LMP90080/LMP90079/LMP90078/LMP90077
目录
1.0概述......................................................................................................................... 1
2.0产品特点........................................................................................................................................ 1
3.0主要规格........................................................................................................................... 1
4.0应用.................................................................................................................................... 1
5.0典型应用........................................................................................................................... 1
6.0框图................................................................................................................................ 2
7.0订购信息........................................................................................................................五
8.0连接图........................................................................................................................五
9.0引脚说明.............................................................................................................................. 6
10.0绝对最大额定值............................................................................................................. 7
11.0工作额定值.......................................................................................................................... 7
12.0电气特性................................................................................................................ 7
13.0时序图......................................................................................................................... 12
14.0的具体定义...................................................................................................................... 15
15.0典型性能特征.............................................. ................................................ 16
16.0功能描述.................................................................................................................. 21
16.1信号路径..................................................................................................................... 21
16.1.1参考输入（ VREF ） .......................................... .................................................. .. 21
16.1.2灵活的输入多路复用器（ VIN ） ......................................... .................................................. .. 21
16.1.3可选增益（ FGA & PGA ） ........................................ ............................................ 22
16.1.4缓冲器（ BUFF ） ............................................................................................................ 22
16.1.5内部/外部CLK选择.......................................... .......................................... 22
16.1.6可编程的ODR ............................................. .................................................. ... 22
16.1.7数字滤波器............................................................................................................... 24
16.1.8 GPIO （D0 -D 6） ........................................................................................................... 27
16.2校准..................................................................................................................... 27
16.2.1后台校准............................................. .................................................. 27
16.2.2系统校准...................................................................................................... 28
图15.后校准标定数据流图....................................... ............ 29
16.3 CHANNELS扫描模式..................................................................................................... 29
16.4传感器接口..........................................................................................................三十
16.4.1 IB1 & IB2 - 激励电流（ LMP90080 / LMP90078 ） .................................... ............... 30
16.4.2熔断电流........................................................................................................三十
16.4.3传感器诊断标志............................................ ..................................................三十
16.5串行数字接口.............................................. ................................................. 32
16.5.1寄存器地址（ ADDR ） .......................................... .................................................. 32
16.5.2寄存器读/写协议.......................................... ............................................. 32
16.5.3流.................................................................................................................. 32
16.5.4 CSB - 片选.......................................... .................................................. ..... 33
16.5.5 SPI复位.................................................................................................................. 33
16.5.6 DRDYB - 数据就绪酒吧.......................................... .................................................. 33
16.5.7数据只读事务........................................... ............................................. 36
16.5.8循环冗余校验（CRC） ......................................... ........................................ 37
16.6电源管理...................................................................................................... 38
16.7复位并重启.......................................................................................................... 38
17.0应用信息............................................................................................................... 39
17.1快速入门..................................................................................................................... 39
17.2连接耗材.............................................. ............................................... 39
17.2.1 VA和VIO ............................................................................................................... 39
17.2.2 VREF ........................................................................................................................ 39
17.3 ADC_DOUT计算............................................... .................................................. 39
17.4寄存器读/写示例............................................ ....................................... 40
17.4.1写寄存器例子........................................... ............................................ 40
17.4.2读从寄存器例........................................... ........................................ 41
17.5流媒体举例..................................................................................................... 42
17.5.1正常流实例............................................ ............................................. 42
17.5.2控制流实例............................................ ......................................... 43
17.6应用举例............................................... .................................................. 45 ..
17.6.1 3线RTD ............................................................................................................... 45
17.6.2热电偶和IC模拟温度.......................................... .......................... 47
18.0寄存器.................................................................................................................................... 48
18.1寄存器映射.................................................................................................................. 48
18.2电源和重置寄存器............................................. ........................................... 49
18.3 ADC寄存器................................................................................................................ 51
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