PRODUCT SPECIFICATION
nRF2402 Single Chip 2.4 GHz Radio Transmitter
Nordic Semiconductor ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone +4772898900 - Fax +4772898989
Revision: 2.2 Page 29 of 33 May 2006
Application example
nRF2402 with single ended matching network
X1
16MHz
R1
1M
C1
22pF
C2
22pF
R2
22k
C5
1nF
C6
10nF
C3
4.7pF
L1
3.3nH
L2
10nH
C8
1.0pF
C7
1.0pF
VDD
VDD
PWR_UP
CE
CS
CLK
DIN
C4
2.2nF
VDD
RF output
C9
4.7pF
L3
5.6nH
VDD_PA
12
ANT2
11
ANT1
10
VSS_PA
9
PWR_UP
16
VSS
15
IREF
14
VDD
13
CE
1
CS
2
CLK
3
DIN
4
VSS
5
XC2
6
XC1
7
VDD
8
nRF2402
U1
NRF2402
Figure 18 nRF2402 schematic for RF layouts with single ended 50Ω antenna
Component Description Size Value Tolerance Units
C1 Capacitor ceramic, 50V, NPO 0603 22 ±5% pF
C2 Capacitor ceramic, 50V, NPO 0603 22 ±5% pF
C3 Capacitor ceramic, 50V, NPO 0603 4.7 ±5% pF
C4 Capacitor ceramic, 50V, X7R 0603 2.2 ±10% nF
C5 Capacitor ceramic, 50V, X7R 0603 1.0 ±10% nF
C6 Capacitor ceramic, 50V, X7R 0603 10 ±10% nF
R1 Resistor 0603 1.0 ±10%
MΩ
R2 Resistor 0603 22 ±1%
kΩ
U1 nRF2402 transmitter QFN16 / 4x4 nRF2402
X1 Crystal, CL = 12pF,
ESR < 100 ohm
LxWxH =
4.0x2.5x0.8
16
1)
+/- 30 ppm MHz
L1 Inductor
2)
0603 3.3 ± 5% nH
L2 Inductor
2)
0603 10 ± 5% nH
L3 Inductor
2)
0603 5.6 ± 5% nH
C7 Ceramic capacitor, 50V, NP0 0603 1.0 ± 0.1 pF pF
C8 Ceramic capacitor, 50V, NP0 0603 1.0 ± 0.1 pF pF
C9 Ceramic capacitor, 50V, NP0 0603 4.7 ± 0.25 pF pF
Table 17 Recommended components (BOM) in nRF2402 with antenna matching network
1)
nRF2402 can operate at several crystal frequencies, ref. the Crystal Spec. chapter.
2)
Self-resonant frequency (SFR) must be > 2.7 GHz
