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AMC1311 Precision Isolated Amplifiers

Texas Instruments' AMC1311 precision reinforced isolated amplifiers are for voltage sensing

Image of Texas Instruments' AMC1311 Precision Isolated AmplifiersTexas Instruments' AMC1311 device is a precision, isolated amplifier with an output separated from the input circuitry by an isolation barrier that is highly resistant to magnetic interference. This barrier is certified to provide reinforced galvanic isolation of up to 7 kVPEAK according to VDE V 0884-11 and UL1577. Used in conjunction with isolated power supplies, this isolated amplifier separates parts of the system that operate on different common-mode voltage levels and protects lower-voltage parts from damage.

The high-impedance input of the AMC1311 is optimized for connection to high-voltage resistive dividers or other voltage signal sources with high output resistance. The excellent performance of the device supports accurate, low temperature drift voltage or temperature sensing and control in closed-loop systems. The integrated missing high-side supply voltage detection feature simplifies system-level design and diagnostics.

The AMC1311 is offered with two performance grade options: the AMC1311B is specified over the extended industrial temperature range of -55°C to +125°C, and the AMC1311 for operation at -40°C to +125°C.

Features
  • 2 V, high-impedance input voltage range optimized for isolated voltage measurement
  • Low offset error and drift:
    • AMC1311B: ±1.5 mV (max.), ±15 µV/°C (max.)
    • AMC1311: ±9.9 mV (max.), ±20 µV/°C (typ.)
  • Fixed gain: 1
  • Very low gain error and drift:
    • AMC1311B: ±0.3% (max.), ±45 ppm/°C (max.)
    • AMC1311: ±1% (max), ±30 ppm/°C (typ.)
  • Low nonlinearity and drift: 0.01%, 1 ppm/°C (typ.)

Applications

  • Isolated voltage sensing in:
    • Motor drives
    • Frequency inverters
    • Uninterruptible power supplies
  • 3.3 V operation on high-side (AMC1311B)
  • Missing high-side supply indication
  • Safety-related certifications:
    • 7000 VPK reinforced isolation per DIN V VDE V 0884-11 (VDE V 0884-11): 2017-01
    • 5000 VRMS isolation for 1 minute per UL1577
    • CAN/CSA No. 5A-Component Acceptance Service Notice, IEC 60950-1, and IEC 60065 End Equipment Standards

AMC1311 Precision Isolated Amplifiers

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC ISOLATION 8SOICAMC1311DWVIC ISOLATION 8SOIC310 - Immediate
8640 - Factory Stock
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IC ISOLATION 8SOICAMC1311BDWVIC ISOLATION 8SOIC1786 - Immediate
9984 - Factory Stock
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Evaluation Board

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
EVAL BOARD FOR AMC1311AMC1311EVMEVAL BOARD FOR AMC13111 - Immediate
104 - Factory Stock
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Published: 2018-02-27