io-homecontrol-Compliant RF Transceiver
ADF7022
Rev. SpA
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rights of third parties that may result from its use. Specifications subject to change without notice. No
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FEATURES
Very low power, high performance, low IF transceiver
Fully integrated io-homecontrol compliant protocol covering
Layer 1, Layer 2, and time critical elements of Layer 3
Media access
Master, slave, and beacon modes supported
Automatic io-homecontrol channel scan
Automatic CRC, preamble, start byte insertion/check
UART data encoding as per io-homecontrol
Smart preamble detect/packet sniffing
Automatic address filtering
Low power modes
Autonomous packet handling without intervention of host
microprocessor thus significantly increasing battery life
1-way and 2-way communication supported
Automatic wake-up timer
32-bit hardware timer, 16-bit firmware timer (48 bits total)
Uses either
External 32 kHz crystal
Internal 32 kHz RC oscillator
Patented fast settling automatic frequency control (AFC)
Fully integrated image rejection calibration (patent pending)
Digital RSSI
Operating frequencies
Channel 1: 868.25 MHz
Channel 2: 868.95 MHz
Channel 3: 869.85 MHz
Very low power consumption
12.8 mA in receive mode with AGC active
11.9 mA in receive mode with manual AGC, ADC off
24.1 mA in transmit mode (10 dBm output)
0.75 μA in RCO wake mode
1.25 μA in XTO wake mode (32 kHz oscillator active)
38.4 μA average current in low power mode
Receiver sensitivity (10
−3
BER)
−108.5 dBm at 38.4 kbps FSK, 20 kHz deviation
Output power programmable up to 13.5 dBm
Automatic PA ramping
Dual PAs offer Tx antenna diversity
Very few external components
Integrated PLL loop filter
Integrated Rx/Tx switch
Integrated battery monitor
On-chip 8-bit ADC and temperature sensor
Efficient and flexible SPI control interface
4 lines available for low cost microcontroller interface
Flexible Tx and Rx data buffers
Efficient burst mode register access
1.8 V to 3.6 V power supply
5 mm × 5 mm, 32-lead LFCSP package
APPLICATIONS
Home automation
Process and building control
FUNCTIONAL BLOCK DIAGRAM
RSSI/
LOGAMP
LNA
DCIN_ATB3
SCLK
MOSI
1
GPIO REFERS TO PIN GP0 TO PIN GP5.
MISO
CSN
IRQ_GP3
RFIO_1P
RFIO_1N
RFO2
SPI
IRQ
CTRL
FSK
DEMOD
CDR
AFC
AGC
4kB ROM
IO-H/C
MAC
256-BYTE
PACKET
RAM
2kB RAM
8-BIT RISC
PROCESSOR
BIAS
26MHz
OSC
LDO4
LDO3
LDO2
LDO1
WAKE UP CONTROL
TIMER UNIT
64-BYTE
BBRAM
TEMP
SENSOR
BATTERY
MONITOR
CLOCK
DIVIDER
GPIO
TEST
DAC
ANALOG
TEST
PA RAMP
PROFILE
PA
MUX
8-BIT
ADC
LOOP
FILTER
CHARGE
PUMP
PF
D
DIVIDER
Σ-∆
MODULATOR
GAUSSIAN
FILTER
f
DEV
32kHz
RCOSC
32kHz
OSC
PA
ADF7022
256-BYTE
MCR RAM
GPIO
1
DIVIDER
08266-001
XOSC26N XOSC26PXOSC32KP_GP5_ATB1XOSC32KN_ATB2RBIASCREGRFx CREGVCO CREGSYNTH CREGDIGx
Figure 1.
For more information on the ADF7022, contact a local sales office at Analog Devices, Inc.
