Description:

The AMC1350 is a precision, isolated amplifierwith an output separated from the input circuitryby an isolation barrier that is highly resistant tomagnetic interference. This barrier is certified toprovide reinforced galvanic isolation of up to 5 kVRMSaccording to VDE V 0884-11 and UL1577, andsupports a working voltage of up to 1.5 kVRMS.The isolation barrier separates parts of the systemthat operate on different common-mode voltage levelsand protects the low-voltage side from potentiallyharmful voltages and damage.The high-impedance input of the AMC1350 isoptimized for connection to high-impedance resistivedividers or other voltage signal sources with highoutput resistance. The excellent accuracy and lowtemperature drift supports accurate AC and DCvoltage sensing in DC/DC converters, frequencyinverters, AC motor, and servo-drive applications overthe extended industrial temperature range from –40°Cto +125°C.

Features:

• Linear input voltage range: ±5 V

• High input impedance: 1.25 MΩ (typ)

• Fixed gain: 0.4 V/V

• Low DC errors:

– Offset error ±1.5 mV (max)

– Offset drift: ±15 μV/°C (max)

– Gain error: ±0.2% (max)

– Gain drift: ±35 ppm/°C (max)

– Nonlinearity ±0.02% (max)

• Operation on high-side and low-side: 3.3 V or 5 V

• High CMTI: 100 kV/μs (min)

• Fail-safe output

• Safety-related certifications:

– 7070-VPK reinforced isolation per DIN VDE V0884-11: 2017-01

– 5000-VRMS isolation for 1 minute per UL1577

• Fully specified over the extended industrialtemperature range: –40°C to +125°C2 

Applications:

• Isolated AC voltage sensing in:

– Motor drives

– Frequency inverters

– Protection relays

– Power supplies