www.semtech.com/products/ Page 34 ADVANCED COMMUNICATIONS & SENSING DATASHEET SX8725C ZoomingADC fo" />
參數(shù)資料
型號(hào): SX8725CWLTDT
廠商: Semtech
文件頁數(shù): 28/68頁
文件大小: 0K
描述: IC DAS ADC 16BIT I2C/SRL
標(biāo)準(zhǔn)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(yīng)商設(shè)備封裝: 12-MLPD-EP(4x4)
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: SX8725CWLTDTDKR
www.semtech.com/products/
Page 34
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
SX8725C
ZoomingADC for sensing data acquisition
Revision 1.01
January 2011
Semtech
where, from Equation 11 and Equation 12, the total PGA gain and offset are respectively:
and:
Equation 20
Equation 21
Table 19.
Basic ADC Relationships (example for: VREF = 5V, OSR = 512, n = 16bits)
ADC Input Voltage
VIN,ADC
% of Full Scale (FS)
Output in LSBs
Hexadecimal Output Code
+2.49505 V
+0.5 x FS
+2
15-1 = 32’767
7FFF
+2.49497 V
...
+2
15-2 = 32’766
7FFE
...
+76.145
μV
...
+1
0001
0
0000
-76.145
μV
...
-1
FFFF
...
-2.49505 V
...
-2
15-1 = -32’767
8001
-2.49513 V
-0.5 x FS
-2
15 = -32’768
8000
Table 20.
Last forced LSBs in conversion output register for resolution settings smaller than 16bits1
1.
(n<16) (RegACOutMsb[7:0] & RegACOutLsb[7:0])
SetOsr[2:0]
SetNelconv = ‘00’
SetNelconv = ‘01’
SetNelconv = ‘10’
SetNelconv = ‘11’
‘000’
1000000000
100000000
10000000
1000000
‘001’
10000000
1000000
100000
10000
‘010’
100000
10000
1000
100
‘011’
1000
100
10
1
‘100’
10
1
-
‘101’
----
‘110’
----
‘111’
----
1
2
3
GD
TOT
=
2
3
GDoff
GD
GDoff
TOT
+
=
Not
Recommended
for
New
Designs
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