PRODUCT SPECIFICATION
Single chip 2.4 GHz Transceiver
FEATURES
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nRF2401A
Wireless mouse, keyboard, joystick
Keyless entry
Wireless data communication
Alarm and security systems
Home automation
Surveillance
Automotive
Telemetry
Intelligent sports equipment
Industrial sensors
Toys
APPLICATIONS
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True single chip GFSK transceiver in a small
24-pin package (QFN24 5x5mm)
Data rate 0 to1Mbps
Only 2 external components
Multi channel operation
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125 channels
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Channel switching time <200µs.
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Support frequency hopping
Data slicer / clock recovery of data
Address and CRC computation
DuoCeiver™ for simultaneous dual receiver
topology
ShockBurst™ mode for ultra-low power
operation and relaxed MCU performance
Power supply range: 1.9 to 3.6 V
Low supply current (TX), typical 10.5mA peak
@ -5dBm output power
Low supply current (RX), typical 18mA peak in
receive mode
100 % RF tested
No need for external SAW filter
World wide use
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GENERAL DESCRIPTION
nRF2401A is a single-chip radio transceiver for the world wide 2.4 - 2.5 GHz ISM
band. The transceiver consists of a fully integrated frequency synthesizer, a power
amplifier, a crystal oscillator and a modulator. Output power and frequency channels
are easily programmable by use of the 3-wire serial interface. Current consumption is
very low, only 10.5mA at an output power of -5dBm and 18mA in receive mode.
Built-in Power Down modes makes power saving easily realizable.
QUICK REFERENCE DATA
Parameter
Minimum supply voltage
Maximum output power
Maximum data rate
Supply current in transmit @ -5dBm output power
Supply current in receive mode
Temperature range
Sensitivity
Supply current in Power Down mode
Value
1.9
0
1000
10.5
18
-40 to +85
-93
400
Unit
V
dBm
kbps
mA
mA
°C
dBm
nA
Table 1 nRF2401A quick reference data
Nordic Semiconductor ASA
Revision: 1.0
- Vestre Rosten 81, N-7075 Tiller, Norway
-
Phone +4772898900
-
Page 1 of 38
Fax +4772898989
December 2004
PRODUCT SPECIFICATION
nRF2401A Single Chip 2.4 GHz Radio Transceiver
Type Number
NRF2401A
NRF2401AG
NRF2401A-EVKIT
Description
24 pin QFN 5x5
24 pin QFN 5x5, lead free (green)
Evaluation kit (2 test PCB, 2 configuration PCB, SW)
Version
A
A
1.0
Table 2 nRF2401A ordering information
BLOCK DIAGRAM
VDD=3V
VDD=3V
VDD=3V
VSS=0V
VSS=0V
VSS=0V
VSS=0V
DVDD
XC1
PWR_UP
DuoCeiver
TM
ShockBurst
TM
XC2
VSS_PA=0V
IF BPF
DEMOD
CE
DR2
Data
Channel 2
LNA
VDD_PA=1.8V
DOUT2
CLK2
DR1
Data
Channel 1
DATA
CLK1
Clock
Recovery,
DataSlicer
ADDR
Decode
CRC
Code/Decode
FIFO
In/Out
GFSK
Filter
Frequency
Synthesiser
ANT1
PA
400Ω
ANT2
IREF
22kΩ
3-wire
interface
CS
Figure 1 nRF2401A with external components.
Nordic Semiconductor ASA
Revision: 1.0
- Vestre Rosten 81, N-7075 Tiller, Norway
-
Phone +4772898900
-
Page 2 of 38
Fax +4772898989
December 2004
PRODUCT SPECIFICATION
nRF2401A Single Chip 2.4 GHz Radio Transceiver
PIN FUNCTIONS
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Name
CE
DR2
CLK2
DOUT2
CS
DR1
CLK1
DATA
DVDD
VSS
XC2
XC1
VDD_PA
ANT1
ANT2
VSS_PA
VDD
VSS
IREF
VSS
VDD
VSS
PWR_UP
VDD
Pin function
Digital Input
Digital Output
Digital I/O
Digital Output
Digital Input
Digital Output
Digital I/O
Digital I/O
Power Output
Power
Analog Output
Analog Input
Power Output
RF
RF
Power
Power
Power
Analog Input
Power
Power
Power
Digital Input
Power
Description
Chip Enable Activates RX or TX mode
RX Data Ready at Data Channel 2 (ShockBurst™ only)
Clock Output/Input for RX Data Channel 2
RX Data Channel 2
Chip Select Activates Configuration Mode
RX Data Ready at Data Channel 1 (ShockBurst™ only)
Clock Input (TX) & Output/Input (RX) for Data Channel 1
3-wire interface
RX Data Channel 1/TX Data Input/ 3-wire interface
Positive Digital Supply output for de-coupling purposes
Ground (0V)
Crystal Pin 2
Crystal Pin 1
Power Supply (+1.8V) to Power Amplifier
Antenna interface 1
Antenna interface 2
Ground (0V)
Power Supply (+3V DC)
Ground (0V)
Reference current
Ground (0V)
Power Supply (+3V DC)
Ground (0V)
Power Up
Power Supply (+3V DC)
Table 3 nRF2401A pin function
PIN ASSIGNMENT
VDD PWR_UP
VSS
VDD
VSS
IREF
24
CE
23
22
21
20
19
18
VSS
1
2
3
4
nRF2401A
QFN24 5x5
DR2
17
16
15
14
13
VDD
CLK2
VSS_PA
ANT2
CS
5
6
7
CLK1
ANT1
DR1
VDD_PA
8
DATA
9
DVDD
10
VSS
11
XC2
12
XC1
Figure 2 nRF2401A pin assignment (top view) for a QFN24 5x5 package.
