nRF54L15 BLE Current Consumption

[Webster Yang]

Hi Nordic Teams :

I would like to check the current consumption by BLE DTM.

1. Is the table measurement is from 3.0V input?

2. I find the condition in the datasheet is 3.0V but my system is 1.8V. Is the current still the same as the table or I need to transfer the current by system power consumption 3(V)x9.8(mA) / 1.8(V) = 16.3(mA) ? (take +8dBm for example)

[ketiljo]

1. Is the table measurement is from 3.0V input?

The table is for 3.0 V.

2. I find the condition in the datasheet is 3.0V but my system is 1.8V. Is the current still the same as the table or I need to transfer the current by system power consumption 3(V)x9.8(mA) / 1.8(V) = 16.3(mA) ? (take +8dBm for example)

The power supply to the radio is a DCDC converter. The efficiency varies across supply voltage and it's typically less effective at lower input voltage. 16 mA at 8 dBm on 1.8 V should be close to what you can measure

[Webster Yang]

I measure the DK supplies 1.8V to nRF54L15 and the current is around 13.7mA in DTM mode. This value is different from the calculation above. I just want to clarify whether the calculation idea is correct or not? I series the ampere meter in p6 pin header and I think I connect the correct way.

[ketiljo]

If the PA isn't continuously on, you will measure less current. Setup a constant carrier in DTM for 100% duty cycle.