EM2420 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 EM2420
기능 2.4 GHz IEEE 802.15.4 / ZigBee RF Transceiver
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EM2420 데이터시트, 핀배열, 회로
2.4 GHz IEEE 802.15.4 / ZigBee RF Transceiver
2.4 GHz IEEE 802.15.4 systems
ZigBee systems
Consumer Electronics
Product Description
The EM2420 is a true single-chip 2.4 GHz
IEEE 802.15.4 compliant RF transceiver
designed for low-power and low-voltage
wireless applications. The EM2420 includes
a digital direct sequence spread spectrum
baseband modem and an effective
datarate of 250 kbps. The EM2420 chip is
only available from Ember with a licensed
Ember networking stack and is targeted to
approved 8-bit processors.
The EM2420 is a low-cost, highly integrated
solution for robust wireless communication
in the 2.4 GHz unlicensed ISM band. It
complies with world-wide regulations
covered by EN 300 440 (Europe), CFR47
Part 15 (US) and ARIB STD-T-66 (Japan).
The EM2420 provides extensive hardware
support for packet handling, data
buffering, burst transmissions, data
encryption, data authentication, clear
channel assessment, link quality indication
and packet timing information. These
Industrial Control
Home/building automation
PC peripherals
features reduce the load on the host
controller and allow the EM2420 to
interface low-cost microcontrollers.
The configuration interface and transmit /
receive FIFOs of the EM2420 are accessed
via a SPI interface. In a typical application,
the EM2420 will be used together with a
microcontroller and a few external passive
The EM2420 is manufactured to a 0.18 µm
CMOS process.
Key Features
True single-chip 2.4 GHz IEEE
802.15.4 compliant RF transceiver
with baseband modem, MAC support,
and networking stack.
DSSS baseband modem with 2
MChips/s and 250 kbps effective data
Suitable for both RFD and FFD
Low current consumption (RX: 19.7
mA, TX: 17.4 mA)
Low supply voltage (2.1 – 3.6 V) with
integrated voltage regulator
Low supply voltage (1.6 – 2.0 V) with
external voltage regulator
No external RF switch / filter needed
I/Q low-IF receiver
I/Q direct upconversion transmitter
Very few external components
128 (RX) + 128 (TX) byte data
Digital RSSI / LQI support
Hardware MAC encryption (AES-128)
Battery monitor
QLP-48 package, 7x7 mm
Complies with EN 300 440 and FCC
CFR-47 part 15, ARIB STD-T-66
Powerful and flexible development
tools available
Programmable output power
This document contains information on a preproduction product. Specifications and information herein are subject to
change without notice.
Ember Part Number: 120-0049-000C
EM2420 Datasheet
Page 1 of 89

EM2420 pdf, 반도체, 판매, 대치품
Nonce / counter _________________________________________________________________44
Stand-alone encryption ___________________________________________________________45
In-line security operations _________________________________________________________45
CTR mode encryption / decryption __________________________________________________46
CBC-MAC_____________________________________________________________________ 46
CCM _________________________________________________________________________46
Timing ________________________________________________________________________47
Linear IF and AGC Settings________________________________________________________48
RSSI / Energy Detection ___________________________________________________________48
Link Quality Indication ___________________________________________________________49
Clear Channel Assessment _________________________________________________________50
Frequency and Channel Programming _______________________________________________51
VCO and PLL Self-Calibration _____________________________________________________51
VCO _________________________________________________________________________51
PLL self-calibration______________________________________________________________51
Output Power Programming _______________________________________________________52
Voltage Regulator ________________________________________________________________53
Battery Monitor__________________________________________________________________53
Crystal Oscillator ________________________________________________________________55
Input / Output Matching __________________________________________________________56
Transmitter Test Modes ___________________________________________________________56
Unmodulated carrier _____________________________________________________________56
Modulated spectrum _____________________________________________________________57
System Considerations and Guidelines _______________________________________________59
Frequency hopping and multi-channel systems_________________________________________59
Data burst transmissions __________________________________________________________59
Crystal accuracy and drift _________________________________________________________59
Communication robustness ________________________________________________________59
Communication security __________________________________________________________59
Low cost systems________________________________________________________________60
Battery operated systems __________________________________________________________60
BER / PER measurements _________________________________________________________60
PCB Layout Recommendations _____________________________________________________61
Antenna Considerations ___________________________________________________________61
Configuration Registers ___________________________________________________________63
Test Output Signals _______________________________________________________________84
Package Description (QLP 48) ______________________________________________________86
Package thermal properties ________________________________________________________86
Soldering information ____________________________________________________________87
Plastic tube specification __________________________________________________________87
Carrier tape and reel specification ___________________________________________________87
Ordering Information _____________________________________________________________88
General Information ______________________________________________________________89
Ember Part Number: 120-0049-000C
EM2420 Datasheet
Page 4 of 89


EM2420 전자부품, 판매, 대치품
2400 – 2483.5 MHz RF Transceiver
Direct Sequence Spread Spectrum
(DSSS) transceiver
250 kbps data rate, 2 MChip/s chip
O-QPSK with half sine pulse shaping
Very low current consumption (RX:
19.7 mA, TX: 17.4 mA)
High sensitivity (-94 dBm)
High adjacent channel rejection (39
High alternate channel rejection (46
On-chip VCO, LNA and PA
Low supply voltage (2.1 – 3.6 V) with
on-chip voltage regulator
Programmable output power
I/Q low-IF soft decision receiver
I/Q direct up-conversion transmitter
Separate transmit and receive FIFOs
128 byte transmit data FIFO
128 byte receive data FIFO
Very few external components
Only reference crystal and a
minimized number of passives
No external filters needed
Easy configuration interface
4-wire SPI interface
Serial clock up to 10 MHz
802.15.4 MAC hardware support:
Automatic preamble generator
CRC-16 computation and checking
over the MAC payload
Clear Channel Assessment
Energy detection / digital RSSI
Link Quality Indication
Full automatic MAC security (CTR,
802.15.4 MAC hardware security:
Automated security operations within
the receive and transmit FIFOs.
CTR mode encryption / decryption
CBC-MAC authentication
CCM encryption / decryption and
Stand-alone AES encryption
Development tools available
Ember Evaluation Kit: A twelve-node
evaluation kit designed to allow
users to characterize their
application environment and
familiarize themselves with
Ember's Embedded RF solutions
and Network Management
Ember Developer Kit: Everything
developers need to create Ember
Enabled applications. The Ember
Developer Kit includes breakout
hardware, Ember RF modules and
the EmberNet Stack, a self-
organizing, self-healing, flexible
accommodates mesh, star and
hybrid network topologies. The
EmberNet Stack is accessible
though a straightforward and
powerful API.
Small size QLP-48 package, 7 x 7 mm
Complies with EN 300 440 and FCC
CFR47 part 15, ARIB STD-T-66
Ember Part Number: 120-0049-000C
EM2420 Datasheet
Page 7 of 89


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2.4 GHz IEEE 802.15.4 / ZigBee RF Transceiver

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