- 您現在的位置：買賣IC網 > PDF目錄67357 > ADM1031ARQZ-R7 (ON SEMICONDUCTOR) DIGITAL TEMP SENSOR-SERIAL, 11BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT PDF資料下載
參數資料
| 型號： | ADM1031ARQZ-R7 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 11BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT |
| 封裝： | LEAD FREE, QSOP-16 |
| 文件頁數： | 4/30頁 |
| 文件大?。?/td> | 299K |
| 代理商： | ADM1031ARQZ-R7 |
第1頁第2頁第3頁當前第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁
ADM1031
http://onsemi.com
12
speed. Bit 1 (Fan Fault) is set whenever a fan tach failure is
detected. Once cleared, it reasserts on subsequent fan tach
failures.
Bit 2 and Bit 3 of Status Register 1 and Status Register 2
are the Remote 1 and Remote 2 Temperature High and Low
status bits. Exceeding the high or low temperature limits for
the external channel sets these status bits. Reading the status
register clears these bits. However, these bits are reasserted
if the outoflimit condition still exists on the next
monitoring cycle. Bit 6 and Bit 7 are the Local Temperature
High and Low status bits. These behave exactly the same as
the Remote Temperature High and Low status bits. Bit 4 of
Status Register 1 indicates that the Remote Temperature
THERM limit has been exceeded. This bit gets cleared on a
read of Status Register 1 (see Figure 20). Bit 5 indicates a
remote diode error. This bit is a 1 if a short or open is detected
on the remote temperature channel on powerup. If this bit is
set to 1 on powerup, it cannot be cleared. Bit 6 of Status
Register 2 (0
×03) indicates that the Local THERM limit has
been exceeded. This bit is cleared on a read of Status
Register 2. Bit 7 indicates that THERM has been pulled low
as an input. This bit can also be cleared on a read of Status
Register 2.
Figure 20. Operation of THERM and INT Signals
5°
INT REARMED
STATUS REG. READ
TEMP
THERM LIMIT
THERM
INT
Figure 20 shows the interaction between INT and
THERM. Once a critical temperature THERM limit is
exceeded, both INT and THERM assert low. Reading the
status registers clears the interrupt and the INT pin goes
high. However, the THERM pin remains asserted until the
measured temperature falls 5
°C below the exceeded
THERM limit. This feature can be used to CPU throttle or
drive a fan full speed for maximum cooling. Note that the
INT pin for that interrupt source is not rearmed until the
temperature has fallen below the THERM limit –5
°C. This
prevents unnecessary interrupts from tying up valuable CPU
resources.
Fan Control Modes of Operation
The ADM1031 has four different modes of operation.
These modes determine the behavior of the system.
1. Automatic Fan Speed Control Mode.
2. Filtered Automatic Fan Speed Control Mode.
3. PWM Duty Cycle Select Mode (directly sets fan
speed under software control).
4. RPM Feedback Mode.
Automatic Fan Speed Control
The ADM1031 has a local temperature channel and two
remote temperature channels, which can be connected to an
onchip diodeconnected transistor on a CPU. These three
temperature channels can be used as the basis for an
automatic fan speed control loop to drive fans using pulse
width modulation (PWM).
How Does the Control Loop Work?
The automatic fan speed control loop is shown in Figure 21.
Figure 21. Automatic Fan Speed Control Loop
MAX
FAN
SPEED
MIN
TEMPERATURE
TMIN
TMAX = TMIN + TRANGE
SPINUP FOR SECONDS
TMIN is the temperature at which the fan should switch on
and run at minimum speed. The fan only turns on once the
temperature being measured rises above the TMIN value
programmed. The fan spins up for a predetermined time
(default = 2 seconds). See the Fan SpinUp section for more
details.
TRANGE is the temperature range over which the
ADM1031 automatically adjusts the fan speed. As the
temperature increases beyond TMIN, the PWM_OUT duty
cycle increases accordingly. The TRANGE parameter
actually defines the fan speed vs. temperature slope of the
control loop.
TMAX is the temperature at which the fan is at its
maximum speed. At this temperature, the PWM duty cycle
driving the fan is 100%. TMAX is given by TMIN + TRANGE.
Since this parameter is the sum of the TMIN and TRANGE
parameters, it does not need to be programmed into a register
onchip.
A hysteresis value of 5
°C is included in the control loop
to prevent the fan continuously switching on and off if the
temperature is close to TMIN. The fan continues to run until
the temperature drops 5
°C below TMIN.
Figure 22 shows the different control slopes determined
by the TRANGE value chosen, and programmed into the
ADM1031. TMIN is set to 0°C to start all slopes from the
same point. The figure shows how changing the TRANGE
value affects the PWM duty cycle vs. temperature slope.
相關PDF資料 |
PDF描述 |
|---|---|
| ADM1031ARQZ-REEL | DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT |
| ADM1031ARQZ-REEL7 | DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT |
| ADM1031ARQZ | DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT |
| ADM1031ARQ | DIGITAL TEMP SENSOR-SERIAL, 11BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT |
| ADRF6604ACPZ-R7 | 2500 MHz - 2900 MHz RF/MICROWAVE DOUBLE BALANCED MIXER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ADM1031ARQZ-REEL | 功能描述:板上安裝溫度傳感器 2 CH TDM PWM FAN CTRL IC 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 |
| ADM1031ARQZ-REEL7 | 功能描述:IC SENSOR 2TEMP/FAN CTRL 16QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標準包裝:1 系列:- 功能:溫度監(jiān)控系統（傳感器） 傳感器類型:內部和外部 感應溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠程（最大值） 拓撲:ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風扇: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 供應商設備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
| ADM1032 | 制造商:AD 制造商全稱:Analog Devices 功能描述:+-1C Remote and Local System Temperature Monitor |
| ADM1032_12 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:1C Remote and Local System Temperature Monitor Supports SMBus Alert |
| ADM1032AR | 功能描述:IC TEMP MONITOR 85DEG C 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標準包裝:1 系列:- 功能:溫度監(jiān)控系統（傳感器） 傳感器類型:內部和外部 感應溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠程（最大值） 拓撲:ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風扇: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 供應商設備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
發(fā)布緊急采購，3分鐘左右您將得到回復。