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.

Features

• 2-V, high-impedance input voltage range optimized for isolated voltage measurement

• Low offset error and drift:

– AMC1311B: ±1.5 mV (max), ±10 µV/°C (max)

– AMC1311: ±9.9 mV (max), ±20 µV/°C (typ)

• Fixed gain: 1

• Very low gain error and drift:

– AMC1311B: ±0.2% (max), ±40 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 VDE V 0884-11: 2017-01

– 5000-VRMS isolation for 1 minute per UL1577

– CAN/CSA no. 5A-component acceptance service notice and IEC 62368-1 end equipment standard

Applications

• Isolated voltage sensing in:

– Motor drives

– Frequency inverters

– Uninterruptible power supplies

AMC1311BDWVR Simplified Schematic