參數(shù)資料
型號(hào)： AT30TS750-MA8-T
廠商： ATMEL CORP
元件分類： 溫度/濕度傳感器
英文描述： DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT
封裝： 2 X 3 MM, 0.60 MM HEIGHT, GREEN, PLASTIC, MO-229, UDFN-8
文件頁(yè)數(shù)： 52/52頁(yè)
文件大?。?/td> 1369K
代理商： AT30TS750-MA8-T
Atmel AT30TS750 [Preliminary]
5.1
Temperature Measurements
The AT30TS750 utilizes a band-gap type temperature sensor with an internal sigma-delta analog-
to-digital converter (ADC) to measure and convert the temperature reading into a digital value
with a selectable resolution as high as 0.0625°C. The measured temperature is calibrated in
degrees Celsius; therefore, a lookup table or conversion routine is necessary for applications that
wish to deal in degrees Fahrenheit.
The result of the digitized temperature measurements are stored in the AT30TS750’s internal
Temperature Register, which is readable at any time through the device’s serial interface. When
in the normal operating mode, the device performs continuous temperature measurements and
updates the contents of the Temperature Register (see the Temperature Register section on
page 16) after each analog-to-digital conversion.
The resolution of the temperature measurement data can be configured to 9, 10, 11, or 12 bits
which corresponds to temperature increments of 0.5°C, 0.25°C, 0.125°C, and 0.0625°C,
respectively. Selecting the temperature resolution is done by setting the R1 and R0 bits in the
Configuration Register (see the Configuration Register section on page 19). The ADC conversion
time does increase with each bit of higher resolution, so careful consideration should be given to
the resolution versus conversion time relationship. The resolution after device power-up or reset
will revert to what was previously selected using the NVR1 and NVR0 bits of the Nonvolatile
Configuration Register bits prior to when the device was powered-down or reset.
With 12 bits of resolution, the AT30TS750 can theoretically measure a temperature range of
255°C (-128°C to +127°C); however, the device is only designed to measure temperatures over a
range of -55°C to +125°C.
5.2
Temperature Alarm
After the measured temperature value has been stored into the Temperature Register, the data
will be compared with both the high and low temperature limits defined by the values stored in the
THIGH Limit Register and TLOW Limit Register. If the comparison results in a valid fault condition
(see Fault Tolerance Limits section on page 9), then the device will activate the ALERT output pin.
The polarity and function of the ALERT pin can be configured by using specific bits in the
Configuration Register.
The polarity of the ALERT pin is controlled by the POL bit in the
Configuration Register while the function of the ALERT pin changes based on the Alarm
Thermostat Mode, which can be configured to either Comparator Mode (see Comparator Mode
section on page 10) or Interrupt Mode (see Interrupt Mode section on page 11) by using the
CMP/INT bit in the Configuration Register. After the device powers up or resets, the NVPOL and
NVCMP/INT bits of the Nonvolatile Configuration Register are automatically copied into the POL
and CMP/INT bits of the Configuration Register; therefore, the ALERT pin polarity and function
will revert back to the settings defined by the NVPOL and NVCMP/INT bits prior to when the
device was powered-down or reset.
The value of the high temperature limit stored in the THIGH Limit Register must be greater than
the value of the low temperature limit stored in the TLOW Limit Register in order for the ALERT
function to work properly; otherwise, the ALERT pin will output erroneous results and will falsely
signal temperature alarms.
5.2.1
Fault Tolerance Limits
A temperature fault occurs if the measured temperature meets or exceeds either the high
temperature limit set by the THIGH Limit Register or the low temperature limit set by the TLOW
Limit Register. To prevent false alarms due to environmental or temperature noise, the device
8749A-DTS-03/11
9
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT30TS750SS8B 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:9- to 12-bit Selectable, ?±0.5?°C Accurate Digital Temperature Sensor with Nonvolatile Registers
AT30TS750-SS8-B 功能描述:板上安裝溫度傳感器 TMP SENSOR 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
AT30TS750SS8T 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:9- to 12-bit Selectable, ?±0.5?°C Accurate Digital Temperature Sensor with Nonvolatile Registers
AT30TS750-SS8-T 功能描述:板上安裝溫度傳感器 TMP SENSOR 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
AT30TS750XM8B 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:9- to 12-bit Selectable, ?±0.5?°C Accurate Digital Temperature Sensor with Nonvolatile Registers
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