TI AMC3302DWER

The AMC3302 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 low-voltage devices from high-voltage surges. The input of the AMC3302 is optimized for direct connection to a low-impedance shunt resistor or another low-impedance voltage source with a low signal level. Excellent DC accuracy and low temperature drift support accurate current measurement over an extended industrial temperature range of –40°C to +125°C. The integrated DC/DC converter fault detection and diagnostic output pins of the AMC3302 simplify system-level design and diagnostics.

• 3.3V or 5V single supply with integrated DC/DC converter, ±50mV input voltage range, optimized for current measurement using shunt resistors
• Fixed gain: 41
• Low DC error:
  • Offset voltage: ±50μV (max)
  • Temperature drift: ±0.5μV/°C (max)
  • Gain error: ±0.2% (max)
  • Gain error drift: ±35ppm/°C (max)
  • Nonlinearity: ±0.03% (max)
• High CMTI: 95kV/μs (min)
• System-level diagnostic features
• CISPR-11 and CISPR-25 EMI compliant
• 6000V1PK reinforced isolation per DIN VDE V 0884-11
• 4250VRMS isolation for 1 minute per UL1577
• Safety-related certifications
• Industrial operating temperature range: -40°C to +125°C

• Protection relays
• Motor drivers
• Power supplies
• Photovoltaic inverters