NRF24L01G NORDIC SEMICONDUCTOR, NRF24L01G Datasheet - Page 59

• Manufacturer Part Number: NRF24L01G
• Description: IC, RF TRANSCEIVER, 2.4-2.4835GHZ QFN-20
• Manufacturer: NORDIC SEMICONDUCTOR

Specifications of NRF24L01G

• Transmitting Current: 11.3mA
• Data Rate: 2Mbps
• Frequency Range: 2.4GHz To 2.4835GHz
• Modulation Type: GFSK
• Sensitivity Dbm: -82dBm
• Rf Ic Case Style: QFN
• No. Of Pins: 20
• Sensitivity (dbm): -82dBm
• Supply Voltage Range: 1.9V To 3.6V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

nRF24L01 Product Specification
This chapter describes peripheral circuitry and PCB layout requirements that are important for achieving
optimum RF performance from the nRF24L01.
10.1
The ANT1 and ANT2 output pins provide a balanced RF output to the antenna. The pins must have a DC
path to VDD_PA, either through a RF choke or through the center point in a balanced dipole antenna. A
load of 15Ω+j88Ω is recommended for maximum output power (0dBm). Lower load impedance (for
instance 50Ω) can be obtained by fitting a simple matching network between the load and ANT1 and ANT2.
A recommended matching network for 50
10.2
A crystal being used with the nRF24L01 must fulfil the specifications given in
To achieve a crystal oscillator solution with low power consumption and fast start-up time a crystal with a
low load capacitance specification must be used. A lower C
faster start-up time, but may increase the cost of the crystal. Typically C
C
The crystal load capacitance, C
C
and C
and XC2 pins respectively; the value is typically 1pF for each of these pins.
10.3
When using an MCU to drive the crystal reference input XC1 of the nRF24L01 transceiver the rules
described in the following sections
10.3.1
The requirement of load capacitance C
input. The frequency accuracy of ±60ppm is still required to get a functional radio link. The nRF24L01
loads the crystal by 1pF in addition to the PCB routing.
10.3.2
The input signal should not have amplitudes exceeding any rail voltage. Exceeding rail voltage excites the
ESD structure and the radio performance is degraded below specification. You must use an external DC
block if you are testing the nRF24L01 with a reference source that has no DC offset (which is often the
case with a RF source).
Revision 2.0
10
C
0max
1
L
and C
=
=7.0pF.
PCB2
C
C
1
1
'
'
+
⋅
2
C
C
Peripheral RF Information
2
2
are SMD capacitors as shown in the application schematics, see
'
are the layout parasitic on the circuit board. C
'
, where C
Crystal oscillator
Antenna output
nRF24L01 sharing crystal with an MCU
Crystal parameters
Input crystal amplitude and current consumption
1
’ = C
1
+ C
L
, is given by:
PCB1
(10.3.1
+C
L
is only set by the MCU when the MCU drives the nRF24L01 clock
Ω
I1
and 10.3.2) must be followed.
load impedance is described in
and C
Page 59 of 74
2
’ = C
2
I1
+ C
and C
0
PCB2
also gives lower current consumption and
I2
+ C
are the capacitance seen into the XC1
I2
0
=1.5pF at a crystal specified for
Appendix D on page
Figure 30. on page
Table 8. on page
17.
69. C
69.
PCB1