Texas Instruments AMC1411/AMC1411-Q1 Reinforced Isolated Amplifiers

Texas Instruments AMC1411/AMC1411-Q1 High-Impedance Reinforced Isolated Amplifiers come with an output separated from the input circuitry by a capacitive isolation barrier that is highly resistant to magnetic interference. This barrier is certified to provide reinforced galvanic isolation of up to 7.5kVRMS according to VDE V 0884-11 and UL1577. The devices support a working voltage of up to 1600VRMS. The isolation barrier separates parts of the system that operate on different common-mode voltage levels and protects the low-voltage side from voltages that can cause electrical damage or harm to an operator.

The high-impedance input of the AMC1411/AMC1411-Q1 is optimized for connection to high-impedance resistive dividers or other high-impedance voltage signal sources. The excellent DC accuracy and low temperature-drift support accurate, isolated voltage sensing in onboard chargers (OBC), DC/DC converters, traction inverters, or other applications that must operate at high common-mode voltages, high altitudes, or in environments with high pollution degrees.

The AMC1411/AMC1411-Q1 is offered in a stretched 8-pin SOIC package and supports the temperature range from –40°C to +125°C. The AMC1411-Q1 is AEC-Q100 qualified for automotive applications.

Features

  • AEC-Q100 qualified for automotive applications
    • –40°C to +125°C, TA temperature grade 1
  • Functional Safety-Capable
    • Documentation available to aid functional safety system design
  • 2V, high-impedance input voltage range optimized for isolated voltage measurements
  • 1.0V/V fixed gain
  • Low DC errors
    • Offset error ±1.5mV (max)
    • Offset drift: ±10µV/°C (max)
    • Gain error: ±0.2% (max)
    • Gain drift: ±30ppm/°C (max)
    • Nonlinearity 0.04% (max)
  • 3.3V or 5V operation on high-side and low-side
  • Missing high-side supply detection feature
  • 100kV/µs (min) high CMTI
  • ≥15.7mm creepage, stretched SOIC package
  • Reinforced isolation
    • 10600VPK reinforced isolation per DIN VDE V 0884-11: 2017-01
    • 7500VRMS isolation for 1 minute per UL1577

Applications

  • Isolated voltage sensing in
    • Traction inverters
    • Onboard chargers
    • DC/DC converters
    • HEV/EV DC charger

AMC1411-Q1 Functional Block Diagram

Block Diagram - Texas Instruments AMC1411/AMC1411-Q1 Reinforced Isolated Amplifiers

AMC1411 Typical Aplication

Texas Instruments AMC1411/AMC1411-Q1 Reinforced Isolated Amplifiers

Texas Instruments AMC1411/AMC1411-Q1 Reinforced Isolated Amplifiers