71m6541g-igtr/f Maxim Integrated Products, Inc., 71m6541g-igtr/f Datasheet - Page 12
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71m6541g-igtr/f
Manufacturer Part Number
71m6541g-igtr/f
Description
71m6541d/71m6541f/71m6542f Energy Meter Ics
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.71M6541G-IGTRF.pdf
(165 pages)
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transformers (CTs) and their corresponding signal conditioning circuits can be characterized and their
correction factors can be programmed to produce electricity meters with exceptional accuracy over the
industrial temperature range.
One of the two internal UARTs is adapted to support an Infrared LED with internal drive and sense configuration
and can also function as a standard UART. The optical output can be modulated at 38 kHz. This flexibility
makes it possible to implement AMR meters with an IR interface. A block diagram of the IC is shown in
Figure
2.2
The AFE functions as a data acquisition system, controlled by the MPU. When used with locally
connected sensors, as seen in
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
12
Figure 6
I
LINE
CT
1.
Analog Front End (AFE)
or
CT
for the multiplexer sequence corresponding to
IN*
Shunt
Local
I
LINE
VADC10 (VA)
Figure 2. 71M6541D/F AFE Block Diagram (Local Sensors)
IBN
IBP
IAN
IAP
© 2008–2011 Teridian Semiconductor Corporation
Figure
Figure
*IN = Optional Neutral Current
2.
2, the analog input signals (IAP-IAN, VA and IBP-IBN) are
MUX
VREF
VADC
Figure
VREF
71M6541D/F
2. See
VREF
CONVERTER
∆Σ ADC
Figure 35
FIR
22
for the meter
CE RAM
11/5/2010
v1.1
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