NRF2402 Datasheet, PDF (24/31 Pages) List of Unclassifed Manufacturers – Single chip 2.4 GHz Transmitter

PRODUCT SPECIFICATION
nRF2402/nRF2402G Single Chip 2.4 GHz Radio Transmitter
Output Power adjustment
Power setting bits of RF output power DC current
configuring word
consumption
11
0 dBm ±3dB
11.5 mA
10
-5 dBm ±3dB
10.0 mA
01
-10 dBm ±3dB
8.5 mA
00
-20 dBm ±3dB
7.0 mA
Conditions: Load impedance = 100+j175 Ω.
Table 16 RF output power setting for the nRF2402/nRF2402G.
Crystal Specification
Tolerance includes initially accuracy and tolerance over temperature and aging.
Frequency
4MHz
8MHz
12MHz
16MHz
20MHz
C_L
8pF – 16pF
8pF – 16pF
8pF – 16pF
8pF – 16pF
8pF – 16pF
ESR
150Ω
100Ω
100Ω
100Ω
100Ω
C_0max
7.0pF
7.0pF
7.0pF
7.0pF
7.0pF
Tolerance
±30ppm
±30ppm
±30ppm
±30ppm
±30ppm
Table 17 Crystal specification of the nRF2402/nRF2402G
To achieve a crystal oscillator solution with low power consumption and fast start-up time, it
is recommended to specify the crystal with a low value of crystal load capacitance.
Specifying a lower value of crystal parallel equivalent capacitance, Co=1.5pF is also good,
but this can increase the price of the crystal itself. Typically Co=1.5pF at a crystal specified
for Co_max=7.0pF.
The crystal load capacitance, C_L, is given by:
C_L
=
C₁'⋅C₂ '
C₁ '+C₂ '
,
whereC₁ ' = C₁ + C _PCB1 + C_I1 and C ₂ ' = C ₂ + C_PCB2 + C _{I 2}
C₁ and C₂ are 0603 SMD capacitors as shown in the application schematics. C_PCB1 and C_PCB2
are the layout parasitic on the circuit board. C_I1 and C_I2 are the capacitance seen into the XC1
and XC2 pin respectively; the value is typical 1pF.
Nordic Semiconductor ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone [phone] - Fax [phone]
Revision: 2.0
Page 24 of 31
April 2005