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| AMC1100_15 Datasheet, PDF (17/33 Pages) Texas Instruments – AMC1100 Fully-Differential Isolation Amplifier | |||
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www.ti.com
AMC1100
SBAS562A â APRIL 2012 â REVISED DECEMBER 2014
Typical Applications (continued)
8.2.2 The AMC1100 in Energy Metering
Resulting from its immunity to magnetic fields, the AMC1100 can be used for shunt-based current sensing in
smart electricity meter (e-meter) designs, as shown in Figure 36. Three AMC1100 devices are used for isolated
current sensing. For voltage sensing, resistive dividers are usually used to reduce the common-mode voltage to
levels that allow non-isolated measurement.
L1
L2
L3
VDD2 = DVDD
VDD1A AMC1100
"/-Modulator
VDD1B AMC1100
VDD1C AMC1100
3x dig. filter for
ADC
currents
MSP430F47167
Metrology
MCU
ADC
DVDD
Sync
ADC
SysCLK
3x dig. filter for
ADC
voltage
Application
Data
MCU
ADC
ADC
Digital Core
N
Figure 36. The AMC1100 in an E-Meter Application
8.2.2.1 Design Requirements
For best performance, an RC low-pass filter can be used in front of the AMC1100. Further improvement can be
achieved by filtering the output signal of the device. In both cases, the values of the resistors and the capacitors
must be tailored to the bandwidth requirements of the system.
Copyright © 2012â2014, Texas Instruments Incorporated
Product Folder Links: AMC1100
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