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參數(shù)資料
| 型號： | ADT7317ARQ |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; No. of Contacts:37; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:15-35 |
| 中文描述： | SPI/I2C兼容，10位數(shù)字溫度傳感器和四DAC的電壓輸出12/10/8-Bit |
| 文件頁數(shù)： | 17/32頁 |
| 文件大?。?/td> | 340K |
| 代理商： | ADT7317ARQ |
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ADT7316/7317/7318
–
17
–
REV. PrN
PRELIMINARY TECHNICAL DATA
LAYOUT CONSIDERATIONS
Digital boards can be electrically noisy environments, and
care must be taken to protect the analog inputs from
noise, particularly when measuring the very small voltages
from a remote diode sensor. The following precautions
should be taken:
1. Place the ADT7316/17/18 as close as possible to the
remote sensing diode. Provided that the worst noise
sources such as clock generators, data/address buses and
CRTs are avoided, this distance can be 4 to 8 inches.
2. Route the D+ and D- tracks close together, in parallel,
with grounded guard tracks on each side. Provide a
ground plane under the tracks if possible.
3. Use wide tracks to minimize inductance and reduce
noise pickup. 10 mil track minimum width and spacing
is recommended.
GND
D+
D-
GND
10 mil.
10 mil.
10 mil.
10 mil.
10 mil.
10 mil.
10 mil.
Figure 12. Arrangement of Signal Tracks
4. Try to minimize the number of copper/solder joints,
which can cause thermocouple effects. Where copper/
solder joints are used, make sure that they are in both
the D+ and D- path and at the same temperature.
Thermocouple effects should not be a major problem as
1
o
C corresponds to about 240μV, and thermocouple
voltages are about 3μV/
o
C of temperature difference.
Unless there are two thermocouples with a big tempera-
ture differential between them, thermocouple voltages
should be much less than 200mV.
5. Place 0.1μF bypass and 2200pF input filter capacitors
close to the ADT7316/17/18.
6. If the distance to the remote sensor is more than 8
inches, the use of twisted pair cable is recommended.
This will work up to about 6 to 12 feet.
7. For really long distances (up to 100 feet) use shielded
twisted pair such as Belden #8451 microphone cable.
Connect the twisted pair to D+ and D- and the shield
to GND close to the ADT7316/17/18. Leave the re-
mote end of the shield unconnected to avoid ground
loops.
Because the measurement technique uses switched current
sources, excessive cable and/or filter capacitance can affect
the measurement. When using long cables, the filter ca-
pacitor may be reduced or removed.
Cable resistance can also introduce errors. 1 series resis-
tance introduces about 0.5
o
C error.
TEMPERATURE VALUE FORMAT
One LSB of the ADC corresponds to 0.25
°
C. The ADC
can theoretically measure a temperature span of 255
°
C.
The internal temperature sensor is guaranteed to a low
value limit of -40
°
C. It is possible to measure the full
temperature span using the external temperature sensor.
The temperature data format is shown in Tables 3.
The result of the internal or external temperature mea-
surements is stored in the temperature value registers, and
is compared with limits programmed into the Internal or
External High and Low Registers.
TABLE 3. Temperature Data Format (Internal and Ex-
ternal Temperature)
Temperature
Digital Output
DB9..........DB0
-40
°
C
11 0110 0000
N x I
I
V
DD
I
BIAS
TO ADC
V
OUT+
V
OUT-
BIAS
DIODE
INTERNAL
SENSE
TRANSISTOR
Figure 11. Top Level Structure of Internal Temperature Sensor
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PDF描述 |
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| ADT7318 | Circular Connector; No. of Contacts:37; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:15-35 |
| ADT7318ARQ | Circular Connector; No. of Contacts:37; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:15-35 |
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| ADT7411ARQ-REEL | Circular Connector; No. of Contacts:26; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:17-26 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADT7317ARQ-REEL | 制造商:Analog Devices 功能描述:Digital Temperature Sensor 16-Pin QSOP T/R 制造商:Rochester Electronics LLC 功能描述:DTS, 10-BIT QUAD VOLTAGE OUTPUT DAC I.C. - Tape and Reel |
| ADT7317ARQ-REEL7 | 制造商:Analog Devices 功能描述:Digital Temperature Sensor 16-Pin QSOP T/R 制造商:Rochester Electronics LLC 功能描述:DTS, 10-BIT QUAD VOLTAGE OUTPUT DAC I.C. - Tape and Reel |
| ADT7317ARQZ | 功能描述:IC SENSOR TEMP QUAD DAC 16QSOP 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 |
| ADT7317ARQZ-REEL | 功能描述:IC SENSOR TEMP QUAD DAC 16QSOP 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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