
| 型號(hào)： | DS1720 |
| 英文描述： | Econo . Digital Thermometer and Thermostat |
| 文件頁(yè)數(shù)： | 4/12頁(yè) |
| 文件大?。?/td> | 77K |
| 代理商： | DS1720 |
T
HIGH
T
LOW
T
COM
TL
TH
T (
°
C)
DS1720
030598 4/12
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
T
COM
High/Low Combination Trigger
. Goes high when temperature exceeds TH; will
reset to low when temperature falls below TL.
6
T
LOW
Low Temperature Trigger
. Goes high when temperature falls below TL.
7
T
HIGH
High Temperature Trigger
. Goes high when temperature exceeds TH.
8
V
DD
Supply Voltage
. 2.7V – 5.5V input power pin.
OPERATION–THERMOSTAT CONTROLS
Three thermally triggered outputs, T
HIGH
, T
LOW
, and
T
COM
, 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 T
HIGH
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 T
HIGH
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 T
LOW
output functions similarly to the T
HIGH
output.
When the DS1720’s measured temperature equals or
falls below the value stored in the low temperature regis-
ter, the T
LOW
output becomes active. T
LOW
remains
active until the DS1720’s temperature becomes greater
than the value stored in the low temperature register,
TL. The T
LOW
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 T
COM
output goes high when the measured tem-
perature 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.
THERMOSTAT OUTPUT OPERATION
Figure 3
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1720S | 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(zhǔn)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(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| 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:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)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(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| DS1720S+ | 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(zhǔn)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(fēng)格: 封裝 / 箱體: 設(shè)備功能: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 |
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