參數(shù)資料
型號(hào)： ADT7470ARQZ
廠(chǎng)商： ANALOG DEVICES INC
元件分類(lèi)： 溫度/濕度傳感器
英文描述： DIGITAL TEMP SENSOR-SERIAL, 7BIT(s), RECTANGULAR, SURFACE MOUNT
封裝： ROHS COMPLIANT, MO-137AB, QSOP-16
文件頁(yè)數(shù)： 38/40頁(yè)
文件大?。?/td> 962K
代理商： ADT7470ARQZ
ADT7470
Rev. C | Page 7 of
40
FUNCTIONAL DESCRIPTION
GENERAL DESCRIPTION
The ADT7470 is a multichannel, pulse-width modulation
(PWM) fan controller and monitor for any system requiring
monitoring and cooling. The device communicates with the
system via a serial system management bus. The device has
a single address line for address selection (Pin 11), a serial
data line for reading and writing addresses and data (Pin 16),
and an input line for the serial clock (Pin 1). All control and
programming functions of the ADT7470 are performed over
the serial bus, which supports both SMBus and fast I2C speci-
fications. In addition, an SMBALERT interrupt output is
provided to indicate out-of-limit conditions.
When the ADT7470 monitoring sequence is started, it cycles
through each fan tach input to measure fan speed. Measured
values from these inputs are stored in value registers. These
can be read out over the serial bus, or they can be automatically
compared with programmed limits stored in the limit registers.
The results of out-of-limit comparisons are stored in the status
registers, which can be read over the serial bus to flag out-of-
limit conditions. If fan speeds drop below preset levels or a
fan stalls, an interrupt is generated. Likewise, the ADT7470
can flag fan over speed conditions by using limits set in the
fan tach maximum registers.
ADT7470 Monitoring Cycle
The monitoring cycle begins when a 1 is written to the start
bit (Bit 0) of Configuration Register 1 (Register 0x40). Each
fan tach input is monitored in turn, and, as each measurement
is completed, the result is automatically stored in the appropri-
ate value register. Multiple temperature channels can also be
monitored by clocking in temperatures using the TMP_IN
pin. The temperature measurement function is addressed
in hardware and requires no software intervention. The
monitoring cycle continues unless disabled by writing a 0
to Bit 7 of Configuration Register 1.
The rate of temperature measurement updates depends on
the nominal conversion rate of the TMP05/TMP06 temperature
sensor (approximately 120 ms) and on the number of TMP05s
daisy-chained together. The total monitoring cycle time is the
temperature conversion time multiplied by the number of
temperature channels being monitored.
Fan tach measurements are taken in parallel and are not syn-
chronized with the temperature measurements in any way
CONFIGURATION REGISTER 1 (ADDRESS 0X40)
This register contains the STRT bit, Bit 0, which begins the
monitoring cycle on the ADT7470.
The SMBus timeout can be disabled , fast tach enabled, and
the registers locked, by writing to this register.
Control of high or low frequency fan drive, and the config-
uration for Pin 13, can be accessed via this register.
See Table 31 for more details.
CONFIGURATION REGISTER 2 (ADDRESS 0X74)
Writing a 1 to Bit 0 in this register puts the ADT7470 in
shutdown mode, which puts the part into a low current
consumption mode.
The PWM frequency for each fan is controlled via this register.
Fan speed measurement can be disabled for each fan by writing
to this register.
See Table 44 for more details.
ID REGISTERS
The ADT7470 has three read-only registers for identifying
the part and silicon revision.
The device ID register is located at address 0x3D, and is set
to 0x70.
The company ID register, located at address 0x3E, is set to 0x41.
The revision number register is at address 0x3F, and contains
the revision number of the ADT7470 silicon.
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參數(shù)描述
ADT7470ARQZ-REEL 功能描述:IC SENSOR TEMP FAN CTRLR 16QSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:SilentSense™ 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類(lèi)型:內(nèi)部和外部 感應(yīng)溫度:-55°C ~ 125°C，外部傳感器 精確度:±2°C 本地（最大），±3°C 遠(yuǎn)程（最大） 拓?fù)?ADC（三角積分型），比較器，寄存器庫(kù) 輸出類(lèi)型:I²C?/SMBus? 輸出警報(bào):是 輸出風(fēng)扇:是 電源電壓:2.7 V ~ 5.5 V 工作溫度:-55°C ~ 125°C 安裝類(lèi)型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-MSOP 包裝:帶卷 (TR) 其它名稱(chēng):MIC284-2BMMTRMIC284-2BMMTR-ND
ADT7470ARQZ-REEL7 功能描述:IC SENSOR TEMP FAN CTRLR 16QSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:SilentSense™ 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類(lèi)型:內(nèi)部和外部 感應(yīng)溫度:-55°C ~ 125°C，外部傳感器 精確度:±2°C 本地（最大），±3°C 遠(yuǎn)程（最大） 拓?fù)?ADC（三角積分型），比較器，寄存器庫(kù) 輸出類(lèi)型:I²C?/SMBus? 輸出警報(bào):是 輸出風(fēng)扇:是 電源電壓:2.7 V ~ 5.5 V 工作溫度:-55°C ~ 125°C 安裝類(lèi)型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-MSOP 包裝:帶卷 (TR) 其它名稱(chēng):MIC284-2BMMTRMIC284-2BMMTR-ND
ADT7473 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:dbCOOL Remote Thermal Monitor and Fan Control
ADT7473_11 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:dbCOOL Remote Thermal Monitor and Fan Control
ADT7473ARQZ 功能描述:板上安裝溫度傳感器 THERMAL MONITOR FAN CONTROLLER RoHS:否 制造商:Omron Electronics 輸出類(lèi)型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線(xiàn)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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