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| 型號： | AD7151BRMZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 4/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CAP CONV 1CH ULT LP 10MSOP |
| 特色產(chǎn)品： | AD715x Series Capacitance-to-Digital Converters & Evaluation Board |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 類型： | 電容數(shù)字轉(zhuǎn)換器 |
| 輸入類型： | 電壓 |
| 輸出類型： | 數(shù)字 |
| 接口： | 2 線串口 |
| 電流 - 電源： | 120µA |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-TFSOP，10-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 10-MSOP |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 781 (CN2011-ZH PDF) |
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AD7151
Rev. 0 | Page 12 of 28
SENSITIVITY
In adaptive threshold mode, the output comparator threshold is
set as a defined distance (sensitivity) above the data average,
below the data average, or both, depending on the selected
threshold mode of operation (see Figure 29). The sensitivity
value is programmable in the range 0 to 255 LSBs of the 12-bit
CDC converter (see the Register Descriptions section).
NEGATIVE
THRESHOLD
POSITIVE
THRESHOLD
DATA AVERAGE
OUTPUT ACTIVE
TIME
SENSITIVITY
DATA
SENSITIVITY
0
70
86
-0
19
Figure 29. Threshold Sensitivity
HYSTERESIS
In adaptive threshold mode, the comparator features hysteresis.
The hysteresis is fixed to one-fourth of the threshold sensitivity
and can be programmed on or off. The comparator does not
have hysteresis in the fixed threshold mode.
OUTPUT
POSITIVE
THRESHOLD
DATA AVERAGE
OUTPUT ACTIVE
TIME
HYSTERSIS
DATA
07
08
6-
02
0
Figure 30. Threshold Hysteresis
TIMEOUT
In the case of a large, long change in the capacitive input, when
the data average adapting to a new condition may take too long,
a timeout can be set.
The timeout becomes active (counting) when the CDC data
goes outside the band of data average ± sensitivity. When the
timeout elapses (a defined number of CDC conversions is
counted), the data average (and thus the threshold) is forced to
follow the new CDC data value immediately (see Figure 31).
The timeout can be set independently for approaching (for change
in data toward the threshold) and for receding (for change in data
Register Descriptions section.
DATA AVERAGE
+ SENSITIVITY
LARGE CHANGE IN DATA
DATA AVERAGE
– SENSITIVITY
TIME
TIMEOUT
07
08
6-
02
1
Figure 31. Threshold Timeout After a Large Change in CDC Data
INPUT CAPACITANCE
THRESHOLD
OUTPUT
DATA AVERAGE
OUTPUT ACTIVE
TIME
TIMEOUT APPROACHING
07
086
-02
2
Figure 32. Approaching Timeout in Negative Threshold Mode
Shortens False Output Trigger
INPUT
CAPACITANCE
LARGE CHANGE
THRESHOLD
OUTPUT
OUTPUT ACTIVE
TIME
TIMEOUT RECEDING
07
086-
02
3
Figure 33. Positive Timeout in Negative Threshold Mode
Shortens Period of Missing Output Trigger
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| AD7151BRMZ-REEL | 功能描述:IC CAP CONV 1CH ULT LP 10MSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 傳感器和探測器接口 系列:- 其它有關(guān)文件:Automotive Product Guide 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:74 系列:- 類型:觸控式傳感器 輸入類型:數(shù)字 輸出類型:數(shù)字 接口:JTAG，串行 電流 - 電源:100µA 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:20-TSSOP 包裝:管件 |
| AD7152 | 制造商:AD 制造商全稱:Analog Devices 功能描述:12-Bit Capacitance-to-Digital Converter |
| AD7152BRMZ | 功能描述:IC CDC 12BIT 2/4CH 10MSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Data Converter Basics 標(biāo)準(zhǔn)包裝:1 系列:- 類型:電機(jī)控制 分辨率（位）:12 b 采樣率（每秒）:1M 數(shù)據(jù)接口:串行，并聯(lián) 電壓電源:單電源 電源電壓:2.7 V ~ 3.6 V，4.5 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:100-TQFP 供應(yīng)商設(shè)備封裝:100-TQFP（14x14） 包裝:剪切帶 (CT) 其它名稱:296-18373-1 |
| AD7152BRMZ-REEL | 功能描述:IC CDC 12BIT 2/4CH 10MSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| AD7153 | 制造商:AD 制造商全稱:Analog Devices 功能描述:12-Bit Capacitance-to-Digital Converter |
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