Texas Instruments AMC3311/AMC3311-Q1 Precision Isolated Amplifier
Texas Instruments AMC3311/AMC3311-Q1 Precision Isolated Amplifier comes 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 1200VRMS. 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 potentially harm an operator.
The input of the AMC3311/AMC3311-Q1 is optimized for direct connection to high-impedance resistive dividers typically used for sensing high voltages. The integrated isolated DC-DC converter allows the 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/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. The Texas Instruments AMC3311-Q1 devices are AEC-Q100 qualified for automotive applications.
Features
- Single-supply operation (3.3V or 5V) with integrated DC-DC converter
- Input voltage range (2V) optimized for voltage measurements with high input impedance
- 1.0 fixed gain
- Low DC errors
- Offset error: ±1mV (max.)
- Offset drift: ±10µV/°C (max.)
- Gain error: ±0.2% (max.)
- Gain drift: ±40ppm/°C (max.)
- Nonlinearity: ±0.02% (max.)
- High CMTI of 85kV/µs (min.)
- System-level diagnostic features
- Meets CISPR-11 and CISPR-25 EMI standards
- Safety-related certifications
- 6000VPK reinforced isolation per DIN EN IEC 60747-17 (VDE 0884-17)
- 4250VRMS isolation for 1 minute per UL1577
- Fully specified over the extended industrial temperature range of -40°C to +125°C
Applications
- Isolated DC voltage sensing in
- Motor drives
- Photovoltaic inverters
- Server power-supply units (PSU)
- DC charging stations
Datasheets
Functional Block Diagram
Related Developments
Texas Instruments AMC3301EVM/AMC3302EVM/AMC3330EVM EVMs
Evaluate AMC3301, ANC3302, or AMC3330, an isolated amplifier with an integrated DC/DC converter.