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MAX44211 Line Driver

Maxim's MAX44211 is a low-distortion line driver customized for powerline communication (PLC) applications where high output current is needed to drive the isolation and coupling transformer under varying load conditions.


Maxim's MAX44211 is a low-distortion line driver customized for powerline communication (PLC) applications where high output current is needed to drive the isolation and coupling transformer under varying load conditions. It can be switched to implement all world standards, trading off improved linearity for increased quiescent current. The MAX44211 delivers a high 1.5 A linear output current and provides peak-to-peak differential voltage swing of up to 36 V. It also features very low intermodulation and harmonic distortion ensuring they meet worldwide PLC standards.

The MAX44211 line driver features advanced diagnostics for temperature and output current monitoring. There are high temperature warning and over temperature shutdown functions. There is also a programmable current limit. The statuses of these diagnostics are indicated via two open-drain status outputs.

The device is designed to interface to powerlines that have wide ranging and variable loads and drive signals within the 9 kHz to 500 kHz frequency band. It operates from a single supply and is available in a 4 mm x 4 mm, 20-pin TQFN package.

Features

  • Meets stringent ARIB, FCC, and CENELEC linearity specifications for out-of-band emissions
    • Output drives current linearly up to 1.5 A peak into a reactive load for PLC applications
  • Output voltage swings to within 0.5 V of AVDD or AGND (36 VP-P differential) for widest dynamic range
  • Wide power-supply range addresses multiple standards:
    • +8 V to +20 V for analog supply
    • +2.7 V to +5.5 V for digital supply
  • Programmable output current limit via external resistor provides flexibility
  • Programmable gain (6x, 12x, 15x, or 18x) via gain inputs provides multi-standard usage
  • Status logic outputs provide improved diagnostics
    • Overtemperature shutdown active
    • High-temperature warning active
    • Overcurrent active
    • Normal operation

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