參數(shù)資料
型號(hào): SX8725E083TRT
廠商: Semtech
文件頁(yè)數(shù): 16/53頁(yè)
文件大?。?/td> 0K
描述: IC DAS PRESSURE/TEMP SENS 12MLPD
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-WFDFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 12-MLPD
包裝: 標(biāo)準(zhǔn)包裝
配用: XE8000EV121-ND - BOARD EVAL FOR SX8723/24
其它名稱: SX8725E083DKR
ADVANCED COMMUNICATIONS & SENSING
V1.8 2009 Semtech Corp.
www.semtech.com
23
SX8725
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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