TI AMC1400DWLR

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.

• ±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

• Shunt-resistor-based current sensing in motor drives
• Shunt-resistor-based current sensing in frequency inverters
• Shunt-resistor-based current sensing in solar inverters
• Shunt-resistor-based current sensing in wind turbine inverters
• Shunt-resistor-based current sensing in rail transport systems