ultra low power implantable, reduced range

[jfd710]

Hi,

I am investigating an alternative to an implantable device that currently uses NFC.

The device range would only be about 3m and the data would only be transmitted for a few minutes each day.  The big requirement is that the device needs to work for about 10 years with an average current consumption of about 2uA.

So

1) I was wondering if you had any recommendations as to a device that might be a good starting point.

2) A lot of these devices have theoretical ranges much greater than I need so are some of the transmit/receive parameters scalable?  For instance the nRF24 has the following specs.

          

• 900nA deep sleep mode
• 11.3mA Radio TX at 0dBm
• 13.3mA Radio RX at 2Mbps on-air data-rate

Is it possible to reduce the transmit power, and if so, by how much and how much lower would the current draw be?

Can the receive power requirements be reduced as well?

thank you

[bjorn-spockeli]

If you're looking for a small SoC for a medical device then I would recommend looking at the nRF52810 SoC, here is the link to the Product Specification. 

The sleep current of the nRF52810 is very low, only 1.5uA when the RTC is waking up the chip at a periodic interval( configurable). Current consumption for other sleep configurations can be found here. 

In terms of the transmit and receive paramenters, transmitting @ -40 dBm output power will give you a typical current consumption of 3.4mA.

You can see a list of the Radio TX/RX current consumption in various configurations on this Infocenter page