参数资料
型号: XE8801AMI000WP
厂商: Semtech
文件页数: 132/135页
文件大小: 0K
描述: SENSING MACHINE WITH 16 + 10 BIT
标准包装: 558
系列: XE880x
应用: 感测机
核心处理器: Coolrisc816?
程序存储器类型: 闪存(22 kB)
控制器系列: XE8000
RAM 容量: 512 x 8
接口: UART,USRT
输入/输出数: 24
电源电压: 2.4 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 模具
包装: 托盘
配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
其它名称: Q2722595
Semtech 2005
www.semtech.com
16-11
XE8801A – SX8801R
16.6.3
PGA2
The second PGA has a finer gain and offset tuning capability, as shown in Table 16-15 and Table 16-16. The voltage
VD2 at the output of PGA2 is given by:
REF
D
V
GDoff
V
GD
V
=
2
1
2
(V)
(Eq. 6)
where GD2 and GDoff2 are respectively the gain and offset of PGA2 (in V/V). These are controlled with the words
PGA2_GAIN[1:0]
and PGA2_OFFSET[3:0].
As shown in equation 6, the offset correction is directly proportional to the reference voltage. All drifts and
perturbations on the reference voltage will affect the precision of the offset compensation.
16.6.4
PGA3
The finest gain and offset tuning is performed with the third and last PGA stage, according to the coding of Table
16-17 and Table 16-18. The output of PGA3 is also the input of the ADC. Thus, similarly to PGA2, we find that the
voltage entering the ADC is given by:
REF
D
ADC
IN
V
GDoff
V
GD
V
=
3
2
3
,
(V)
(Eq. 7)
where GD3 and GDoff3 are respectively the gain and offset of PGA3 (in V/V). The control words are
PGA3_GAIN[6:0]
and PGA3_OFFSET[6:0] . To remain within the signal compliance of the PGA stages, the
condition:
DD
D
V
<
2
1 ,
(V)
(Eq. 8)
must be verified.
As shown in equation 7, the offset correction is directly proportional to the reference voltage. All drifts and
perturbations on the reference voltage will affect the precision of the offset compensation.
Finally, combining equations Eq. 5 to Eq. 7 for the three PGA stages, the input voltage VIN,ADC of the ADC is related
to VIN by:
REF
TOT
IN
TOT
ADC
IN
V
GDoff
V
GD
V
=
,
(V)
(Eq. 9)
where the total PGA gain is defined as:
1
2
3
GD
TOT
=
(V/V)
(Eq. 10)
and the total PGA offset is:
2
3
GDoff
GD
GDoff
TOT
+
=
(V/V)
(Eq. 11)
Not
Recommended
for
New
Designs
相关PDF资料
PDF描述
XE8802MI035LF IC DAS 16BIT FLASH 8K 100-LQFP
XE8805AMI028LF IC DAS 16BIT FLASH 8K MTP 64LQFP
XE8807AMI026TLF IC MCU LOW PWR MTP FLASH 32-TQFP
XIO2200AGGW IC PCI-EXPRESS/BUS BRIDGE 176BGA
XIO2200AZGW IC PCI-EXPRESS/BUS BRIDGE 176BGA
相关代理商/技术参数
参数描述
XE8801AMI027LF 功能描述:IC DAS 16BIT FLASH 8K MTP 44LQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器 - 特定应用 系列:XE880x 产品变化通告:Product Discontinuation 26/Aug/2009 标准包装:250 系列:- 应用:网络处理器 核心处理器:4Kc 程序存储器类型:- 控制器系列:- RAM 容量:16K x 8 接口:以太网,UART,USB 输入/输出数:- 电源电压:1.8V, 3.3V 工作温度:- 安装类型:表面贴装 封装/外壳:208-LQFP 包装:带卷 (TR) 供应商设备封装:PG-LQFP-208 其它名称:SP000314382
XE8802 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Sensing Machine Data Acquisition MCU
XE8802MI000 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Sensing Machine Data Acquisition MCU
XE8802MI035LF 功能描述:IC DAS 16BIT FLASH 8K 100-LQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器 - 特定应用 系列:XE880x 产品变化通告:Product Discontinuation 26/Aug/2009 标准包装:250 系列:- 应用:网络处理器 核心处理器:4Kc 程序存储器类型:- 控制器系列:- RAM 容量:16K x 8 接口:以太网,UART,USB 输入/输出数:- 电源电压:1.8V, 3.3V 工作温度:- 安装类型:表面贴装 封装/外壳:208-LQFP 包装:带卷 (TR) 供应商设备封装:PG-LQFP-208 其它名称:SP000314382
XE8805 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Data Acquisition MCU