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ICS-40720 Datasheet(PDF) 8 Page - List of Unclassifed Manufacturers |
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ICS-40720 Datasheet(HTML) 8 Page - List of Unclassifed Manufacturers |
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8 / 16 page ![]() ICS‐40720 Page 8 of 16 Document Number: DS‐000045 Revision: 1.3 THEORY OF OPERATION BALANCED OUTPUT The ICS‐40720 has a balanced differential output with 700 Ω output impedance. This configuration is compatible with a fully‐ differential codec input and provides the benefits of a balanced signal between the microphone and codec. A balanced analog audio signal provides rejection of common‐mode noise that is present on both the positive and negative signals. SINGLE‐ENDED OPERATION The ICS‐40720 can be used as a single‐ended microphone by using the signal from only one of the two output pins. In this configuration, the sensitivity will be 6 dB lower than the differential output, but with the same high SNR performance. Pin OUTPUT+ will output the non‐inverted signal, relative to the acoustic input, while the OUTPUT− pin will output an inverted signal. The unused output pin should be left disconnected when the mic is used in single‐ended mode; do not connect the unused pin to ground. |
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