NRF2401AG Nordic VLSI, NRF2401AG Datasheet - Page 32

• Manufacturer Part Number: NRF2401AG
• Manufacturer: Nordic VLSI

PRODUCT SPECIFICATION
nRF2401A Single Chip 2.4 GHz Radio Transceiver
Antenna output
The ANT1 & ANT2 output pins provide a balanced RF output to the antenna. The
pins must have a DC path to VDD, either via a RF choke or via the center point in a
dipole antenna. The load impedance seen between the ANT1/ANT2 outputs should be
in the range 200-700Ω. A load of 100Ω+j175Ω is recommended for maximum output
power (0dBm). Lower load impedance (for instance 50 Ω) can be obtained by fitting a
simple matching network.
Output Power adjustment
Crystal Specification
Tolerance includes initially accuracy and tolerance over temperature and aging.
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 C
Specifying a lower value of crystal parallel equivalent capacitance, C
but this can increase the price of the crystal itself. Typically C
specified for C
Nordic Semiconductor ASA
Revision: 1.1
PERIPHERAL RF INFORMATION
Conditions: VDD = 3.0V, VSS = 0V, T
Frequency
Power setting bits of
0max
configuring word
Table 20 RF output power setting for the nRF2401A.
12
16
20
4
8
=7.0pF.
Table 21 Crystal specification of the nRF2401A
- Vestre Rosten 81, N-7075 Tiller, Norway
11
10
01
00
L
=12pF is OK, but it is possible to use up to 16pF.
12pF
12pF
12pF
12pF
12pF
C
L
150 Ω
100 Ω
100 Ω
100 Ω
100 Ω
ESR
Page 32 of 40
RF output power
-10 dBm ±3dB
-20 dBm ±3dB
-5 dBm ±3dB
A
0 dBm ±3dB
= 27ºC, Load impedance = 100Ω+j175Ω.
C
7.0pF
7.0pF
7.0pF
7.0pF
7.0pF
0max
-
Phone [phone]
consumption
DC current
Tolerance
±30ppm
±30ppm
±30ppm
±30ppm
±30ppm
13.0 mA
10.5 mA
0
9.4 mA
8.8 mA
=1.5pF at a crystal
0
will also work,
-
Fax [phone]
March 2006