The AMC1311BDWVR is a high-performance, high-impedance isolated amplifier designed for accurate isolated voltage sensing in industrial and power electronics applications. With a 2V input voltage range, fixed gain of 1, and industry-leading galvanic isolation, this device is optimized for use in motor drives, frequency inverters, and UPS systems where safety, precision, and noise immunity are critical.

The device provides reinforced isolation up to 5000 VRMS per UL1577 and 7000 VPK per DIN EN IEC 60747-17 (VDE 0884-17), ensuring safe operation across high-voltage domains. It features low DC errors, excellent gain and offset stability, high CMTI (≥100 kV/μs for AMC1311B), and built-in missing high-side supply detection for enhanced system diagnostics.

Its capacitive isolation barrier is highly resistant to magnetic interference, offering reliable performance even in electrically noisy environments. With low offset drift and high accuracy, the AMC1311BDWVR enables precise closed-loop control in demanding applications.

Features:

• 2V high-impedance input range optimized for isolated voltage measurement

• Fixed gain = 1 for direct sensing applications

• Ultra-low offset and gain error:

  • Offset error: ±1.5 mV (max, AMC1311B)

  • Gain error: ±0.2% (max, AMC1311B)

• Excellent drift performance:

  • Offset drift: ±10 µV/°C (max)

  • Gain drift: ±40 ppm/°C (typical)

• High isolation ratings:

  • 7000 VPK reinforced isolation per VDE 0884-17

  • 5000 VRMS per UL1577 for 1 minute

• Common Mode Transient Immunity (CMTI): ≥100 kV/µs (AMC1311B)

• Built-in missing high-side supply detection

• Wide operating temperature range: –40°C to +125°C (AMC1311), –55°C to +125°C (AMC1311B)

• Low nonlinearity: 0.04% max

• SOIC-8 package, compact footprint

Specifications:

• Part Number: AMC1311BDWVR

• Device Type: Reinforced Isolated Precision Amplifier

• Input Voltage Range: 2V high impedance

• Gain: Fixed, 1 V/V

• Offset Error: ±1.5 mV max (AMC1311B)

• Gain Error: ±0.2% max (AMC1311B)

• Isolation Rating: 5000 VRMS (UL1577), 7000 VPK (VDE 0884-17)

• CMTI: ≥100 kV/µs (AMC1311B)

• Operating Voltage (High-Side): 3.3V

• Temperature Range: –40°C to +125°C (AMC1311), –55°C to +125°C (AMC1311B)

• Nonlinearity: 0.04% max

• Package: SOIC-8 (5.85 mm × 7.50 mm)

• Applications: Motor drives, frequency inverters, UPS, industrial power control, isolated voltage sensing, precision feedback systems

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