参数资料
型号: 71M6541F-DB
厂商: Maxim Integrated Products
文件页数: 13/166页
文件大小: 0K
描述: DEMO BOARD 71M6541F
标准包装: 1
系列: *
71M6541D/F/G and 71M6542F/G Data Sheet
Figure 3 shows the 71M6541D/F/G multiplexer interface with one local and one remote resistive shunt
sensor. As seen in Figure 3 , when a remote isolated shunt sensor is connected via the 71M6x01, the
samples associated with this current channel are not routed to the multiplexer, and are instead
transferred digitally to the 71M6541D/F/G via the digital isolation interface and are directly stored in CE
RAM.
See Figure 6 for the multiplexer timing sequence corresponding to Figure 3 . See Figure 36 for the meter
configurations corresponding to Figure 3 .
I LINE
VREF
IAP
MUX
?Σ ADC
Local
Shunt
IAN
VREF
CONVERTER
VREF
VADC10 (VA)
VADC
FIR
22
CE RAM
IN*
Remote
INP
SP
IBP
Digital
Shunt
71M6x01
S N
IBN
Isolation
Interface
22
INN
71M6541D/F
11/5/2010
* IN = Optional Neutral Current
Figure 3. 71M6541D/F/G AFE Block Diagram with 71M6x01
Figure 4 shows the 71M6542F/G AFE with locally connected sensors. The analog input signals (IAP-IAN,
VA, IBP-IBN and VB) are multiplexed to the ADC input and sampled by the ADC. The ADC output is
decimated by the FIR filter and stored in CE RAM where it can be accessed and processed by the CE.
See Figure 7 for the multiplexer timing sequence corresponding to Figure 4 . See Figure 37 for the meter
configuration corresponding to Figure 4 .
VREF
IA
IA
IAP
MUX
?Σ ADC
CT
or
Local
Shunt
IAN
VREF
VADC
CONVERTER
VREF
FIR
22
CE RAM
VADC10 (VA)
VADC9 (VB)
IB
IBP
CT
IBN
71M6542F
11/5/2010
Figure 4. 71M6542F/G AFE Block Diagram (Local Sensors)
Rev 4
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