In modern day hearing aids, multiplexers are used to select the audio signal either from omnidirectional or directional microphones to suppress ambient noise and provide a clear audio signal to the user. Since the audio signals need to be multiplexed before pre-amplification to provide the best noise filtering, select a multiplexer with minimal ON resistance and low total harmonic distortion (THD). Moreover, hearing aids are battery powered portable devices, so the design must be as compact and power efficient as possible.
Device | Configuration | I/O Voltage | Supply Voltage | R-ON | C-ON/OFF | Leakage Current | THD |
---|---|---|---|---|---|---|---|
TMUX4827 | 2:1 x 2 | -12V to +12V | 1.8V to 5.5V | 0.13Ω | 40/70pF | 20nA | 0.0008% |
TMUX2889 | 2:1 x 2 | -5.5V to +5.5V | 1.8V to 5.5V | 0.15Ω | 40/70pF | 20nA | 0.0008% |
TS5A12301E | 2:1 x 1 | 0V to 5.5V | 2.25V to 5.5V | 0.5Ω | 112/28pF | 2nA | 0.003% |
TS5A3159 | 2:1 x 1 | 0V to 5.5V | 1.65V to 5.5V | 0.75Ω | 84/23pF | 2.8nA | 0.015% |
For more devices, browse through the online parametric tool where you can sort by desired voltage, channel numbers, on-state resistance, and other features.
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