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參數資料
| 型號： | ADT7411ARQ |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | SPI/I2C Compatible, 10-Bit Digital Temperature Sensor and 8-Channel ADC |
| 中文描述： | SPI/I2C兼容，10位數字溫度傳感器和8通道ADC |
| 文件頁數： | 14/36頁 |
| 文件大?。?/td> | 456K |
| 代理商： | ADT7411ARQ |
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ADT7411
FUNCTIONAL DESCRIPTION
ANALOG INPUTS
Single-Ended Inputs
The ADT7411 offers eight single-ended analog input channels.
The analog input range is from 0 V to 2.25 V or 0 V to V
DD
. To
maintain the linearity specification it is recommended that the
maximum V
DD
value be set at 5 V. Selection between the two
input ranges is done by Bit C4 of the Control Configuration
3 register (Address 1Ah). Setting this bit to 0 sets up the analog
input ADC reference to be sourced from the internal voltage
reference of 2.25 V. Setting the bit to 1 sets up the ADC
reference to be sourced from V
DD
.
Rev. A | Page 14 of 36
The ADC resolution is 10 bits and is mostly suitable for dc input
signals or very slowly varying ac signals. Bits C1:2 of the
Control Configuration 1 register (Address 18h) are used to set
up Pins 7 and 8 as AIN1 and AIN2. Figure 20 shows the overall
view of the 8-channel analog input path.
0
CONTROL
LOGIC
CAP DAC
ACQUISITION
PHASE
SAMPLING
CAPACITOR
COMPARATOR
INT V
REF
REF
V
DD
AIN
SW1
A
B
SW2
REF/2
Figure 20. Octal Analog Input Path
Converter Operation
The analog input channels use a successive approximation ADC
based around a capacitor DAC. Figure 21 and Figure 22 show
simplified schematics of the ADC. Figure 21 shows the ADC
during acquisition phase. SW2 is closed and SW1 is in position
A. The comparator is held in a balanced condition and the
sampling capacitor acquires the signal on AIN.
0
CONTROL
LOGIC
CAP DAC
ACQUISITION
PHASE
SAMPLING
CAPACITOR
COMPARATOR
INT V
REF
REF
V
DD
AIN
SW1
A
B
SW2
REF/2
Figure 21. ADC Acquisition Phase
When the ADC eventually goes into conversion phase (see
Figure 22) SW2 opens and SW1 moves to position B, causing
the comparator to become unbalanced. The control logic and
the DAC are used to add and subtract fixed amounts of charge
from the sampling capacitor to bring the comparator back into
a balanced condition. When the comparator is rebalanced, the
conversion is complete. The control logic generates the ADC
output code. Figure 24 shows the ADC transfer function for
single-ended analog inputs.
0
CONTROL
LOGIC
CAP DAC
CONVERSION
PHASE
SAMPLING
CAPACITOR
COMPARATOR
INT V
REF
REF
V
DD
AIN
SW1
A
B
SW2
REF/2
Figure 22. ADC Conversion Phase
0
C1
D–
D+
LOW-PASS
FILTER
f
C
= 65kHz
BIAS
DIODE
V
DD
TO ADC
V
OUT+
V
OUT–
REMOTE
SENSING
TRANSISTOR
(2N3906)
OPTIONAL CAPACITOR, UP TO
3nF MAX. CAN BE ADDED TO
NOISE REJECTION IN NOISY
ENVIRONMENTS
I
N
×
I
I
BIAS
Figure 23. Signal Conditioning for External Diode Temperature Sensor
相關PDF資料 |
PDF描述 |
|---|---|
| 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 |
| ADT7411ARQ-REEL7 | Circular Connector; No. of Contacts:55; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:17-35 |
| ADT7411ARQZ-REEL | Circular Connector; No. of Contacts:55; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:17-35 |
| ADT7411ARQZ-REEL7 | Circular Connector; No. of Contacts:55; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Socket; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:17-35 |
| ADT7411ARQZ10 | LJT 6C 6#12 SKT RECP |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ADT7411ARQ-REEL | 功能描述:IC SENSOR TEMP 10BIT ADC 16QSOP RoHS:否 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 |
| ADT7411ARQ-REEL7 | 功能描述:IC SENSOR TEMP 10BIT ADC 16QSOP RoHS:否 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 |
| ADT7411ARQZ | 功能描述:IC DGTL TEMP SNSR 8CH ADC 16QSOP 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 |
| ADT7411ARQZ | 制造商:Analog Devices 功能描述:Temperature Sensor IC |
| ADT7411ARQZ1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:SPI??-/I2C??-Compatible, 10-Bit Digital Temperature Sensor and 8-Channel ADC |
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