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ES51998 参数 Datasheet PDF下载

ES51998图片预览
型号: ES51998
PDF下载: 下载PDF文件 查看货源
内容描述: DMM模拟前端/绝缘 [DMM Analog front end/Insulation]
分类和应用:
文件页数/大小: 31 页 / 989 K
品牌: CYRUSTEK [ Cyrustek corporation ]
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ES51998(60000counts)  
DMM Analog front end/Insulation  
2.11 Insulation resistance measurement mode  
The ES51998 is built-in analog switches network to support the insulation resistance  
measurement mode. By implementation of external high voltage source, the insulation  
resistance could be obtained from SADC output of ES51998 and calculated by  
microprocessor easily. The insulation mode is separated into two modes which are  
insulation V mode and insulation R mode which are described below.  
Insulation V mode configuration  
F3  
F2  
F1  
F0  
IRV  
AC  
Measurement mode  
Read data bytes  
1
1
1
1
1
0/1  
Insulation (DC/AC) V mode D0(0:18)  
Note1: D0 is binary format. ASIGN is the sign bit D0.  
Insulation V mode  
MCU control  
HV OFF (Discharging mode)  
PTC  
10MΩ  
VA  
VADC  
VR2  
VR3  
VR4  
VR5  
MCU control  
1.11M101K10.01K1KΩ  
VDUT = VA- VB = k * VADC  
VB  
Q1  
IRVG  
Active in insulation V mode  
Note: The on-resistance of internal analog switches could be omitted.  
ver. 1.7  
24  
12/01/12  
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