1 Features
• 3.3V or 5V single supply operation with integrated
DC/DC converter
• ±1V input voltage range optimized for voltage
measurements with high input impedance
• Fixed gain: 2.0
• Low DC errors:
– Gain error: ±0.2% (max)
– Gain drift: ±45ppm/°C (max)
– Offset error: ±0.3mV (max)
– Offset drift: ±4μV/°C (max)
– Nonlinearity: ±0.02% (max)
• High CMTI: 85kV/μs (min)
• System-level diagnostic features
• Safety-related certifications:
– 6000VPK reinforced isolation per DIN EN IEC
60747-17 (VDE 0884-17)
– 4250VRMS isolation for 1 minute per UL1577
• Meets CISPR-11 and CISPR-25 EMI standards

2 Applications
• Isolated voltage sensing in:
– Motor drives
– Photovoltaic inverters
– Power delivery systems
– EV charging infrastructure
– Battery energy storage systems

3 Description
The AMC3330 is a precision, isolated amplifier with
a fully integrated, isolated DC/DC converter that
allows single-supply operation from the low-side of
the device. The reinforced capacitive isolation barrier
is certified according to DIN EN IEC 60747-17 (VDE
0884-17) and UL1577 and separates sections of
the system that operate on different common-mode
voltage levels and protects low-voltage domains from
damage.
The input of the AMC3330 is optimized for
direct connection to high-impedance, voltage-signal
sources such as a resistor-divider network to
sense high-voltage signals. The integrated isolated
DC/DC converter allows measurement of non-groundreferenced
signals and makes the device a unique
solution for noisy, space-constrained applications.
The excellent performance of the device supports
accurate voltage monitoring and control. The
integrated DC/DC converter fault-detection and
diagnostic output pin of the AMC3330 simplify
system-level design and diagnostics.
The AMC3330 is specified over the temperature
range of –40°C to +125°C.