71M6541F Maxim, 71M6541F Datasheet - Page 13

• Manufacturer Part Number: 71M6541F
• Description: The 71M6541D/71M6541F/71M6541G/71M6542F/71M6542G are Teridian™ 4th-generation single-phase metering SoCs with a 5MHz 8051-compatible MPU core, low-power RTC with digital temperature compensation, flash memory, and LCD driver
• Manufacturer: Maxim

Figure 3
sensor. As seen in
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
configurations corresponding to
Figure 4
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
configuration corresponding to
Rev 2
Remote
Shunt
IA
CT
Figure 6
Figure 7
IN*
shows the 71M6541D/F/G multiplexer interface with one local and one remote resistive shunt
shows the 71M6542F/G AFE with locally connected sensors. The analog input signals (IAP-IAN,
or
CT
IB
INN
Shunt
INP
Local
for the multiplexer timing sequence corresponding to
for the multiplexer timing sequence corresponding to
IA
VADC10 (VA)
VADC9 (VB)
71M6x01
Figure
Figure 3. 71M6541D/F/G AFE Block Diagram with 71M6x01
Figure 4. 71M6542F/G AFE Block Diagram (Local Sensors)
IBN
IBP
Shunt
IAN
Local
IAP
I
3, when a remote isolated shunt sensor is connected via the 71M6x01, the
LINE
SP
SN
VADC10 (VA)
Figure
Figure
IBN
IAN
IBP
IAP
MUX
4.
3.
* IN = Optional Neutral Current
Interface
Isolation
MUX
VREF
Digital
VADC
VREF
71M6541D/F/G and 71M6542F/G Data Sheet
71M6542F
VREF
VADC
VREF
CONVERTER
Figure
Figure
∆Σ ADC
VREF
71M6541D/F
FIR
3. See
4. See
VREF
CONVERTER
22
∆Σ ADC
22
FIR
Figure 36
Figure 37
CE RAM
11/5/2010
11/5/2010
22
for the meter
CE RAM
for the meter
13