Datasheet

Revision 1.5 Page 39 of 41
nRF905 Product Specification
Table 29. Recommended external components, single ended connection to 50 Ω antenna
L3 Chip inductor, (Impedance matching) 0603 nH
@ 433MHz: SRF> 433MHz 39
±5%
@ 868MHz: SRF> 868MHz 12
±5%
@ 915MHz: SRF> 915MHz 12
±5%
R1 0.1W chip resistor, (Crystal oscillator
bias)
0603 1
±5% MΩ
R2 0.1W chip resistor, (Reference bias) 0603 22 ±1% kΩ
U1 nRF905 Transceiver QFN32L/5x5
X1 Crystal, C
L
= 12pF LxWxH =
4.0x2.5x0.8
16 MHz
@ 433MHz
±60ppm
@ 868MHz
±30ppm
@ 915MHz
±30ppm
Component Description Size Value Tol. Units