Nordic Semiconductor ASA
Revision: 1.0
- Vestre Rosten 81, N-7075 Tiller, Norway
-
Phone +4772898900
-
Fax +4772898989
December 2004
Page 3 of 38
PRODUCT SPECIFICATION
nRF2401A Single Chip 2.4 GHz Radio Transceiver
ELECTRICAL SPECIFICATIONS
Conditions: VDD = +3V, VSS = 0V, T
A
= - 40ºC to + 85ºC
Symbol Parameter (condition)
Notes
Min.
1.9
-40
Typ.
3.0
+27
Max.
3.6
+85
Units
V
ºC
Operating conditions
VDD
TEMP
Supply voltage
Operating Temperature
Digital input pin
V
IH
V
IL
HIGH level input voltage
LOW level input voltage
VDD- 0.3
Vss
VDD
0.3
V
V
Digital output pin
V
OH
V
OL
HIGH level output voltage (I
OH
=-0.5mA)
LOW level output voltage (I
OL
=0.5mA)
VDD- 0.3
Vss
VDD
0.3
V
V
General RF conditions
f
OP
f
XTAL
∆f
R
GFSK
R
GFSK
F
CHANNEL
Operating frequency
Crystal frequency
Frequency deviation
Data rate ShockBurst™
Data rate Direct Mode
Channel spacing
1)
2)
2400
4
±156
3)
>0
250
1
1000
1000
2524
20
MHz
MHz
kHz
kbps
kbps
MHz
Transmitter operation
P
RF
P
RFC
P
RFCR
P
BW
P
RF2
P
RF3
I
VDD
I
VDD
I
VDD
I
VDD
I
VDD
Maximum Output Power
RF Power Control Range
RF Power Control Range Resolution
20dB Bandwidth for Modulated Carrier
2
nd
Adjacent Channel Transmit Power 2MHz
3
rd
Adjacent Channel Transmit Power 3MHz
Supply current @ 0dBm output power
Supply current @ -20dBm output power
Average Supply current @ -5dBm output
power, ShockBurst™
Average Supply current in stand-by mode
Average Supply current in power down
4)
16
0
20
+4
±3
1000
-20
-40
5)
5)
6)
7)
13
8.8
0.8
12
400
dBm
dB
dB
kHz
dBm
dBm
mA
mA
mA
µA
nA
Receiver operation
I
VDD
I
VDD
I
VDD
I
VDD
RX
SENS
RX
SENS
C/I
CO
C/I
1ST
C/I
2ND
C/I
3RD
RX
B
1)
2)
3)
4)
5)
6)
7)
8)
Supply current one channel 250kbps
Supply current one channel 1000kbps
Supply current two channels 250kbps
Supply current two channels 1000kbps
Sensitivity at 0.1%BER (@250kbps)
Sensitivity at 0.1%BER (@1000kbps)
C/I Co-channel
1
st
Adjacent Channel Selectivity C/I 1MHz
2
nd
Adjacent Channel Selectivity C/I 2MHz
3
rd
Adjacent Channel Selectivity C/I 3MHz
Blocking Data Channel 2
8)
8)
8)
8)
18
19
23
25
-93
-85
10/4
-20/0
-37/-20
-43/-30
-45/-41
mA
mA
mA
mA
dBm
dBm
dB
dB
dB
dB
dB
Usable band is determined by local regulations
The crystal frequency may be chosen from 5 different values (4, 8, 12, 16, and 20MHz) which are specified in the
configuration word, see Table 8. 16MHz are required for 1Mbps operation.
Data rate must be either 250kbps or 1000kbps.
Antenna load impedance = 100Ω+j175Ω
Antenna load impedance = 100Ω+j175Ω. Effective data rate 250kbps or 1Mbps.
Antenna load impedance = 100Ω+j175Ω. Effective data rate 10kbps.
Current if 4 MHz crystal is used.
250kbps/1000kbps.
Table 4 nRF2401A RF specifications
Nordic Semiconductor ASA
Revision: 1.0
- Vestre Rosten 81, N-7075 Tiller, Norway
-
Phone +4772898900
-
Fax +4772898989
December 2004
Page 4 of 38
PRODUCT SPECIFICATION
nRF2401A Single Chip 2.4 GHz Radio Transceiver
PACKAGE OUTLINE
nRF2401AG uses the GREEN QFN24 5x5 package, with matt tin plating.
nRF2401A uses the QFN24 5x5 package, with SnPb plating. Dimensions are in mm.
Package Type
Punch QFN24
(5x5 mm)
Min
typ.
Max
A
0.8
0.9
A
1
0.0
0.02
0.05
A2
0.65
0.69
b
0.25
0.3
0.35
D/E
5 BSC
D1/E1
4.75
BSC
e
0.65 BSC
J
3.47
3.57
3.67
K
3.47
3.57
3.67
L
0.3
0.4
0.5
R
1.235
1.335
1.435
Figure 3 nRF2401AG GREEN Package outline.
Nordic Semiconductor ASA
Revision: 1.0
- Vestre Rosten 81, N-7075 Tiller, Norway
-
Phone +4772898900
-
Page 5 of 38
Fax +4772898989
December 2004
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