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參數(shù)資料
| 型號： | AD7414ARM-3REEL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 2Cel, SQUARE, SURFACE MOUNT |
| 封裝： | MICRO, SOIC-8 |
| 文件頁數(shù)： | 2/12頁 |
| 文件大?。?/td> | 182K |
| 代理商： | AD7414ARM-3REEL7 |
AD7414
–10–
REV. PrB
Preliminary Technical Data
PRELIMINAR
Y
TECHNICAL
DA
TA
to the Address Pointer Register again. If you want to read
from another register then you will have to write to the
Address Pointer Register again to set up the relevent regis-
ter address.
Reading data from the Temperature Value Register is a
two byte operation as shown in Figure 8. The same rules
apply for a two byte read as a single byte read.
SMBUS ALERT
The ALERT output is an SMBus interrupt line for de-
vices that want to trade their ability to master for an extra
pin. The AD7414 is a slave only device and uses the
SMBUS ALERT to signal the host device that it wants to
talk. The SMBUS ALERT on the AD7414 is used as an
over temperature indicator.
The ALERT pin has an open-drain configuration which
allows the ALERT outputs of several AD7414’s to be
wired-AND together when the ALERT pin is active low.
Use D4 of the Configuration Register to set the active
polarity of the ALERT output. The power-up default is
active low. The ALERT function can be disabled or en-
abled by setting D5 of the Configuration Register to 1 or
0 respectively.
The host device can process the ALERT interrupt and
simultaneously access all SMBUS ALERT devices
through the alert response address. Only the device which
pulled the ALERT low will acknowledge the ARA (Alert
Response Address). If more than one device pulls the
ALERT pin low, the highest priority (lowest address)
device will win communication rights via standard I
2C
arbitration during the slave address transfer.
The ALERT output becomes active when the value in the
Temperature Value Register exceeds the value in the
THIGH Register. It is reset when the temperature falls below
the value stored in the TLOW Register.
The ALERT output requires an external pull-up resistor.
This can be connected to a voltage different from VDD
provided the maximum voltage rating of the ALERT out-
put pin is not exceeded. The value of the pull-up resistor
depends on the application, but should be as large as pos-
sible to avoid excessive sink currents at the ALERT out-
put, which can heat the chip and affect the temperature
reading.
POWER-ON DEFAULTS
The AD7414 always powers up with the following de-
faults........
Address Pointer Register pointing to the Temperature
Value Register.
THIGH Register loaded with 7F Hex.
TLOW Register loaded with 80 Hex.
Configuration Register loaded with 40 Hex.
OPERATING MODES
Mode 1
This is the power-on default mode of the AD7414. In this
mode the AD7414 does a temperature conversion every
400 s and then partially powers down until the next con-
version occurs.
If a read occurs during a conversion, the conversion aborts
and a new one starts after the read operation has finished.
The temperature value that is read is that of the previous
completed conversion. The next conversion will typically
occur 400 s after the new conversion has begun.
If a read is performed between conversions, a conversion
is initiated right after the read operation. After this con-
version, the part returns to performing a conversion every
400 s.
Mode 2
The only other mode the AD7414 operates in is the full
power-down mode. This mode is usually used when tem-
perature measurements are required at a very slow rate.
The power consumption of the part can be greatly reduced
in this mode by writing to the part to go to a full power-
down. Full power-down is initiated right after D7 of the
Configuration Register set to a 1.
When a temperature measurement is required, a write
operation can be performed to power-up the part. The
part then performs a conversion and is returned to full
power-down. The temperature value can be read in the
full power-down mode as the serial interface is still pow-
ered up.
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相關代理商/技術參數(shù) |
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| AD7414ARMZ-0 | 功能描述:IC SENSOR TEMP 10BIT DGTL 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標準包裝:3,000 系列:- 功能:溫度開關 傳感器類型:內(nèi)部 感應溫度:85°C 分界點 精確度:±6°C（最小值） 拓撲:ADC（三角積分型），比較器，寄存器庫 輸出類型:開路漏極 輸出警報:是 輸出風扇:是 電源電壓:2.7 V ~ 5.5 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應商設備封裝:SOT-23-5 包裝:帶卷 (TR) 其它名稱:ADT6501SRJZP085RL7-ND |
| AD7414ARMZ-0 | 制造商:Analog Devices 功能描述:SENSOR, TEMPERATURE, 0.5DEG CELSIUS, MSO |
| AD7414ARMZ-0REEL | 功能描述:IC SENSOR TEMP 10BIT DGTL 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標準包裝:2,500 系列:SilentSense™ 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應溫度:-55°C ~ 125°C，外部傳感器 精確度:±2°C 本地（最大），±3°C 遠程（最大） 拓撲:ADC（三角積分型），比較器，寄存器庫 輸出類型:I²C?/SMBus? 輸出警報:是 輸出風扇:是 電源電壓:2.7 V ~ 5.5 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:8-MSOP 包裝:帶卷 (TR) 其它名稱:MIC284-2BMMTRMIC284-2BMMTR-ND |
| AD7414ARMZ-0REEL7 | 功能描述:IC SENSOR TEMP 10BIT DGTL 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標準包裝:2,500 系列:SilentSense™ 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應溫度:-55°C ~ 125°C，外部傳感器 精確度:±2°C 本地（最大），±3°C 遠程（最大） 拓撲:ADC（三角積分型），比較器，寄存器庫 輸出類型:I²C?/SMBus? 輸出警報:是 輸出風扇:是 電源電壓:2.7 V ~ 5.5 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:8-MSOP 包裝:帶卷 (TR) 其它名稱:MIC284-2BMMTRMIC284-2BMMTR-ND |
| AD7414ARMZ-1 | 制造商:Analog Devices 功能描述:Temp Sensor Digital Serial (2-Wire) 8-Pin MSOP |
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