nRF24E2 Nordic VLSI, nRF24E2 Datasheet - Page 85

• Manufacturer Part Number: nRF24E2
• Description: Single Chip RF Transmitter + MCU + ADC NRF2402 2.4GHz RF Transmitter
• Manufacturer: Nordic VLSI

PRODUCT SPECIFICATION
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 200-700 . A de-embedded load impedance i.e. impedance seen at drain
terminals of the output transistors of 400 is recommended for maximum output
power (0dBm). Lower load impedance (for instance 50 ) can be obtained by fitting a
simple matching network.
Table 14-1 RF output power setting for the nRF24E2.
Tolerance includes initially accuracy and tolerance over temperature and aging.
Table 14-2 Crystal specification of the nRF24E2.
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, Co 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 selected frequency value must also be set into the nRF2401 configuration word,
please see Table 4-9 Crystal frequency setting.
Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone [phone] - Fax [phone]
Revision: 1.0
Conditions: VDD = 3.0V, VSS = 0V, T
12 MHz
16 MHz
20 MHz
4 MHz
8 MHz
11
10
01
00
L
=12pF is OK, but it is possible to use up to 16pF.
12pF
12pF
12pF
12pF
12pF
/
150
100
100
QhtrÃ'$ÂsÃ(
-10 dBm ±3dB
-20 dBm ±3dB
-5 dBm ±3dB
0 dBm ±3dB
A
= 27ºC, Load impedance = 400 .
7.0pF
7.0pF
7.0pF
7.0pF
7.0pF
PD[
±30ppm
±30ppm
±30ppm
±30ppm
±30ppm
16.0 mA
13.5 mA
12.4 mA
11.8 mA
August 2003