AMC1302 - Precision reinforced isolated amplifier with ±50mV input and high CMTI

The AMC1302 is aprecision isolated amplifier with a capacitive isolation barrier that has high immunity to magneticinterference. This barrier provides reinforced isolation of 5 kV_RMS(maximum) with a very long lifetime and low power dissipation. When used with isolated powersupplies, this device isolates components that operate on different common-mode voltage levels.Furthermore, the AMC1302 alsoprotects lower-voltage devices from damage.

The input of the AMC1302 is optimized for direct connection to shunt resistors or otherlow voltage-level signal sources. The ±50-mV input voltage range allows significant reduction ofthe power dissipation through the shunt. Additionally, the low high-side supply current and voltageof the AMC1302 allow use oflow-cost isolated power-supply solutions. The performance of the device supports accurate currentcontrol resulting in system-level power savings and in low torque ripple that is particularlyimportant in motor control applications. The integrated input common-mode overvoltage and missinghigh-side supply voltage detection features of the AMC1302 simplify system-level diagnostics.

• ±50-mV Input Voltage Range for Low Dissipation, Shunt-Resistor-Based Current Measurement
• Fixed Gain With Low Drift: 41 ± 0.3%, ±50 ppm/°C
• Low Input Offset and Drift: ±100 µV, ±0.8 µV/°C
• Low Nonlinearity and Drift: ±0.03%, ±1 ppm/°C
• Very Low Isolated High-Side Power Dissipation When Operated From a 3.3-V Supply
• System-Level Diagnostic Features
• Safety-Related Certifications:
  • 7071-V_PK Reinforced Isolation per DIN V VDE V 0884-11 (VDE V 0884-11): 2017-01
  • 5000-V_RMS Isolation for 1 Minute per UL1577
• Extended Industrial Temperature Range:
  –55°C to +125°C
• High CMTI: 80 kV/µs (typ), 55 kV/µs (min)

All trademarks are the property of their respective owners.