參數(shù)資料
型號(hào): XE8000EV120
廠商: Semtech
文件頁(yè)數(shù): 56/108頁(yè)
文件大?。?/td> 0K
描述: BOARD EVAL FOR SX8722I070TRLF
標(biāo)準(zhǔn)包裝: 1
系列: ZoomingADC™
ADC 的數(shù)量: 1
位數(shù): 16
數(shù)據(jù)接口: I²C
工作溫度: -40°C ~ 125°C
已用 IC / 零件: SX8722
已供物品: 板,CD
產(chǎn)品目錄頁(yè)面: 585 (CN2011-ZH PDF)
相關(guān)產(chǎn)品: SX8722I070LFDKR-ND - IC ZOOMING ADC 10BIT 16CH 44MLPQ
SX8722I070LFCT-ND - IC ZOOMING ADC 10BIT 16CH 44MLPQ
SX8722I070LFTR-ND - IC ZOOMING ADC 10BIT 16CH 44MLPQ
其它名稱: XM8000EV120
XM8000EV120-ND
ACS - Revision 4.2
October 2008
2008 Semtech Corp.
www.semtech.com
Page 51
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
SX8722
High gain acquisition for sensor interface
12. ZoomingADC
12.1. ZoomingADC Features
The ZoomingADC is a complete and versatile low-power analog front-end interface typically intended for sensing
applications.
The key features of the ZoomingADC are:
Programmable 6 to 16-bit dynamic range oversampled ADC
Flexible gain programming between 0.5 and 1000
Flexible and large range offset compensation
4-channel differential or 8-channel single-ended input multiplexer
2-channel differential reference inputs
Power saving modes
12.1.1. Overview
Figure 31. ZoomingADC general functional block diagram
The total acquisition chain consists of an input multiplexer, 3 programmable gain amplifier stages and an oversampled A/D
converter. The reference voltage can be selected on two different channels. Two offset compensation amplifiers allow for a
wide offset compensation range. The programmable gain and offset allow to zoom in on a small portion of the reference
voltage defined input range.
12.2. Acquisition Chain
The figure above shows the general block diagram of the acquisition chain (AC).
Analog inputs can be selected among eight input channels, while reference input is selected between two differential
channels.
+
-
+
-
+
-
PGA2
+
-
+
-
ADC
+
-
PGA1
PGA3
+
-
+
-
1
2
3
4
5
6
7
0
1
2
3
+
-
+
-
OFF3
OFF2
AC
AR
MUX
MU
X
VIN, ADC
VIN
VREF
fS
16 bits
Not
Recommended
for
New
Designs
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