參數(shù)資料
型號: SX8722I070TRLF
廠商: Semtech
文件頁數(shù): 20/108頁
文件大?。?/td> 0K
描述: IC ZOOMING ADC 10BIT 16CH 44MLPQ
標準包裝: 1
類型: 壓力傳感器
輸入類型: 邏輯
輸出類型: 邏輯
接口: I²C
電流 - 電源: 300µA
安裝類型: 表面貼裝
封裝/外殼: 44-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 44-MLPQ(7x7)
包裝: 標準包裝
產(chǎn)品目錄頁面: 585 (CN2011-ZH PDF)
配用: XE8000EV120-ND - BOARD EVAL FOR SX8722I070TRLF
其它名稱: SX8722I070LFDKR
ACS - Revision 4.2
October 2008
2008 Semtech Corp.
www.semtech.com
Page 19
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
SX8722
High gain acquisition for sensor interface
5.3. ZoomingADC
The SX8722 core is the ZoomingADC, the diagram below shows more in detail the architecture of this acquisition chain.
Figure 6. Acquisition chain architecture
The block schematic above is separated in function boxes:
A. Input multiplexers
Routing of the input signal.
Routing of the reference.
B. Programmable gain amplifiers
Can be enabled/disabled separately.
Each PGA has programmable gain from 1 to 10.
Total PGA gain available = PGA1 x PGA2 x PGA3 = 1000.
C. Offset cancellation
Subtract or add a reference multiple to the input signal.
Can compensate up to 15 times the full scale signal.
D. ADC
Sigma-Delta ADC.
Offers several sampling frequencies.
Over sampling rates and elementary conversion combinations allow setting the ideal resolution for the ideal conversion
time.
E. Measurement engine
Manages up to 4 ZoomingADC configurations.
Updates the measured values.
+
-
-
+
-
PGA2
+
-
+
-
ADC
+
-
PGA1
PGA3
+
-
+
-
1
2
3
4
5
6
7
0
1
2
3
+
-
+
-
OFF3
OFF2
AC
AR
MUX
VIN
VREF
fS
MEASUREMENT
ENGINE
A
B
D
E
C
VIN, ADC
1 - 10
1 - 2 - 5 - 10
5/5
...
-5/5
63/12
...
-63/12
0/12 to 127/12
Not
Recommended
for
New
Designs
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