TI AMC3301QDWERQ1

The AMC3301-Q1 is a precision isolated amplifier optimized for shunt-based current measurement. This fully integrated isolated DC/DC converter enables single-supply operation on the low side of the device, making it a unique solution for space-constrained applications. The enhanced capacitive isolation barrier is certified to VDE V 0884-11 and UL1577 and supports an operating voltage of up to 1.2 kVRMS. This isolation barrier can separate devices operating at different common-mode voltage levels in the system and protect devices with lower voltages from high-voltage surges. The input of the AMC3301-Q1 is optimized for direct connection to low-impedance shunt resistors or other low-impedance voltage sources with low signal levels. Excellent DC accuracy and low temperature drift support accurate current measurement over a temperature range of -40°C to +125°C. The integrated DC/DC converter fault detection and diagnostic output pins of the AMC3301-Q1 simplify system-level design and diagnostics.

• AEC-Q100 qualified for automotive applications: Temperature Grade 1: –40°C to 125°C, TA
• 3.3V or 5V single supply with integrated DC/DC converter
• ±250mV input voltage range, optimized for current measurement using shunt resistors
• Fixed gain: 8.2
• Low DC error:
  • Offset voltage: ±150μV (maximum)
  • Temperature drift: ±1µV/°C (maximum)
  • Gain error: ±0.2% (maximum)
  • Gain error drift: ±40ppm/°C (maximum)
  • Nonlinearity: ±0.04% (maximum)
• High CMTI: 85kV/µs (minimum)
• System-level diagnostic features
• CISPR-11 and CISPR-25 EMI compliant
• Safety-related certifications:
  • 6000VPK reinforced isolation per DIN VDE V 0884-11
  • 4250VRMS isolation for 1 minute per UL1577

• Shunt-based isolated current sensing for:
  • HEV/EV charging stations
  • HEV/EV on-board chargers (OBC)
  • HEV/EV DC/DC converters
  • HEV/EV traction inverters