Product Specs

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Table Of Contents

PRELIMINARY PRODUCT SPECIFICATION

Nordic Semiconductor ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone +4772898900 - Fax +4772898989

Page 1 of 38

Revision: 1.1

November 2005

Single chip 2.4 GHz Transceiver

nRF24L01

FEATURES APPLICATIONS

 True single chip GFSK transceiver  Wireless mouse, keyboard, joystick



Complete OSI Link Layer in hardware



Keyless entry

 Enhanced ShockBurst™  Wireless data communication

 Auto ACK & retransmit  Alarm and security systems



Address and CRC computation



Home automation

 On the air data rate 1 or 2Mbps  Surveillance



Digital interface (SPI) speed 0-10 Mbps



Automotive

 125 RF channel operation  Telemetry



Short switching time enable frequency hopping



Intelligent sports equipment



Fully RF compatible with nRF24XX



Industrial sensors



5V tolerant signal input pads



Toys



20-pin package (QFN20 4x4mm)

 Uses ultra low cost +/- 60 ppm crystal

 Uses low cost chip inductors and 2-layer PCB



Power supply range: 1.9 to 3.6 V

GENERAL DESCRIPTION

nRF24L01 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, a demodulator, modulator and Enhanced ShockBurst™ protocol

engine. Output power, frequency channels, and protocol setup are easily programmable

through a SPI interface. Current consumption is very low, only 9.0mA at an output

power of -6dBm and 12.3mA in RX mode. Built-in Power Down and Standby modes

makes power saving easily realizable.

QUICK REFERENCE DATA

Parameter

Value

Unit

Minimum supply voltage

1.9

Maximum output power

dBm

Maximum data rate

2000

kbps

Supply current in TX mode @ 0dBm output power

11.3

Supply current in RX mode @ 2000 kbps

12.3

Temperature range

-40 to +85

C

Sensitivity @ 1000 kbps

-85

dBm

Supply current in Power Down mode

900

Table 1 nRF24L01 quick reference data

Summary of content (38 pages)

