VREFP V
參數(shù)資料
型號: XE8805AMI028LF
廠商: Semtech
文件頁數(shù): 153/156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
16-10
XE8805/05A
VMUX
(RegAcCfg5[0])
VREFP
VREFN
0
AC_R(1)
AC_R(0)
1
AC_R(3)
AC_R(2)
Table 16-12. Analog Reference input selection
16.6
Programmable Gain Amplifiers
As seen in Figure 16-1, the zooming function is implemented with three programmable gain amplifiers (PGA).
These are:
PGA1: coarse gain tuning
PGA2: medium gain and offset tuning
PGA3: fine gain and offset tuning
All gain and offset settings are realized with ratios of capacitors. The user has control over each PGA activation
and gain, as well as the offset of stages 2 and 3. These functions are examined hereafter.
ENABLE[3:0]
Block
xxx0
xxx1
ADC disabled
ADC enabled
xx0x
xx1x
PGA1 disabled
PGA1 enabled
x0xx
x1xx
PGA2 disabled
PGA2 enabled
0xxx
1xxx
PGA3 disabled
PGA3 enabled
Table 16-13. ADC & PGA enabling
PGA1_GAIN
PGA1 Gain
GD1 (V/V)
0
1
10
Table 16-14. PGA1 Gain Settings
PGA2_GAIN[1:0]
PGA2 Gain
GD2 (V/V)
00
1
01
2
10
5
11
10
Table 16-15. PGA2 gain settings
Not
Recommended
for
New
Designs
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