REF ADC IN ADC V FS OUT (Eq. 1)
參數(shù)資料
型號: XE8805AMI028LF
廠商: Semtech
文件頁數(shù): 148/156頁
文件大?。?/td> 0K
描述: IC DAS 16BIT FLASH 8K MTP 64LQFP
標(biāo)準(zhǔn)包裝: 160
系列: XE880x
應(yīng)用: 感測機(jī)
核心處理器: Coolrisc816?
程序存儲器類型: 閃存(22 kB)
控制器系列: XE8000
RAM 容量: 512 x 8
接口: UART,USRT
輸入/輸出數(shù): 24
電源電壓: 2.4 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 64-LQFP
包裝: 托盤
供應(yīng)商設(shè)備封裝: 64-LQFP(10x10)
產(chǎn)品目錄頁面: 585 (CN2011-ZH PDF)
配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
Semtech 2006
www.semtech.com
16-5
XE8805/05A
2
/
2
/
,
REF
ADC
IN
ADC
V
FS
OUT
(Eq. 1)
in two's complement (see Sections 16.4 and 16.7 for details). The output code OUTADC is -FS/2 to +FS/2 for VIN,ADC
-V
REF/2 to +VREF/2 respectively. As will be shown in section 16.6, VIN,ADC is related to input voltage VIN by the
relationship:
REF
TOT
IN
TOT
ADC
IN
V
GDoff
V
GD
V
=
,
(V)
(Eq. 2)
where GDTOT is the total PGA gain, and GDoffTOT is the total PGA offset.
PGA1
PGA2
PGA3
ADC
MU
X
Register Bank
Acquisition Chain
GD1
GD2
GD3
OFF2
OFF3
0
1
2
3
4
5
6
7
0
1
2
3
AC_A
AC_R
RegACOutLSB
RegACOutMSB
8
Sampling Frequency f
S
ADC Busy Flag
Default Settings
Conversion Start
Nbr of Elementary Cycles
Over-Sampling Ratio
Continuous vs. On-Request
Power Saving Modes
PGA Enabling
RegACCfg5
RegACCfg4
RegACCfg3
RegACCfg2
RegACCfg1
RegACCfg0
5
2
4
7
Inputs
V
IN
f
S
V
REF
V
IN,ADC
f
S
MU
X
Figure 16-2. ZoomingADC
detailed functional block diagram
Not
Recommended
for
New
Designs
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