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The AMC1311-Q1 is a precision, isolated amplifier 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 5 kVRMS according to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577 and supports a working voltage of up to 1500 VRMS.

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 be harmful to an operator.

The high-impedance input of the AMC1311-Q1 is optimized for connection to high-impedance resistive dividers or any other high-impedance voltage signal source. The excellent DC accuracy and low temperature drift support accurate, isolated voltage sensing and control in closed-loop systems. The integrated missing high-side supply voltage detection feature simplifies system-level design and diagnostics.

The AMC1311-Q1 is offered with two performance grade options: AMC1311-Q1 and AMC1311B-Q1.

• 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
• 2-V, high-impedance input voltage range optimized for isolated voltage measurement
• Fixed gain: 1
• Low DC errors:
  • AMC1311-Q1:
    • Offset error: ±9.9 mV (maximum)
    • Offset drift: ±20 µV/°C (typical)
    • Gain error: ±1% (maximum)
    • Gain drift: ±30 ppm/°C (typical)
  • AMC1311B-Q1:
    • Offset error: ±1.5 mV (maximum)
    • Offset drift: ±10 µV/°C (maximum)
    • Gain error: ±0.2% (maximum)
    • Gain drift: ±40 ppm/°C (maximum)
  • Nonlinearity: 0.04% (maximum)
• 3.3-V operation on high-side ( AMC1311B-Q1)
• High CMTI: 100 kV/µs ( AMC1311B-Q1)
• Missing high-side supply indication
• Safety-related certifications:
  • 7000-VPK reinforced isolation per DIN EN IEC 60747-17 (VDE 0884-17)
  • 5000-VRMS isolation for 1 minute per UL1577