CC1310: CC1310 Over Current problem

Could you show how you placed the TVS diode on the layout? 

the diode is at C17 place

Not optimal placement but should help some.

On a failing and good board, please measure the impedance from each pin to ground and list the pin(s) where you clearly have a short. 

this is the IC Impedance

I would like to note that the CC1310 still working but the RF IC part doesn't working

Did you compare with a working board? 

what pins more important ? 

For the pins where you measure below 100 kohm on the board that draws high current.  

it is look the same

can we send board for testing ?

If you have an ESD issue, you should see a difference between a "good" and "bad" device.

A question: What do you use as programmer and how do you connect to the JP1 connector? The reason I ask is that this has a different pinout from we use on this connector. 

If you have an ESD issue, you should see a difference between a "good" and "bad" device. - witch pins should shown the different 

as I said the internal MCU continue to work

JP1 is programming connector - we have an adaptor that connect between the TI programmer and the board 

I was referring to the pin impedance. What we typically see with a ESD damaged device is very low impedance to ground from either the VDDS pins or RF pins. 

I assume that you see a high current draw independent of what you are running on the MCU? 

yes we get around 400Ma when the MCU is running 

If you take a new board, connect JTAG, is the current consumption normal then? 

 Yes

but many of the board after time start to take high current

what we can do about ?

Not sure. 400 mA indicate a very low impedance between VDD and ground. But from the impedance measurements you did does not indicate that this is not in the chip. This doesn't add up. 

it is inside the IC - when we replace the IC it is goes back to normal current

is it possible that it is from the code ?

let me ask you one more question 

what is the max power on output that the IC can use continuously ?  

It's not possible to get the chip to use 400 mA writing code, this is HW malfunction due to external overvoltage. 

"what is the max power on output that the IC can use continuously ": Do you mean on  DIO? If so the DIOs are spec'ed for 4 mA/ 8 mA

1. as fare as I see the IC continue to run the code 

2. I am asking if we can transmit continuously a long time that the output power is +14dBm

waiting

" transmit continuously a long time that the output power is +14dBm": What do you define as long time here? In normal use the PA is not on continuously since you would normally send packets. Also most regulations have a duty cycle limit. 

with 400 mA current draw you have a ESD damage but the impedance numbers you have presented doesn't indicate which pin and without that information it's not possible to find out what you have to do to fix that issue.