1 Features
• Linear input voltage range: –0.25 V to 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 V
0884-11: 2017-01
– 5000-VRMS isolation for 1 minute per UL1577
• Fully specified over the extended industrial
temperature range: –40°C to +125°C

2 Applications
• Isolated DC voltage sensing in:
– Motor drives
– Frequency inverters
– Solar inverters
– Power supplies

3 Description
The AMC1351 is a precision, isolated amplifier
with an output separated from the input circuitry
by an isolation barrier that is highly resistant to
magnetic interference. This barrier is certified to
provide reinforced galvanic isolation of up to 5 kVRMS
according to VDE V 0884-11 and UL1577, and
supports a working voltage of up to 1.5 kVRMS.
The isolation barrier separates parts of the system
that operate on different common-mode voltage levels
and protects the low-voltage side from potentially
harmful voltages and damage.
The high-impedance input of the AMC1351 is
optimized for connection to high-impedance resistive
dividers or other voltage signal sources with high
output resistance. The excellent accuracy and low
temperature drift supports accurate DC voltage
sensing in DC/DC converters, frequency inverters,
motor-drive, or other applications over the extended
industrial temperature range from –40°C to +125°C.