1 Features
• ±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-32
standards
• ≥15.7-mm creepage, stretched SOIC package
• Safety-related certifications:
– 10600-VPK reinforced isolation per DIN EN IEC
60747-17 (VDE 0884-17)
– 7500-VRMS isolation for 1 minute per UL1577
• Fully specified over the extended industrial
temperature range: –40°C to +125°C

2 Applications
• Shunt-resistor-based current sensing in:
– Motor drives
– Frequency inverters
– Solar inverters
– Wind turbine inverters
– Rail transport systems

3 Description
The AMC1400 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 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 DC/DC
converters, frequency inverters, AC motor drives, and
other applications that must operate at high voltages,
high altitudes, or in environments with high pollution
degrees.
The AMC1400 is offered in a stretched SOIC
package and is specified over the extended industrial
temperature range from –40°C to +125°C .