Texas Instruments AMC1303x High-Precision Delta-Sigma Modulators

Texas Instruments AMC1303x High-Precision Delta-Sigma Modulators have the output separated from the input circuitry by a capacitive double isolation barrier that is highly resistant to magnetic interference. This barrier is certified to provide reinforced isolation of up to 7000VPK according to the DIN V VDE V 0884-11 and UL1577 standards. Used in conjunction with isolated power supplies, this isolated modulator separates parts of the system that operate on different common-mode voltage levels and protects lower-voltage parts from damage. The input of the AMC1303x is optimized for direct connection to shunt resistors or other low voltage-level signal sources. The ±50mV input voltage range option significantly reduces the power dissipation through the shunt. The output bit-stream of the AMC1303x is synchronized to the internally generated clock and is Manchester coded (AMC1303Ex) or uncoded (AMC1303Mx).


  • Pin-compatible family optimized for shunt-resistor-based current measurements
    • ±50mV or ±250mV Input voltage ranges
    • Manchester coded or uncoded bitstream options
    • 10MHz and 20MHz Clock options
  • Excellent DC performance
    • ±50µV or ±100µV (max) Offset error
    • ±1µV/°C (max) Offset drift
    • ±0.2% (max) Gain error
    • ±40ppm/°C (max) Gain drift
  • 100kV/µs (typ) Transient immunity
  • System-level diagnostic features
  • Safety-related certifications
    • 7000VPK Reinforced isolation per DIN V VDE V 0884-11 (VDE V 0884-11): 2017-01
    • 5000VRMS Isolation for 1 minute per UL1577
    • CAN/CSA No. 5A-Component acceptance service notice, IEC 60950-1, and IEC 60065 end equipment standards
  • –40°C to +125°C Fully specified over the extended industrial temperature range


  • Shunt-resistor-based current sensing and isolated voltage measurement in
    • Industrial motor drives
    • Photovoltaic inverters
    • Uninterruptible and isolated power supplies
    • Power factor correction circuits
Published: 2017-09-11 | Updated: 2022-06-02