AMC1200-Q1 - Automotive, 4kV (Peak) Isolated Amplifier for Current Shunt Measurements

The AMC1200-Q1 is a precision isolation amplifier with the output separated from the input circuitry by a silicon dioxide (SiO₂) barrier that is highly resistant to magnetic interference. This barrier is certified to provide galvanic isolation of up to 4250 V_PEAK according to UL1577 and VDE V 0884-10. Used in conjunction with isolated power supplies, this device prevents noise currents on a high common-mode voltage line from entering the local ground and interfering with or damaging sensitive circuitry.

The input of the AMC1200-Q1 is optimized for direct connection to shunt resistors or other low-voltage level signal sources. The performance of the device supports accurate current control, resulting in systemlevel power saving and (especially in motor-control applications) lower torque ripple. The common-mode voltage of the output signal is automatically adjusted to either the 3-V or 5-V low-side supply.

The AMC1200-Q1 is available in a wide-body, 8-pin SOIC package (DWV) and a gullwing, 8-pin SOP package (DUB).

• Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
  • Temperature Grade 2: –40°C to 105°C
  • HBM ESD Classification Level H2
  • CDM ESD Classification Level C3B
• ±250-mV Input Voltage Range Optimized for
  Shunt Resistors
• Very Low Nonlinearity: 0.075% (max)
  with 5-V High-Side Supply
• Low Offset Error: 1.5 mV (max)
• Low Noise: 3.1 m_VRMS (typical)
• Low High-Side Supply Current:
  8 mA (max) at 5 V
• Input Bandwidth: 60 kHz (min)
• Fixed Gain: 8 (0.5% accuracy)
• High Common-Mode Rejection Ratio:
  108 dB (typical)
• 3.3-V Operation on Low-Side
• Certified Galvanic Isolation:
  • UL1577 and VDE V 0884-10 Approved
  • Isolation Voltage: 4250 VPEAK
  • Working Voltage: 1200 VPEAK
  • Transient Immunity: 10 kV/\xECs (min)
• Typical 10-Year Lifespan at Rated Working
  Voltage (see Application Report, SLLA197