參數(shù)資料
型號: AD7151BRMZ
廠商: Analog Devices Inc
文件頁數(shù): 9/28頁
文件大?。?/td> 0K
描述: IC CAP CONV 1CH ULT LP 10MSOP
特色產品: AD715x Series Capacitance-to-Digital Converters & Evaluation Board
標準包裝: 50
類型: 電容數(shù)字轉換器
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)
供應商設備封裝: 10-MSOP
包裝: 管件
產品目錄頁面: 781 (CN2011-ZH PDF)
AD7151
Rev. 0 | Page 17 of 28
TIMEOUT REGISTER
When either the approaching or receding timeout elapses (that
is, after the defined number of CDC conversions is counted),
the data average (and thus the thresholds) is forced to follow the
new CDC data value immediately.
Address Pointer 0x0A
8 Bits, Read/Write, Factory Preset 0x86
Table 9. Timeout Register Bit Map
Bit
Bits [7:4]
When the timeout register equals 0, timeouts are disabled.
Bits [3:0]
Mnemonic
TimeOutApr
TimeOutRec
Default
0x08
0x06
DATA AVERAGE
+ SENSITIVITY
LARGE CHANGE IN DATA
TOWARDS THRESHOLD
DATA AVERAGE
THRESHOLD
TIME
TIMEOUT APPROACHING
07
08
6-
0
2
6
The register sets timeouts for the adaptive threshold mode.
The approaching timeout starts when the CDC data crosses the
data average ± sensitivity band toward the threshold, according
to the selected positive, negative, or window threshold mode. The
approaching timeout elapses after the number of conversion cycles
equals 2TimeOutApr, where TimeOutApr is the value of the four most
significant bits of the timeout register.
Figure 37. Threshold Timeout Approaching
After a Large Change in CDC Data Toward Threshold
The receding timeout starts when the CDC data crosses the
data average ± sensitivity band away from the threshold,
according to the selected positive or negative threshold mode.
The receding timeout is not used in the window threshold
mode. The receding timeout elapses after the number of
conversion cycles equals 2TimeOutRec, where TimeOutRec is the
value of the four least significant bits of the timeout register.
DATA AVERAGE
+ SENSITIVITY
LARGE CHANGE IN DATA
AWAY FROM THE THRESHOLD
DATA AVERAGE
THRESHOLD
TIME
TIMEOUT RECEDING
07
08
6-
0
27
Figure 38. Threshold Timeout Receding
After a Large Change in CDC Data Away from Threshold
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