- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄376958 > DS1720 Econo . Digital Thermometer and Thermostat PDF資料下載
參數(shù)資料
| 型號： | DS1720 |
| 英文描述： | Econo . Digital Thermometer and Thermostat |
| 文件頁數(shù)： | 2/12頁 |
| 文件大?。?/td> | 77K |
| 代理商： | DS1720 |
DS1720
030598 2/12
OPERATION–MEASURING TEMPERATURE
A block diagram of the DS1720 is shown in Figure 1.
The DS1720 measures temperatures through the use of
an on–board proprietary temperature measurement
technique. A block diagram of the temperature mea-
surement circuitry is shown in Figure 2.
The DS1720 measures temperature by counting the
number of clock cycles that an oscillator with a low tem-
perature coefficient goes through during a gate period
determined by a high temperature coefficient oscillator.
The counter is preset with a base count that corre-
sponds to –55
°
C. If the counter reaches zero before the
gate period is over, the temperature register, which is
also preset to the –55
°
C value, is incremented, indicat-
ing that the temperature is higher than –55
°
C.
At the same time, the counter is then preset with a value
determined by the slope accumulator circuitry. This cir-
cuitry is needed to compensate for the parabolic behav-
ior of the oscillators over temperature. The counter is
then clocked again until it reaches zero. If the gate
period is still not finished, then this process repeats.
The slope accumulator is used to compensate for the
nonlinear behavior of the oscillators over temperature,
yielding a high resolution temperature measurement.
This is done by changing the number of counts neces-
sary for the counter to go through for each incremental
degree in temperature. To obtain the desired resolution,
therefore, both the value of the counter and the number
of counts per degree C (the value of the slope accumu-
lator) at a given temperature must be known.
DS1720 FUNCTIONAL BLOCK DIAGRAM
RST
ADDRESS
AND
RESET
CLK
DQ
STCONTROL LOGIC
TEMPERATURE SENSOR
HIGH TEMP TRIGGER, TH
LOW TEMP TRIGGER, TL
DIGITAL COMPARATOR/LOGIC
T
HIGH
T
LOW
T
COM
相關PDF資料 |
PDF描述 |
|---|---|
| DS1721S | Digital Thermometer |
| DS1721U | Digital Thermometer |
| DS1721 | 2-Wire Digital Thermometer and Thermostat |
| DS1722S | IC-SM-DIGITAL THERMOMETER |
| DS1722 | Digital Thermometer with SPI/3-Wire Interface |
相關代理商/技術參數(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 關閉: 安裝風格: 封裝 / 箱體: 設備功能: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 關閉: 安裝風格: 封裝 / 箱體: 設備功能: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 關閉: 安裝風格: 封裝 / 箱體: 設備功能: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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。