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參數資料
| 型號： | SX8723E083TRT |
| 元件分類： | ADC |
| 英文描述： | 5-CH 16-BIT PROPRIETARY METHOD ADC, SERIAL ACCESS, PDSO12 |
| 封裝： | 4 X 4 MM, ROHS COMPLIANT, MLPD-12 |
| 文件頁數： | 16/53頁 |
| 文件大小： | 3978K |
| 代理商： | SX8723E083TRT |
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ADVANCED COMMUNICATIONS & SENSING
V1.8 2009 Semtech Corp.
www.semtech.com
23
SX8723
ZoomingADC for Pressure and Temperature Sensing
Over-Sampling Ratio
The over-sampling ratio (OSR) defines the number of integration cycles per elementary conversion. Its value is
set with the word SET_OSR[2:0] in power of 2 steps (see Table 11) given by:
[ ]
0
:
2
_
3
2
OSR
SET
OSR
+
=
Equation 13
SET_OSR[2:0]
(RegACCfg0[4:2])
Over-Sampling Ratio
OSR (-)
000
8
001
16
010
32
011
64
100
128
101
256
110
512
111
1024
Table 11 - Over-Sampling Ratio Settings
Elementary Conversions
As mentioned previously, the whole conversion sequence is made of a set of NELCONV elementary incremental
conversions. This number is set with the word SET_NELC[1:0] in power of 2 steps (see Table 12) given by:
[ ]
0
:
1
_
2
NELC
SET
ELCONV
N
=
Equation 14
SET_NELC[1:0]
(RegACCfg0[6:5])
# of Elementary
Conversions
NELCONV (-)
00
1
01
2
10
4
11
8
Table 12 - Number of Elementary Conversion Settings
As already mentioned, NELCONV must be equal or greater than 2 to reduce internal amplifier offsets.
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