1 Features
• 3.3V or 5V single supply with integrated DC/DC
converter
• ±250mV input voltage range optimized for current
measurement using shunt resistors
• Fixed gain: 8.2
• Low DC errors:
– Offset voltage: ±150μV (max)
– Offset drift: ±1μV/°C (max)
– Gain error: ±0.2% (max)
– Gain error drift: ±40ppm/°C (max)
– Nonlinearity: ±0.04% (max)
• High CMTI: 85kV/μs (min)
• System-level diagnostic features
• Meets CISPR-11 and CISPR-25 EMI standards
• Safety-related certifications:
– 6000VPK reinforced isolation per DIN EN IEC
60747-17 (VDE 0884-17)
– 4250VRMS isolation for 1 minute per UL1577
• Fully specified over the extended industrial
temperature range: –40°C to +125°C

2 Applications
• Isolated shunt-based current sensing in:
– Protection relays
– Motor drives
– Power supplies
– Photovoltaic inverters

3 Description
The AMC3301 is a precision, isolated amplifier
optimized for shunt-based current measurements.
The fully integrated, isolated DC/DC converter allows
single-supply operation from the low-side of the
device, which makes the device a unique solution
for space-constrained applications. The reinforced
capacitive isolation barrier is certified according to
DIN EN IEC 60747-17 (VDE 0884-17) and UL1577
and supports a working voltage of up to 1.2kVRMS.
The isolation barrier separates parts of the system
that operate on different common-mode voltage levels
and protects the low-voltage side from hazardous
voltages and damage.
The input of the AMC3301 is optimized for direct
connection to a low-impedance shunt resistor or other,
low-impedance voltage source with low signal levels.
The excellent DC accuracy and low temperature drift
supports accurate current measurements over the
extended industrial temperature range from –40°C to
+125°C.
The integrated DC/DC converter fault-detection and
diagnostic output pin of the AMC3301 simplify
system-level design and diagnostics.