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TMUX1119: Looking for a Switch to switch the Analog channel(EMG signal) to power charging path(5V, @600mA)

Vinay Varikooti
Prodigy 60 points
Part Number: TMUX1119
Other Parts Discussed in Thread: TMUX2889

Hello,

We are looking for a SPDT switch which enable Analog EMG path to battery Charging path (5V, 600mA) in a wearable device.

Looking for a SPDT switch IC, which needs to meet the below design requirements.

1)Low ON, OFF parasitics capacitance = <10pF

2)Peak ON current =>600mA

We are looking for both requirements in single Switch IC which supports to my design. 

TMUX119, not meeting the design requirements so it is having very low peak current.

So suggest me SPDT Switch IC or better solution to switch between EMG path to charging path with low PCB room.

Thanks in Advance..

Regards,

Vinay V

  • 0
    TI__Mastermind 32883 points

    Hey Vinay,

    Unfortunately we won't have anything that can support the <10pF requirement while also meeting the 600mA peak current. it may be a hard requirement to find anywhere just do to the physically limitations. Typically a lower capacitance will mean a smaller conductor size which means higher resistance, which leads to the device not being able to handle as much current before frying up. 
    Is the 10pF a must? Or do you need to just be able to support EMG signals? Those are typically lower frequencies (<1MHz) so something like the TMUX2889 could support the frequency and current needed. If the 10pF is a must we won't be able support currently.

    Thanks,
    Rami