PAGE 1
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single chip 2.
PAGE 2
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver Type Number Description nRF24L01 nRF24L01 IC nRF24L01-EVKIT Version 20 pin QFN 4x4, lead free (green) Bare Dice Evaluation kit (2 test PCB, 2 configuration PCB, SW) A A 1.
PAGE 3
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver ELECTRICAL SPECIFICATIONS Conditions: VDD = +3V, VSS = 0V, TA = - 40ºC to + 85ºC Symbol Parameter (condition) Notes Min. Typ. Max. Units 1.9 -40 3.0 +27 3.6 +85 V ºC 0.7VDD VSS 5.25 0.3VDD V V VDD- 0.3 VSS VDD 0.
PAGE 4
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver 2 Usable band is determined by local regulations Antenna load impedance = 100+j175 4 Antenna load impedance = 100+j175. Effective data rate 1000kbps or 2000 kbps 5 Antenna load impedance = 100+j175. Effective data rate 10kbps and full packets 3 Nordic Semiconductor ASA Revision: 1.
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PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver Table 4 nRF24L01 RF specifications IVDD IVDD RXSENS RXSENS C/ICO C/I1ST C/I2ND C/I3RD C/ICO C/I1ST C/I2ND C/I3RD 6 7 8 9 Receiver operation Supply current one channel 2000kbps Supply current one channel 1000kbps Sensitivity at 0.1%BER (@2000kbps) Sensitivity at 0.
PAGE 6
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver Package Type Saw QFN20 (4x4 mm) Min Typ. Max A 0.80 0.85 0.95 A1 0.00 0.02 0.05 A3 K D/E e 0.20 REF. 0.20 min 4.0 BSC12 0.5 BSC D2/E2 2.50 2.60 2.70 L 0.35 0.40 0.45 L1 0.15 max Figure 3 nRF24L01 Package Outline. 12 BSC: Basic Spacing between Centers, ref. JEDEC standard 95, page 4.17-11/A Nordic Semiconductor ASA Revision: 1.
PAGE 7
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver Package marking: n D Y R F B D D D D Y W W L X D L Abbreviations: DDDDDD – Product number, e.g. 24L01 B – Build Code, i.e. unique code for production sites, package type and test platform X – "X" grade, i.e. Engineering Samples (optional) YY – 2 digit Year number WW – 2 digit Week number LL – 2 letter wafer lot numbercode Absolute Maximum Ratings Supply voltages VDD.....................................V to + 3.6V VSS.....
PAGE 8
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.
PAGE 9
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.
PAGE 10
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver Packet Handling Methods nRF24L01 has the following Packet Handling Methods:  ShockBurst™ (compatible with nRF2401, nRF24E1, nRF2402 and nRF24E2 with 1Mbps data rate, see page 24)  Enhanced ShockBurst™ ShockBurst™ ShockBurst™ makes it possible to use the high data rate offered by nRF24L01 without the need of a costly, high-speed microcontroller (MCU) for data processing/clock recovery.
PAGE 11
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver TX3 TX4 TX2 TX5 TX1 TX6 RX Frequency Channel N Figure 4: nRF24L01 in a star network configuration An nRF24L01 configured as primary RX (PRX) will be able to receive data trough 6 different data pipes, see Figure 4. A data pipe will have a unique address but share the same frequency channel.
PAGE 12
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver Figure 5: Example on how the acknowledgement addressing is done An nRF24L01 configured as PTX with Enhanced ShockBurst™ enabled, will use the ShockBurst™ feature to send a packet whenever the microcontroller wants to. After the packet has been transmitted, nRF24L01 will switch on its receiver and expect an acknowledgement to arrive from the terminating part.
PAGE 13
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver Enhanced ShockBurst™ Transmitting Payload: 1. The configuration bit PRIM_RX has to be low. 2. When the application MCU has data to send, the address for receiving node (TX_ADDR) and payload data (TX_PLD) has to be clocked into nRF24L01 via the SPI interface. The width of TX-payload is counted from number of bytes written into the TX FIFO from the MCU. TX_PLD must be written continuously while holding CSN low.
PAGE 14
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver 2. After 130µs nRF24L01 is monitoring the air for incoming communication. 3. When a valid packet has been received (matching address and correct CRC), the payload is stored in the RX-FIFO, and the RX_DR bit in status register is set high. The IRQ pin will be active when RX_DR is high. RX_P_NO in status register will indicate what data pipe the payload has been received in. 4.
PAGE 15
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver 1: PRX device: The PRX device compares the received PID with the last PID. If the PID fields are different, the packet is considered to be new. If the PID is equal to last received PID, the received packet might be the same as last time. The receiver must check if the CRC is equal to the previous CRC. If the CRC is equal to the previous one, the packet is probably the same, and will be discarded.
PAGE 16
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver (out of range), it may continue on the same frequency channel, but perform other adjustments. (A dummy write to the RF_CH will clear the PLOS_CNT.) Data Pipes nRF24L01 configured as PRX can receive data addressed to 6 different data pipes in one physical frequency channel. Each data pipe has its own unique address and can be configured to have individual behavior.
PAGE 17
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver DEVICE CONFIGURATION All configuration of nRF24L01 is defined by values in some configuration registers. All these registers are writable via the SPI interface. SPI Interface The SPI interface is a standard SPI interface with a maximum data rate of 10Mbps. Most registers are readable. SPI Instruction Set The available commands to be used on the SPI interface are shown below.
PAGE 18
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver writing can be terminated before all bytes in a multi-byte register has been written. In this case the unwritten MSByte(s) will remain unchanged. E.g. the LSByte of RX_ADDR_P0 can be modified by writing only one byte to the RX_ADDR_P0 register. The content of the status register will always be read to MISO after a high to low transition on CSN. Interrupt The nRF24L01 has an active low interrupt pin (IRQ).
PAGE 19
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver Tcwh CSN Tch Tcc Tcl Tcch SCK Tdc MOSI MISO Tdh C7 C6 Tcsd C0 Tcd Tcdz S7 S0 Figure 10 SPI NOP timing diagram.
PAGE 20
