Data Sheet

NINA-B41-data sheet
2Interfaces
2.1Power management
2.1.1Module supply input (VCC)
NINA-B41 series modules use integrated step-down converters to transform the supply voltage
presented at the VCC pin into a stable system voltage. Consequently, the modules are compatible
for use in battery powered designs – without the need of an additional voltage converter.
The modules support two on-board converters:
• Low-dropout (LDO)
• DC/DC buck
The module automatically switches between these converters to suit the prevailing current
consumption. The DC/DC converter is more efficient under high loads when the radio is active, while
the LDO converter is better suited for power saving modes.
2.1.2Digital I/O interfaces reference voltage (VCC_IO)
All modules in the u-blox NINA series provide an additional voltage supply input for setting the I/O
voltage level. In NINA-B41 series modules, the I/O voltage level is similar to the supply voltage and
VCC_IO is internally connected to the supply input. Therefore, only a single supply voltage is needed
for NINA-B41, which makes it ideal for battery powered designs.
Note Other modules in the NINA series can require more than a single supply voltage. For a pin
design that is compatible with other NINA-series modules the VCC and VCC_IO supply rails
must be kept separate.
2.2RF antenna interfaces
2.2.12.4 GHz radio (ANT)
The NINA-B41 model versions have their own 2.4 GHz antenna solutions respectively:
• NINA-B410 modules use an U.FL connector solution for external antenna. The ANT pin is
internally disconnected on these models.
• NINA-B416 modules use an internal PCB trace antenna integrated into the module PCB. This
low profile antenna solution is useful in space constrained designs. The ANT pin is internally
disconnected on these models. This solution uses antenna technology licensed from Proant
AB.
Note See the NINA-B4 system integration manual [3] for antenna reference designs and
integration instructions.
2.2.2Near Field Communication (NFC)
NINA-B41 series modules include a Near Field Communication interface that can operate as a
13.56MHz NFC tag at a bit rate of 106 kbps.
As an NFC tag, data can be read from or written to NINA-B41 modules using an NFC reader. NINA-
B41 modules are not capable of reading other tags or initiating NFC communications.
UBX-20035327 - R01
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2Interfaces Page 7 of 34
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