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  • TI Thinks Resolved

TS5A3153: Reference control signal to 1.8V with a 1.8V power supply

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Part Number: TS5A3153

Team,

 

1. Do you confirm TS5A3153 can differentiate three states, i.e. NC, NO and Tri-state when the device is powered-up?
2. Do you confirm that when the switch in not powered-up COM pin is in High Impedance state?
3. When power supply is 1.8V do you see any issues in driving the switch with signals referred to 1.8V?

Please let me know

Thanks

 

  • 1. Yes, these are the three states shown in table on p. 2 of the datasheet.

    2. The chip has ESD protection diodes from the VCOM pin to V+. So when V+ = 0 V, there is a low-impedance connection from the pin to GND. (The absolute maximum ratings forbid voltages above V+ + 0.5 V.)

    3. The analog signal range is from 0 to V+, at all supply voltages.

  • Hi Bo345,

    1. Yes it has all three states. The truth table is on pg. 2 as Clemens mentioned.

    2. There is a mistake in the abs max section of this datasheet. This device has powered off protection and will be Hi-Z when V+ = 0V. For 1.8V please see below for leakage currents during power off mode:

    3. No the switch can pass rail to rail signals, so there should be no issue. The Ron  is not flat at 1.8V so if the load resistance is smaller relative to the Ron you may have a variance of insertion loss. Please see figure below:

    If you have any other questions/concerns/comments please let me know!


    Best,

    Parker Dodson

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