• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 1 answer
  • Subscribers 16 subscribers
  • Views 243 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TS5A4624: Peak on state resistance and off state isolation condition

Piyush Purohit
Intellectual 280 points
Part Number: TS5A4624

Tool/software:

Hi Team,

I want to use the mentioned SPDT for RF application as per below,

NC pin --> 1.5V 

NO pin --> 3.6V

COM pin --> VDDPA (input supply of PA)

V+ --> 3.6V

IN --> Control Pin 0V or 3.6V

On 1.5V input the maximum current is 50 mA.

On 3.6V input the maximum current is 150 mA.

So,

1. What is the peak on resistance at 150 mA with above mentioned condition?

2. Does the device support off state isolation, basically I want to switch off the supply of SPDT when it is

    not in use but the same time inputs will be there, so what will be the off state current in this scenario?

    or it is better to switch it on every time with above mentioned conditions?

3. Do I need to add any capacitor on input and output pins, what TI recommend?

Regards

Piyush

  • 0
    TI__Mastermind 35638 points

    Hi Piyush,

    1. The RON would be similar but we don't have it tested so I can't provide an exact value. In theory RON wouldn't really shift much at all but the self-heating of the device would impact the RON and would cause some increase. Hard to determine exactly what it would be though.

    2. First bullet point shows that it will isolate when the supply is off

    3. No, you don't need to put any capacitors on the input/output. It comes down to the design. As long as you can keep the voltage and current within the datasheet limits, you're good to go!

    Thanks,
    Rami

  • 0 in reply to Rami Mooti1
    Intellectual 280 points

    Hi Rami,

    Thanks for the quick response, coming to the 2 question, should I switch off the SPDT supply (V+) when not in use (while 3.6V will be available on NO pin)?

    As per data sheet there will more leakage current when V+ = 0, max up to 15 uA,

     

    So it will be better to don't cut the supply of SPDT in my opinion, please correct me here if I am wrong.

    Regards

    Piyush

  • +1 in reply to Piyush Purohit
    TI__Mastermind 35638 points

    Hi Piyush,

    Yes, you are correct. If you want to minimize leakage while having the 3.6V on the NO pin, you're better off leaving the supply on and using the control pins to turn the channel itself off 

    Thanks,
    Rami