1 Features
• Single-supply operation (3.3 V or 5 V) with
integrated DC/DC converter
• Input voltage range (2 V) optimized for voltage
measurements with high input impedance
• Fixed gain: 1.0
• Low DC errors:
– Offset error: ±1 mV (max)
– Offset drift: ±10 μV/°C (max)
– Gain error: ±0.2% (max)
– Gain drift: ±40 ppm/°C (max)
– Nonlinearity: ±0.02% (max)
• High CMTI: 85 kV/μs (min)
• System-level diagnostic features
• Meets CISPR-11 and CISPR-25 EMI standards
• Safety-related certifications:
– 6000-VPK reinforced isolation per DIN EN IEC
60747-17 (VDE 0884-17)
– 4250-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
– Photovoltaic inverters
– Server power-supply units (PSU)
– DC charging stations

3 Description
The AMC3311 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
highly resistant to magnetic interference, is certified
according to DIN EN IEC 60747-17 (VDE 0884-17)
and UL1577, and supports a working voltage of up to
1200 VRMS.
The isolation barrier separates parts of the system
that operate on different common-mode voltage levels
and protects the low-voltage side from voltage levels
that can cause electrical damage and are potentially
harmful to an operator.
The input of the AMC3311 is optimized for direct
connection to high-impedance resistive dividers
that are typically used for sensing high voltages.
The integrated isolated DC/DC converter allows
measurement of non-ground-referenced signals and
makes the device a unique solution for noisy, spaceconstrained
applications. The high DC accuracy
and low temperature drift support accurate voltage
monitoring and control.
The AMC3311 is offered in a wide-body, 16-pin SOIC
package, and is specified over the temperature range
of –40°C to +125°C.