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| 型號： | EVAL-AD7150EBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 5/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL FOR AD7150 |
| 特色產(chǎn)品： | AD715x Series Capacitance-to-Digital Converters & Evaluation Board |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 傳感器類型： | 觸摸，電容式 |
| 接口： | I²C |
| 電源電壓： | 2.7 V ~ 3.6 V |
| 嵌入式： | 否 |
| 已供物品： | 板，電池 |
| 已用 IC / 零件： | AD7150 |
| 產(chǎn)品目錄頁面： | 781 (CN2011-ZH PDF) |
| 相關(guān)產(chǎn)品： | AD7150BRMZ-REEL-ND - IC CAP CONV 2CH ULT LP 10MSOP AD7150BRMZ-ND - IC CAP CONV 2CH ULT LP 10MSOP |
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AD7150
Rev. 0 | Page 13 of 28
AUTOCAPDAC ADJUSTMENT
In adaptive threshold mode, the part can dynamically adjust the
CAPDAC to keep the CDC in an optimal operating capacitive
range. When the AutoDAC function is enabled, the CAPDAC
value is automatically incremented when the data average
exceeds three-fourths of the CDC full range, and the CAPDAC
value is decremented when the data average goes below one-
fourth of the CDC full range. The AutoDAC increment or
decrement step depends on the selected CDC capacitive input
range. See the Setup Registers section.
POWER-DOWN TIMER
In power sensitive applications, the AD7150 can be set to
automatically enter power-down mode after a programmed
period of time in which the outputs have not been activated.
The AD7150 can be then returned to a normal operational
mode either via the serial interface or by the power supply
off/on sequence.
POWER SUPPLY MONITOR
When the AD7150 VDD power supply voltage drops below a
defined level needed for correct CDC operation, the on-chip
power supply monitor stops the adaptive threshold logic and
holds it in reset. After the VDD reaches the required level, the
threshold logic is released, and the data average is reset to the
value of the first conversion finished at the correct power supply
voltage.
This feature prevents the adaptive threshold from being set
incorrectly after a very slow rise of the VDD voltage or from
being corrupted by accidental drops in the VDD voltage.
The other AD7150 functions continue working below the
power supply monitor threshold, down to approximately
1.0V..1.8V, the exact level depending on the manufacturing
process variation. In the region of the low VDD voltage, the part is
still accessible via the serial interface and continues conversion.
However, the conversion results may be incorrect and,
therefore, the data should not be considered valid if the part
operates below the power supply monitor threshold.
The status of the power supply monitor can be determined by
reading the PwrDown bit in the AD7150 status register.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EVAL-AD7150EBZ | 制造商:Analog Devices 功能描述:PROXIMITY SENSOR EVAL BOARD |
| EVAL-AD7152EBZ | 功能描述:BOARD EVAL AD7152 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 傳感器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- |
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| EVAL-AD7156EBZ | 制造商:Analog Devices 功能描述:EVAL BOARD, AD7156 2CH CAPACITANCE CONVE |
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