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver Memory Map All undefined bits in the table below are redundant. They will be read out as '0'.
PAGE 21
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.
PAGE 22
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver Address (Hex) Mnemonic Reset Value Type 08 OBSERVE_TX PLOS_CNT 7:4 0 R ARC_CNT 3:0 0 R CD Reserved CD 7:1 0 000000 0 R R 0A RX_ADDR_P0 39:0 0xE7E7E7E7E7 R/W 0B RX_ADDR_P1 39:0 0xC2C2C2C2C2 R/W 0C RX_ADDR_P2 7:0 0xC3 R/W 0D RX_ADDR_P3 7:0 0xC4 R/W 0E RX_ADDR_P4 7:0 0xC5 R/W 0F RX_ADDR_P5 7:0 0xC6 R/W 10 TX_ADDR 39:0 0xE7E7E7E7E7 R/W Transmit address. Used for a PTX device only.
PAGE 23
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver Address (Hex) Mnemonic 14 RX_PW_P3 Reserved RX_PW_P3 15 Reset Value Type 7:6 5:0 00 0 R/W R/W Only '00' allowed Number of bytes in RX payload in data pipe 3 (1 to 32 bytes). 0 Not Legal 1 = 1 byte … 32 = 32 bytes RX_PW_P4 Reserved RX_PW_P4 7:6 5:0 00 0 R/W R/W Only '00' allowed Number of bytes in RX payload in data pipe 4 (1 to 32 bytes).
PAGE 24
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.
PAGE 25
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver PACKET DESCRIPTION An Enhanced ShockBurst™ packet with payload (1-32 bytes). Preamble 1 byte Address 3-5 byte 9 bit CRC 0/1/2 byte Payload 1 - 32 byte flag bits. A ShockBurst™ packet compatible to nRF2401/nRF2402/nRF24E1/nRF24E2 devices. Preamble 1 byte Address 3-5 byte Preamble  Address    Flags Payload CRC          CRC 0/1/2 byte Payload 1 - 32 byte Preamble is used to detect 0 and 1 levels.
PAGE 26
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver IMPORTANT TIMING DATA The following timing applies for operation of nRF24L01. nRF24L01 Timing Information nRF24L01 timing Max. Power Down € Standby mode Standby modes € TX/RX mode Minimum CE high Delay from CE pos. edge to CSN low Min. 1.5ms 130s Name Tpd2stby Tstby2a Thce Tpece2csn 10s 4s Table 13 Operational timing of nRF24L01 When the nRF24L01 is in power down it must always settle in Standby for 1.
PAGE 27
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver In Figure 11 the sending of one packet and the acknowledgement of this packet is shown. The loading of payload to the PTX device is not shown in the figure. The PRX device is turned into RX mode (CE=1), and the PTX device is set into TX mode (CE=1 for minimum 10 s). After 130 s the transmission starts and is finished after another 37 s (1 byte payload).
PAGE 28
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver PERIPHERAL RF INFORMATION 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. A load of 100+j175 is recommended for maximum output power (0dBm). Lower load impedance (for instance 50 ) can be obtained by fitting a simple matching network.
PAGE 29
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver Input crystal amplitude & Current consumption The input signal should not have amplitudes exceeding any rail voltage, but any DCvoltage within this is OK. Exceeding rail voltage will excite the ESD structure and the radio performance is degraded below specification. If testing the nRF24L01 with a RF source with no DC offset as the reference source, the input signal will go below the ground level, which is not acceptable.
PAGE 30
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver PCB layout and de-coupling guidelines A well-designed PCB is necessary to achieve good RF performance. Keep in mind that a poor layout may lead to loss of performance, or even functionality, if due care is not taken. A fully qualified RF-layout for the nRF24L01 and its surrounding components, including matching networks, can be downloaded from www.nordicsemi.no.
PAGE 31
PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver APPLICATION EXAMPLE nRF24L01 with single ended matching network crystal, bias resistor, and decoupling capacitors. Part 22pF15 22pF15 2.2nF 4.7pF 1.5pF 1,5pF 33nF 1nF 10nF 6,8nH 3.
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PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver DEFINITIONS Data sheet status Objective product specification Preliminary product specification Product specification This data sheet contains target specifications for product development. This data sheet contains preliminary data; supplementary data may be published from Nordic Semiconductor ASA later. This data sheet contains final product specifications.
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PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver YOUR NOTES Nordic Semiconductor ASA Revision: 1.
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PRELIMINARY PRODUCT SPECIFICATION nRF24L01 Single Chip 2.4 GHz Radio Transceiver Nordic Semiconductor ASA – World Wide Distributors For Your nearest dealer, please see http://www.nordicsemi.no Main Office: Vestre Rosten 81, N-7075 Tiller, Norway Phone: +47 72 89 89 00, Fax: +47 72 89 89 89 Visit the Nordic Semiconductor ASA website at http://www.nordicsemi.no Nordic Semiconductor ASA Revision: 1.
PAGE 35
FCC Warning Statement Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
PAGE 36
2.2 List of applicable FCC rules List the FCC rules that are applicable to the modular transmitter. These are the rules that specifically establish the bands of operation, the power, spurious emissions, and operating fundamental frequencies. DO NOT list compliance to unintentional-radiator rules (Part 15 Subpart B) since that is not a condition of a module grant that is extended to a host manufacturer. See also Section 2.
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2.5 Trace antenna designs For a modular transmitter with trace antenna designs, see the guidance in Question 11 of KDB Publication 996369 D02 FAQ – Modules for Micro-Strip Antennas and traces. The integration information shall include for the TCB review the integration instructions for the following aspects: layout of trace design, parts list (BOM), antenna, connectors, and isolation requirements.4 a) Information that includes permitted variances (e.g.
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2.8 Label and compliance information Grantees are responsible for the continued compliance of their modules to the FCC rules. This includes advising host product manufacturers that they need to provide a physical or e-label stating “Contains FCCID” with their finished product. See Guidelines for Labeling and User Information for RF Devices – KDB Publication 784748.