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Overview

The NMF3000 and the NMF3010 are a dual-stage, differential line ESD and filtering protection scheme for input signals into portable devices. The NMF3000 is the first stage and is located at or very near to the inteface to the outside world. It provides the high-level ESD protection as well as the initial filtering of incoming audio signals. The NMF3010 is the second stage and provides additional signal filtering. This second stage can be placed some distance away from the first stage to allow for effective filtering across extended distances.

  • Dual Filtering Lines for 2-Channels or Differential Transmission
  • Separate Power and Analog Grounds for ESD Protection and Filtering Circuitry
  • VCC Unput Pin on First Stage to set Microphone DC Bias
  • IEC 61000-4-2 Grade ±15 kV Contact ESD Protection on the Inputs, VCC, and between Power and Analog Grounds
  • IEC 61000-4-2 Level 1 ESD protection on all other pin-to-pin combinations.

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