AMC1301 - Precision Reinforced Isolated Amplifier for Current Sensing

The AMC1301 device is a precision, isolated amplifier with anoutput separated from the input circuitry by an isolation barrier that is highly resistant tomagnetic interference. This barrier is certified to provide reinforced galvanic isolation of up to7 kV_PEAK according to VDE V 0884-10 and UL1577. Used in conjunction withisolated power supplies, this device prevents noise currents on a high common-mode voltage linefrom entering the local ground and interfering with or damaging sensitive circuitry.

The input of the AMC1301 is optimized for direct connection to shuntresistors or other low voltage-level signal sources. The excellent performance of the devicesupports accurate current control resulting in system-level power savings and, especially in motorcontrol applications, lower torque ripple. The integrated common-mode overvoltage and missinghigh-side supply voltage detection features of the AMC1301 simplifysystem-level design and diagnostics.

The AMC1301 is fully specified over the extendedindustrial temperature range of –40°C to +125°C and is available in a wide-body 8-pin SOIC (DWV)package. The AMC1301S is specified over the temperature range of –55°C to +125°C.

• ±250-mV Input Voltage Range Optimized for Current Measurement Using Shunt Resistors
• Low Offset Error and Drift:
  ±200 µV at 25°C, ± 3 µV/°C
• Fixed Gain: 8.2
• Very Low Gain Error and Drift:
  ±0.3% at 25°C, ± 50 ppm/°C
• Very Low Nonlinearity and Drift:
  0.03%, 1 ppm/°C
• 3.3-V Operation on High-Side and Low-Side
• System-Level Diagnostic Features
• Safety-Related Certifications:
  • 7000-V_PK Reinforced Isolation per
    DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12
  • 5000-V_RMS Isolation for 1 Minute per UL1577
  • CAN/CSA No. 5A-Component Acceptance Service Notice,
    IEC 60950-1, and IEC 60065 End Equipment Standards
• Fully Specified Over the Extended Industrial Temperature Range

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