Low Power IEEE 802.15.4 Zero-IF 2.4 GHz
Transceiver IC
ADF7241
On-chip low power processor performs
Radio control
Packet management
FEATURES
Frequency range (global ISM band)
2400 MHz to 2483.5 MHz
IEEE 802.15.4-2006-compatible (250 kbps)
Low power consumption
Packet management support
Insertion/detection of preamble address/SFD/FCS
IEEEE 802.15.4-2006 frame filtering
IEEEE 802.15.4-2006 CSMA/CA unslotted modes
Flexible 256-byte transmit/receive data buffer
SPORT mode
19 mA (typical) in receive mode
21.5 mA (typical) in transmit mode (PO = 3 dBm)
1.7 μA, 32 kHz crystal oscillator wake-up mode
High sensitivity
Flexible multiple RF port interface
External PA/LNA support hardware
Switched antenna diversity support
Wake-up timer
−95 dBm at 250 kbps
Programmable output power
−20 dBm to +4.8 dBm in 2 dB steps
Integrated voltage regulators
1.8 V to 3.6 V input voltage range
Excellent receiver selectivity and blocking resilience
Zero-IF architecture
Complies with EN300 440 Class 2, EN300 328, FCC CFR47
Part 15, ARIB STD-T66
Digital RSSI measurement
Very few external components
Integrated PLL loop filter, receive/transmit switch, battery
monitor, temperature sensor, 32 kHz RC and crystal
oscillators
Flexible SPI control interface with block read/write access
Small form factor 5 mm × 5 mm 32-lead LFCSP package
Fast automatic VCO calibration
Automatic RF synthesizer bandwidth optimization
APPLICATIONS
Wireless sensor networks
Automatic meter reading/smart metering
Industrial wireless control
Healthcare
Wireless audio/video
Consumer electronics
ZigBee
FUNCTIONAL BLOCK DIAGRAM
ADF7241
4kB
8-BIT
DAC
ADC
PROGRAM
PROCESSOR
ROM
LNA1
DSSS
DEMOD
2kB
PROGRAM
RAM
RADIO
CONTROLLER
LNA2
256-BYTE
PACKET
RAM
ADC
DAC
AGC
OCL
CDR
PACKET
MANAGER
64-BYTE
BBRAM
256-BYTE
MCR
FRACTIONAL-N
RF SYNTHESIZER
PA
PRE-EMPHASIS FILTER
WAKE-UP CTRL
SPI
GPIO
SPORT
IRQ
32kHz
RC
OSC
32kHz
XTAL
OSC
BATTERY
MONITOR
TEMPERATURE
SENSOR
26MHz
OSC
LDO × 4
BIAS
Figure 1.
Rev. 0
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