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參數(shù)資料
| 型號： | ADT7473ARQZ-1REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 2.50Cel, RECTANGULAR, SURFACE MOUNT |
| 封裝： | ROHS COMPLIANT, MO-137AB, QSOP-16 |
| 文件頁數(shù)： | 13/72頁 |
| 文件大?。?/td> | 1494K |
| 代理商： | ADT7473ARQZ-1REEL |
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ADT7473/ADT7473-1
Rev. C | Page 20 of 72
LIMITS, STATUS REGISTERS, AND INTERRUPTS
LIMIT VALUES
Associated with each measurement channel on the ADT7473/
ADT7473-1 are high and low limits. These can form the basis of
system status monitoring; a status bit can be set for any out-of-
limit condition and is detected by polling the device. Alternatively,
SMBALERT interrupts can be generated to flag a processor or
microcontroller of out-of-limit conditions.
8-Bit Limits
The following is a list of 8-bit limits on the ADT7473/ADT7473-1.
Voltage Limit Registers
Register 0x46, VCCP Low Limit = 0x00 default
Register 0x47, VCCP High Limit = 0xFF default
Register 0x48, VCC Low Limit = 0x00 default
Register 0x49, VCC High Limit = 0xFF default
Temperature Limit Registers
Register 0x4E, Remote 1 Temperature Low Limit = 0x01 default
Register 0x4F, Remote 1 Temperature High Limit = 0xFF default
Register 0x6A, Remote 1 THERM Limit = 0xA4 default
Register 0x50, Local Temperature Low Limit = 0x01 default
Register 0x51, Local Temperature High Limit = 0xFF default
Register 0x6B, Local THERM Temperature Limit = 0xA4 default
Register 0x52, Remote 2 Temperature Low Limit = 0x01 default
Register 0x53, Remote 2 Temperature High Limit = 0xFF default
Register 0x6C, Remote 2 THERM Temperature Limit = 0xA4
default
THERM Limit Register
Register 0x7A, THERM Timer Limit = 0x00 default
16-Bit Limits
The fan TACH measurements are 16-bit results. The fan TACH
limits are also 16 bits, consisting of a high byte and low byte.
Because fans running under speed or stalled are normally the
only conditions of interest, only high limits exist for fan TACHs.
Because the fan TACH period is actually being measured,
exceeding the limit indicates a slow or stalled fan.
Fan Limit Registers
Register 0x54, TACH1 Minimum Low Byte = 0xFF default
Register 0x55, TACH1 Minimum High Byte = 0xFF default
Register 0x56, TACH2 Minimum Low Byte = 0xFF default
Register 0x57, TACH2 Minimum High Byte = 0xFF default
Register 0x58, TACH3 Minimum Low Byte = 0xFF default
Register 0x59, TACH3 Minimum High Byte = 0xFF default
Register 0x5A, TACH4 Minimum Low Byte = 0xFF default
Register 0x5B, TACH4 Minimum High Byte = 0xFF default
Out-of-Limit Comparisons
Once all limits have been programmed, the ADT7473/
ADT7473-1 can be enabled for monitoring. The ADT7473/
ADT7473-1 measures all voltage and temperature measure-
ments in round-robin format and sets the appropriate status bit
for out-of-limit conditions. TACH measurements are not part
of this round-robin cycle. Comparisons are done differently
depending on whether the measured value is being compared
to a high or low limit.
High limit > comparison performed
Low limit ≤ comparison performed
Voltage and temperature channels use a window comparator for
error detecting and, therefore, have high and low limits. Fan
speed measurements use only a low limit. This fan limit is
needed only in manual fan control mode.
Analog Monitoring Cycle Time
The analog monitoring cycle begins when a 1 is written to the
start bit (Bit 0) of Configuration Register 1 (0x40). By default,
the ADT7473/ADT7473-1 powers up with this bit set. The
ADC measures each analog input in turn and, as each measure-
ment is completed, the result is automatically stored in the
appropriate value register. This round-robin monitoring cycle
continues unless disabled by writing a 0 to Bit 0 of Configuration
Register 1.
As the ADC is normally left to free-run in this manner, the time
taken to monitor all the analog inputs is normally not of
interest, because the most recently measured value of any input
can be read out at any time.
For applications where the monitoring cycle time is important,
it can easily be calculated. The total number of channels
measured is
One dedicated supply voltage input (VCCP)
Supply voltage (VCC pin)
Local temperature
Two remote temperatures
As mentioned previously, the ADC performs round-robin
conversions. The total monitoring cycle time for averaged voltage
and temperature monitoring is 146 ms. The total monitoring cycle
time for voltage and temperature monitoring with averaging
disabled is 19 ms. The ADT7473/ADT7473-1 is a derivative of the
ADT7467. As a result, the total conversion time in the ADT7473/
ADT7473-1 is the same as the total conversion time of the
ADT7467, even though the ADT7473/ADT7473-1 has fewer
monitored channels.
Fan TACH measurements are made in parallel and are not
synchronized with the analog measurements in any way.
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相關(guān)代理商/技術(shù)參數(shù) |
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| ADT7473ARQZ-1REEL7 | 功能描述:IC THERM MON FAN CTRLR 16-QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:dBCool® 標(biāo)準(zhǔn)包裝:1 系列:- 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應(yīng)溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠(yuǎn)程（最大值） 拓?fù)?ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風(fēng)扇:無 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 供應(yīng)商設(shè)備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
| ADT7473ARQZ-1RL | 功能描述:板上安裝溫度傳感器 FAN CNTRLR/INT MON 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 |
| ADT7473ARQZ-REEL | 功能描述:板上安裝溫度傳感器 FAN CNTRLR/INT MON 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 |
| ADT7473ARQZ-REEL7 | 功能描述:IC REMOTE THERMAL CTRLR 16QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:dBCool® 標(biāo)準(zhǔn)包裝:1 系列:- 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應(yīng)溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠(yuǎn)程（最大值） 拓?fù)?ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風(fēng)扇:無 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 供應(yīng)商設(shè)備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
| ADT7473ARQZ-RL7 | 功能描述:板上安裝溫度傳感器 FAN CNTRLR/INT MON 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 |
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