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參數(shù)資料
| 型號(hào)： | AD7314ARM |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | Low-Voltage, 10-Bit Digital Temperature Sensor in 8-Lead uSOIC |
| 中文描述： | DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 2Cel, SQUARE, SURFACE MOUNT |
| 封裝： | MO-187AA, MSOP-8 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 97K |
| 代理商： | AD7314ARM |
REV. 0
AD7314
–6–
Write Operation
Figure 3 also shows the interface diagram for a serial write to
the AD7314. The write operation takes place at the same time
as the read operation. Data is clocked into the Control Register
on the falling edge of SCLK. Only the third bit in the data stream
provides a user-controlled function. This third bit is the power-
down bit which, when set to a 1, puts the AD7314 into shutdown
mode. The first two bits of the data stream are don’t cares while
all other bits in the data stream other, than the power-down bit,
should be 0 to ensure correct operation of the AD7314. Data is
loaded into the Control Register on the fifteenth rising SCLK
edge. The data takes effect at this time i.e., if the part is pro-
grammed to go into shutdown, it does so at this point. If the CE
is brought low before this fifteenth SCLK edge, the Control
Register will not be loaded and the power-down status of the
part will not change.
MICROCONTROLLER INTERFACING
The AD7314 serial interface allows for easy interface to most
microcontrollers and microprocessors. A typical interface circuit
is shown in Figure 4.
AD7314
*
SCLK
SDI
SDO
CE
SCLK
DOUT
DIN
CE
Controller
*
*
ADDITIONAL PINS OMITTED FOR CLARITY
Figure 4. Typical Interface
The ID pin of the AD7314 can be used to distinguish the device
if used as a drop-in replacement temperature sensor. Connected
to Pin 7 (ID pin) is a 1 k
internal pull-down resistor. If a pull-
up resistor is used on Pin 7 to aid in identifying a device then we
recommend a pull-up value of 100 k
with V
DD
at 2.9 V nominal.
Figure 5 shows the recommended pull-up resistor value for the
ID pin. The recommended resistor value in Figure 5 minimizes
the additional power the AD7314 has to dissipate, thus reducing
any negative affects on the temperature sensor measurements.
AD7314
*
Controller
*
*
ADDITIONAL PINS OMITTED FOR CLARITY
ID
2.9V
100k
1k
Figure 5. Typical ID Pin Interface
MOUNTING THE AD7314
The AD7314 can be used for surface or air-temperature sensing
applications. If the device is cemented to a surface with thermally
conductive adhesive, the die temperature will be within about
0.1
°
C of the surface temperature, thanks to the devices low
power consumption. Care should be taken to insulate the back
and leads of the device from the air, if the ambient air tempera-
ture is different from the surface temperature being measured.
The ground pin provides the best thermal path to the die, so the
temperature of the die will be close to that of the printed circuit
ground track. Care should be taken to ensure that this is in good
thermal contact with the surface being measured.
As with any IC, the AD7314 and its associated wiring and cir-
cuits must be kept free from moisture to prevent leakage and
corrosion, particularly in cold conditions where condensation is
more likely to occur. Water-resistant varnishes and conformal
coatings can be used for protection. The small size of the AD7314
package allows it to be mounted inside sealed metal probes,
which provide a safe environment for the device.
CE
SCLK
SDO
SDI
DON'T
CARE
DON'T
CARE
POWER-
DOWN
LEADING
ZERO
DB9
DB8
DB0
1
2
3
4
12
15
16
11
t
4
t
6
DATA-IN IS LOADED INTO
CONTROL REGISTER
ON THIS EDGE
Figure 3. Serial Interface Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7314ARM-REEL | 制造商:Analog Devices 功能描述:Temp Sensor Digital Serial (4-Wire, SPI) 8-Pin MSOP T/R 制造商:Rochester Electronics LLC 功能描述:10BIT DIGITAL TEMP SENSOR (8LD USOIC)IC - Tape and Reel |
| AD7314ARM-REEL7 | 制造商:Analog Devices 功能描述:Temp Sensor Digital Serial (4-Wire, SPI) 8-Pin MSOP T/R 制造商:Rochester Electronics LLC 功能描述:10BIT DIGITAL TEMP SENSOR (8LD USOIC)IC - Tape and Reel |
| AD7314ARMZ | 功能描述:IC SENSOR TEMP 10BIT DGTL 8-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 功能:溫度開關(guān) 傳感器類型:內(nèi)部 感應(yīng)溫度:85°C 分界點(diǎn) 精確度:±6°C（最小值） 拓?fù)?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(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 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:帶卷 (TR) 其它名稱:ADT6501SRJZP085RL7-ND |
| AD7314ARMZ-REEL | 制造商:Analog Devices 功能描述:Temp Sensor Digital Serial (4-Wire, SPI) 8-Pin MSOP T/R |
| AD7314ARMZ-REEL7 | 功能描述:IC SENSOR TEMP 10BIT DGTL 8-MSOP RoHS:是 類別: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 輸出類型: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:MIC284-2BMMTRMIC284-2BMMTR-ND |
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