TI AMC1311BDWVR

The AMC1311 is an isolated precision amplifier. The output and input circuits of the amplifier are separated by a capacitive isolation layer with extremely strong anti-electromagnetic interference performance. This isolation barrier is certified to provide enhanced electrical isolation of up to 5 kVRMS, compliant with DIN EN IEC 60747-17 (VDE 0884-17) and UL1577 standards, and can support an operating voltage of up to 1500 VRMS. This isolation layer can separate devices operating at different common-mode voltage levels in the system, preventing electrical damage to low-voltage side devices or harm to operators caused by high-voltage surges.

The high-impedance input of the AMC1311 is optimized for connection with high-impedance resistive voltage dividers or any other high-impedance voltage signal sources. Excellent DC accuracy and low temperature drift support accurate isolated voltage detection and control in closed-loop systems. The integrated high-side power supply voltage loss detection function simplifies system-level design and diagnosis.

The AMC1311 offers two performance level options: The AMC1311B has a rated industrial operating temperature range of –55°C to +125°C, while the AMC1311 has a range of –40°C to +125°C.

• 2V high-impedance input voltage range optimized for isolated voltage measurement
• Fixed gain: 1
• Low DC error:
  • AMC1311:
    • Offset voltage error: ±9.9mV (max), drift ±20μV/°C (typ)
    • Gain error: ±1% (max)
    • Gain drift: ±30ppm/°C (typ)
  • AMC1311B:
    • Offset voltage error: ±1.5mV (max), drift ±10μV/°C (max)
    • Gain error: ±0.2% (max)
    • Gain drift: ±40ppm/°C (max)
• Nonlinearity: 0.04% (max)
• High-side 3.3V supply voltage (AMC1311B)
• High CMTI: 100kV/µs (min) (AMC1311B)
• High-side power missing indicator
• Safety-related certifications:
  • 7000VPK reinforced isolation per DIN EN IEC 60747-17 (VDE 0884-17)
  • 5000VRMS isolation for 1 minute per UL1577
  • Fully optimized for extended industrial temperature range: –40°C to +125°C

• Can be used for isolated voltage sensing