AMC1311DWVR

The AMC1311 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 kVPEAK according to VDE V 0884-11 and UL1577. Used in conjunction with isolated power supplies, this isolated amplifier separates parts of the system that operate on different common-mode voltage levels and protects lower-voltage parts from damage. The high-impedance input of the AMC1311 is optimized for connection to high-voltage resistive dividers or other voltage signal sources with high output resistance. The excellent performance of the device supports accurate, low temperature drift voltage or temperature sensing and control in closedloop systems. The integrated missing high-side supply voltage detection feature simplifies systemlevel design and diagnostics. The AMC1311 is offered with two performance grade options: the AMC1311B is specified over the extended industrial temperature range of -55°C to +125°C, and the AMC1311 for operation at -40°C to +125°C.

Applications

• Isolated Voltage Sensing In:
• Motor Drives
• Frequency Inverters
• Uninterruptible Power Supplies

Key features

• 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-VPK Reinforced Isolation per DIN V VDE V 0884-11 (VDE V 0884-11): 2017-01 5000-VRMS Isolation for 1 Minute per UL1577 CAN/CSA No. 5A-Component Acceptance Service Notice, IEC 60950-1, and IEC 60065 End Equipment Standards