1 Features
• 3.3-V or 5-V single supply with integrated DC/DC
converter
• ±50-mV input voltage range optimized for current
measurement using shunt resistors
• Fixed gain: 41
• Low DC errors:
– Offset voltage: ±50 μV (max)
– Offset drift: ±0.5 μV/°C (max)
– Gain error: ±0.2% (max)
– Gain error drift: ±35 ppm/°C (max)
– Nonlinearity: ±0.03% (max)
• High CMTI: 95 kV/μs (min)
• System-level diagnostic features
• Meets CISPR-11 and CISPR-25 EMI standards
• Safety-related certifications:
– 6000-VPK reinforced isolation per DIN VDE V
0884-11
– 4250-VRMS isolation for 1 minute per UL1577
• Fully specified over the extended industrial
temperature range: –40°C to +125°C

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

3 Description
The AMC3302 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
VDE V 0884-11 and UL1577 and supports a working
voltage of up to 1.2 kVRMS.
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 AMC3302 is optimized for direct
connection to a low-impedance shunt resistor
or another 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 AMC3302 simplify
system-level design and diagnostics.