AMC1311

AMC1311 SBAS786C – DECEMBER 2017 – REVISED JUNE 2022 AMC1311x High-Impedance, 2-V Input, Reinforced Isolated Amplifiers 1 Features 2-V, high-impedance input voltage range optimized for isolated voltage measurement Fixed gain: 1 Low DC errors: – AMC1311: Offset error: ±9.9 mV (maximum) Offset drift: ±20 μV/°C (typical) Gain error: ±1% (maximum) Gain drift: ±30 ppm/°C (typical) – AMC1311B: 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) High CMTI: 100 kV/μs (minimum) (AMC1311B) 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 – Fully specified over the extended industrial temperature range: –40°C to +125°C 2 Applications Isolated voltage sensing in: – Motor drives – Frequency inverters – Uninterruptible power supplies 3 Description The AMC1311 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 ...