AMC1311 - 2V Input, Reinforced Isolated Amplifier With High CMTI for Voltage Sensing

The AMC1311 is a precision, isolated amplifier with an outputseparated from the input circuitry by an isolation barrier that is highly resistant to magneticinterference. This barrier is certified to provide reinforced galvanic isolation ofup to 7 kV_PEAK according to VDE V 0884-11and UL1577. Used in conjunction with isolated power supplies, this isolated amplifier separatesparts of the system that operate on different common-mode voltage levels and protects lower-voltageparts from damage.

The high-impedance input of the AMC1311 is optimized for connectionto high-voltage resistive dividers or other voltage signal sources with high output resistance. Theexcellent performance of the device supports accurate, low temperature drift voltage or temperaturesensing and control in closed-loop systems. The integrated missing high-side supply voltagedetection feature simplifies system-level design and diagnostics.

The AMC1311 is offered with two performance gradeoptions: the AMC1311B is specified overthe extended industrial temperature range of –55°C to +125°C, and the AMC1311for operation at –40°C to +125°C.

• 2-V, High-Impedance Input Voltage Range Optimized for Isolated Voltage Measurement
• Low Offset Error and Drift:
  • AMC1311B: ±1.5 mV (max), ±15 µV/°C (max)
  • AMC1311: ±9.9 mV (max), ±20 µV/°C (typ)
• Fixed Gain: 1
• Very Low Gain Error and Drift:
  • AMC1311B: ±0.3% (max), ±45 ppm/°C (max)
  • AMC1311: ±1% (max), ±30 ppm/°C (typ)
• Low Nonlinearity and Drift: 0.01%, 1 ppm/°C (typ)
• 3.3-V Operation on High-Side (AMC1311B)
• Missing High-Side Supply Indication
• Safety-Related Certifications:
  • 7000-V_PK Reinforced Isolation per DIN V VDE V 0884-11 (VDE V 0884-11): 2017-01
  • 5000-V_RMS Isolation for 1 Minute per UL1577
  • CAN/CSA No. 5A-Component Acceptance Service Notice, IEC 60950-1, and IEC 60065 End Equipment Standards

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