Data Sheet

NINA-B40 series - Data sheet
UBX-19049405 - R04 Electrical specifications Page 23 of 40
C1 - Public
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4.2.5 32.768 kHz crystal (LFXO)
Symbol Parameter Typ. Max. Unit
F
NOM_LFXO
Crystal frequency 32.768 - kHz
F
TOL_LFXO_BLE
Frequency tolerance, Bluetooth low energy applications
3
- ±500 ppm
f
TOL_LFXO_ANT
Frequency Tolerance, ANT applications
4
- ±50 ppm
C
L_LFXO
Load Capacitance - 12.5 pF
C
0_LFXO
Shunt Capacitance - 2 pF
R
S_LFXO
Equivalent series resistance - 100 kΩ
C
pin
Input Capacitance on XL1 & XL2 pads 5 - pF
Table 13: 32.768 kHz crystal (LFXO)
4.2.6 Antenna radiation patterns
Figure 3 provides an overview of the measurement procedure and describes how the NINA-B406
module is aligned to the XYZ-coordinate system.
A measurement is taken at every dotted position above the module image (shown left). Each
measurement is represented as a grid point in the radiation pattern (shown right).
Figure 3: Measurement procedure for determining radiation patterns