Where can i get the spec for current when the 32khz osc is running?

[jakeboyd]

I am referring to the NHS3200 family NFC tag SoCs

[driesmoors]

Hi,

When only the 32 kHz clock is running, the IC is in Deep power-down mode. In this mode, the ARM is not active but a notion of time is kept.

The current consumption is listed in the datasheet as 3μA (Table 17. Static characteristics), but this is under the condition that the battery voltage is 3V. It decreases exponentially to 2μA when the battery voltage decreases to 2V.

Kind regards,
Dries.

[jakeboyd]

That is quite high. - most other chips are under 1uA. But hey generally use

a crystal. Is that why it is so high?

Do I buy a dev kit on your website?

Thanks

Jake

[driesmoors]

Hi,

We would like to have it seen lower, that is correct. On the other hand, we know of no competitor that accomplishes the same thing with a lower current consumption. For instance, the NHS3100 IC is a single-IC solution for temperature monitoring and logging: NFC controller, temperature sensor, FLASH and EEPROM memory, ARM processor, RTC, _all_ built-in in a single die. We woud love to hear from you if we missed an IC that beats us!

We offer several development kits, which can be bought directly from nxp.com:

• For temperature monitoring: NHS3100TEMOADK: NHS3100 Starter Kit for Temperature Monitoring|NXP    
• For therapy adherence (digital sensing): NHS3100THADADK: NHS3100 Starter Kit for Therapy Adherence|NXP 
• For therapy adherence (resistance calculation): NHS3152THADADK: Therapy Adherence NHS3152 Starter Kit|NXP 
• For supply chain monitoring: NHS3100UCODEADK - NHS3100 - UCODE-I2C|NXP    

Each kit highlights a specific use case. Check first which one matches best with your project!

Best,
Dries.

[jakeboyd]

Dries,

I am adding Kirk, the local NXP contact that I have just been introduced

to...

See below from Nordic's nRF52840 (NFC, BLE, 15.4, ARM M4, 1MB flash, 256kB

RAM, etc)...

This seems to be an order of magnitude better...

They also have smaller, lower-power processor memory options that are more

along the lines of what I need, but that is on a different power domain and

hence doesn't really impact the oscillator power anyway.

On Tue, Jan 23, 2018 at 10:52 PM, driesmoors <admin@community.nxp.com>

[driesmoors]

Hi,

Tx for that! The IC looks very capable, and indeed has very good current consumption figures in its low power state. This IC however, targets completely different markets. I'll not make an in-depth comparison here: contact me privately and Kirk and I can check with you if your use case is in the domain our NTAG SmartSensors are targeting. Our chip is a far better choice than the one you proposed for therapy delivery, item-level temperature monitoring and supply chain control, and more. But you must choose the chip that's best for you.

Kind regards,
Dries.

[jakeboyd]

Sorry - NHS3100 series