1 Features
1• ±50-mV input voltage range optimized for current
measurement with shunt resistors
• Manchester coded or uncoded bitstream options
• Excellent DC performance for high-precision
sensing on system level:
– Offset error and drift: ±50 μV, ±1 μV/°C (max)
– Gain error and drift: ±0.2%, ±40 ppm/°C (max)
• 3.3-V operation for reduced power dissipation on
both sides of the isolation barrier
• System-level diagnostic features
• High electromagnetic field immunity
(see the ISO72x Digital Isolator Magnetic-Field
Immunity application report)
• Safety-related certifications:
– 5657-VPK basic isolation per DIN VDE V 0884-
11: 2017-01
– 4000-VRMS isolation for 1 minute per UL1577
– CAN/CSA No. 5A-component acceptance
service notice
and DIN EN 61010-1 end equipment standard

2 Applications
Shunt-resistor-based current sensing in 3-phase
electricity meters

3 Description
The AMC1106 is a precision, delta-sigma (ΔΣ)
modulator with the output separated from the input
circuitry by a capacitive isolation barrier that is highly
resistant to magnetic interference.
The input stage of the AMC1106 is optimized for
direct connection to shunt resistors or other low
voltage-level signal sources commonly used in multiphase
electricity meters to achieve excellent ac and
dc performance. The device low input voltage range
of ±50-mV allows use of small shunt resistor values
to minimize power dissipation. Decimate the output
bitstream of the AMC1106 with an appropriate digital
filter. The MSP430F67x, TMS320F2807x, and
TMS320F2837x microcontrollers, and the AMC1210
integrate these digital filters for seamless operation
with the AMC1106.
On the high-side, the modulator is supplied by a
3.3-V or 5-V power supply (AVDD). The isolated
digital interface operates from a 3.0-V, 3.3-V, or 5-V
power supply (DVDD).
The AMC1106 is specified over the extended
industrial temperature range of –40°C to +125°C.