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.