1 Features

• AEC-Q100 qualified for automotive applications:

– Temperature grade 1: –40°C to +125°C, TA

• 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

2 Applications

• Isolated voltage sensing in:

– HEV/EV onboard chargers (OBC)

– HEV/EV DC/DC converters

– HEV/EV traction inverters

3 Description

The AMC3311-Q1 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-Q1 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-Q1 is offered in a wide-body, 16-pin

SOIC package, and is specified over the temperature

range of –40°C to +125°C.