TI AMC3311QDWERQ1

The AMC3311-Q1 is a precision, isolated amplifier with a fully integrated, isolated DC/DC converter that allows single-supply operation from the low-side of the device. The reinforced capacitive isolation barrier is highly resistant to magnetic interference, is certified according to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577, and supports a working voltage of up to 1200 VRMS. The isolation barrier separates parts of the system that operate on different common-mode voltage levels and protects the low-voltage side from voltage levels that can cause electrical damage and are potentially harmful to an operator. The input of the AMC3311-Q1 is optimized for direct connection to high-impedance resistive dividers that are typically used for sensing high voltages. The integrated isolated DC/DC converter allows measurement of non-ground-referenced signals and makes the device a unique solution for noisy, space-constrained applications. The high DC accuracy and low temperature drift support accurate voltage monitoring and control. The AMC3311-Q1 is offered in a wide-body, 16-pin SOIC package, and is specified over the temperature range of -40°C to +125°C.

• AEC-Q100 qualified for automotive applications
• Temperature grade 1: -40°C to +125°C, TA
• Single-supply operation (3.3 V or 5 V) with integrated DC/DC converter
• Input voltage range (2 V) optimized for voltage measurements with high input impedance
• Fixed gain: 1.0
• Low DC errors: Offset error: ±1 mV (max), Offset drift: ±10 μV/°C (max), Gain error: ±0.2% (max), Gain drift: ±40 ppm/°C (max), Nonlinearity: ±0.02% (max)
• High CMTI: 85 kV/μs (min)
• System-level diagnostic features
• Meets CISPR-11 and CISPR-25 EMI standards
• Safety-related certifications: 6000-VPK reinforced isolation per DIN EN IEC 60747-17 (VDE 0884-17), 4250-VRMS isolation for 1 minute per UL1577

• Isolated voltage sensing in HEV/EV onboard chargers (OBC)
• Isolated voltage sensing in HEV/EV DC/DC converters
• Isolated voltage sensing in HEV/EV traction inverters