1 Features
• 3.3-V or 5-V single supply with integrated DC/DC
converter
• ±1-V input voltage range optimized for voltage
measurements
• Input resistance: 1 GΩ (typ)
• Low DC errors:
– Offset error: ±0.3 mV (max)
– Offset drift: ±4 μV/°C (max)
– Gain error: ±0.2% (max)
– Gain drift: ±40 ppm/°C (max)
• High CMTI: 90 kV/μs (min)
• System-level diagnostic features
• Low EMI: Meets CISPR-11 and CISPR-25
standards
• Safety-related certifications:
– 6000-VPEAK 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 voltage sensing in:
– Motor drives
– Photovoltaic inverters
– Power delivery systems
– Protection relays

3 Description
The AMC3336 is a precision, isolated delta-sigma
(ΔΣ) modulator, optimized for high-impedance AC
voltage 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 AMC3336 is optimized for direct
connection to a resistor network or other, highimpedance
voltage-signal source. The excellent DC
accuracy and low temperature drift support accurate
voltage measurements over the extended industrial
temperature range from –40°C to +125°C.
By using a digital filter (such as a sinc3 filter) to
decimate the bitstream, the device can achieve 16
bits of resolution with a dynamic range of 85 dB at a
data rate of 78 kSPS.