1 Features

• AEC-Q100 qualified for automotive applications:

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

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• ±250-mV input voltage range optimized for current

measurements using shunt resistors

• Fixed gain: 8.2 V/V

• Low DC errors:

– Offset error: ±0.2 mV (max)

– Offset drift: ±0.9 μV/°C (max)

– Gain error: ±0.3 (max)

– Gain drift: ±30 ppm/°C (max)

– Nonlinearity: 0.03 (max)

• 3.3-V or 5-V operation on high-side and low-side

• Missing high-side supply detection feature

• High CMTI: 100 kV/μs (min)

• Low EMI, meets CISPR-11 and CISPR-25

standards

• Safety-related certifications:

– 10600-VPK reinforced isolation per DIN EN IEC

60747-17 (VDE 0884-17)

– 7500-VRMS isolation for 1 minute per UL1577

2 Applications

• Shunt-resistor-based current sensing in:

– HEV/EV charging piles

– HEV/EV on-board chargers (OBC)

– HEV/EV DC/DC converters

– HEV/EV traction inverters

3 Description

The AMC1400-Q1 is a precision, isolated amplifier

with an output separated from the input circuitry by

an isolation barrier that is highly resistant to magnetic

interference. This barrier is certified to provide

reinforced galvanic isolation of up to 7.5 kVRMS

according to DIN EN IEC 60747-17 (VDE 0884-17)

and UL1577, and supports a working voltage of up to

2 kVRMS.

The isolation barrier separates parts of the system

that operate on different common-mode voltage levels

and protects the low-side from voltage levels that can

cause electrical damage and are potentially harmful to

an operator.

The input of the AMC1400-Q1 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 control in power factor

correction (PFC) stages, DC/DC converters, traction

inverters, and other applications that must operate

at high common-mode voltages, high altitudes, or in

environments with high pollution degrees.

The AMC1400-Q1 is offered in a stretched 8-pin SOIC

package and is AEC-Q100 qualified for automotive

applications and supports the temperature range from

–40°C to +125°C.