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參數(shù)資料
| 型號(hào)： | AD7818 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | 10-Bit ADCs with On-Chip Temperature Sensor(單通道,10位A/D轉(zhuǎn)換器) |
| 中文描述： | 10位ADC的片上溫度傳感器（單通道，10位的A / D轉(zhuǎn)換器） |
| 文件頁(yè)數(shù)： | 14/16頁(yè) |
| 文件大?。?/td> | 230K |
| 代理商： | AD7818 |
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AD7816/AD7817/AD7818
–14–
REV. 0
THROUGHPUT – kHz
10
1
0.010
80
10
P
0.1
20
30
40
50
60
70
Figure 19. Power vs. Throughput Rate
AD7817 SERIAL INTERFACE
The serial interface on the AD7817 is a five-wire interface with
read and write capabilities, with data being read from the output
register via the D
OUT
line and data being written to the control
register via the D
IN
line. The part operates in a slave mode and
requires an externally applied serial clock to the SCLK input to
access data from the data register or write to the control byte.
The RD/
WR
line is used to determine whether data is being
written to or read from the AD7817. When data is being written
to the AD7817, the RD/
WR
line is set logic low and when data
is being read from the part the line is set logic high—see Figure
20. The serial interface on the AD7817 is designed to allow the
part to be interfaced to systems that provide a serial clock that is
synchronized to the serial data, such as the 80C51, 87C51,
68HC11, 68HC05 and PIC16Cxx microcontrollers.
DB0 – DB7
DB0 – DB7(DB9)
D
OUT
CONVST
SCLK
BUSY
CS
RD/
WR
D
IN
OTI
t
15
t
16
t
3
t
POWER-UP
t
1
Figure 17. Mode 2 Operation
POWER VS. THROUGHPUT
Superior power performance can be achieved by using the Auto-
matic Power-Down (Mode 2) at the end of a conversion—see
Operating Modes section of the data sheet.
t
POWER-UP
t
CONVERT
2
m
s
CONVST
BUSY
8
m
s
t
CYCLE
100ms @ 10kSPS
Figure 18. Automatic Power-Down
Figure 18 shows how the Automatic Power-Down is imple-
mented to achieve the optimum power performance from the
AD7816, AD7817 and AD7818. The devices are operated in
Mode 2 and the duration of
CONVST
pulse is set to be equal to
the power-up time (2
μ
s). As the throughput rate of the device is
reduced the device remains in its power-down state longer, and
the average power consumption over time drops accordingly.
For example, if the AD7817 is operated in a continuous sam-
pling mode with a throughput rate of 10 kSPS, the power con-
sumption is calculated as follows. The power dissipation during
normal operation is 6 mW, V
DD
= 3 V. If the power up time is
2
μ
s and the conversion time is 9
μ
s, the AD7817 can be said to
dissipate 6 mW typically for 11
μ
s (worst case) during each
conversion cycle. If the throughput rate is 10 kSPS, the cycle
time is 100
μ
s and the power dissipated during each cycle is
(11/100)
×
(6 mW) = 600
μ
W typ.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7818AR | 制造商:Analog Devices 功能描述:ADC Single SAR 100ksps 10-bit Serial 8-Pin SOIC N 制造商:Rochester Electronics LLC 功能描述:1 CH. ADC W/0N-CHIP TEMP SENSOR I.C. - Bulk 制造商:Analog Devices 功能描述:SEMICONDUCTOR ((NW)) |
| AD7818ARM | 功能描述:IC ADC 10BIT W/TEMP SNSR 8-MSOP RoHS:否 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(kù) 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 |
| AD7818ARM-REEL | 功能描述:IC ADC 10BIT W/TEMP SNSR 8-MSOP RoHS:否 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(kù) 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 |
| AD7818ARM-REEL7 | 制造商:Analog Devices 功能描述:ADC Single SAR 100ksps 10-bit Serial 8-Pin MSOP T/R 制造商:Analog Devices 功能描述:ADC SGL SAR 100KSPS 10-BIT SERL 8MSOP - Tape and Reel |
| AD7818ARMZ | 功能描述:IC ADC 10BIT W/TEMP SENSOR 8MSOP 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(kāi)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(kù) 輸出類型:開(kāi)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 |
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