www.semtech.com/products/ Page 16 ADVANCED COMMUNICATIONS & SENSING DATASHEET SX8725C ZoomingADC fo" />
參數(shù)資料
型號: SX8725CWLTDT
廠商: Semtech
文件頁數(shù): 8/68頁
文件大?。?/td> 0K
描述: IC DAS ADC 16BIT I2C/SRL
標準包裝: 1
系列: ZoomingADC™
類型: 數(shù)據(jù)采集系統(tǒng)(DAS)
輸入類型: 差分
輸出類型: 數(shù)字
接口: I²C
安裝類型: 表面貼裝
封裝/外殼: 12-WDFN 裸露焊盤
供應商設備封裝: 12-MLPD-EP(4x4)
包裝: 標準包裝
其它名稱: SX8725CWLTDTDKR
www.semtech.com/products/
Page 16
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
SX8725C
ZoomingADC for sensing data acquisition
Revision 1.01
January 2011
Semtech
6.3.1 Optional Operating Mode: External Vref
D0 and D1 are multi-functional pins with the following functions in different operating modes (see RegMode register
for control settings):
This allows external monitoring of the internal bandgap reference or the ability to use an external reference input for
the ADC, or the option to filter the internal VREF output before feeding back as VREF,ADC input. The internally generated
VREF is a trimmed as ADC reference with a nominal value of 1.22V. When using an external VREF,ADC input, it may have
any value between 0V and VBATT. Simply substitute the external value for 1.22 V in the ADC conversion calculations.
Figure 6. D0 and D1 are Digital Inputs / Outputs
Figure 7. D1 is Reference Voltage Input and D0 is Digital
Input / Output
Figure 8. D1 is Digital Input / Output and D0 Reference
Voltage Output
Figure 9. D0 is Reference Voltage Output and D1 is Reference
Voltage Input
+
-
D1/VREFIN
D0/VREFOUT
RegMode[0] = 0
0
1
RegMode[1] = 0
0
1
0
1
GPIO
ZoomingADC
GPIO
Internal
Bandgap
reference
VBG
VREF
+
-
D1/VREFIN
D0/VREFOUT
RegMode[0] = 1
0
1
RegMode[1] = 0
0
1
0
1
GPIO
ZoomingADC
GPIO
Internal
Bandgap
reference
VREF
+
-
D1/VREFIN
D0/VREFOUT
RegMode[0] = 0
0
1
RegMode[1] = 1
0
1
0
1
GPIO
ZoomingADC
GPIO
Internal
Bandgap
reference
VBG
VREF
+
-
D1/VREFIN
D0/VREFOUT
RegMode[0] = 1
0
1
RegMode[1] = 1
0
1
0
1
GPIO
ZoomingADC
GPIO
Internal
Bandgap
reference
VBG
VREF
Not
Recommended
for
New
Designs
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