ANALOG DEVICES ADF7022 Service Manual

io-homecontrol-Compliant RF Transceiver

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

FUNCTIONAL BLOCK DIAGRAM

DCIN_ATB3

ADF7022

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

−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

−3

BER)

FSK

RFIO_1 P

RFIO_1N

RFO2

LNA

PA RAMP PROFILE

DIVIDER

ADF7022

LDO2

LDO1

GPIO REFERS TO PIN G P0 TO PIN GP5.

RSSI/

LOGAMP

LOOP

FILTER

LDO3

CHARGE

PUMP

DIVIDER

Σ-∆

MODULATOR

BIAS

LDO4

MUX

ANALOG

8-BIT

ADC

TEST

DEMOD

DEV

SENSOR

CDR AFC AGC

GAUSSIAN

FILTER

TEMP

8-BIT RISC

PROCESSOR

BATTERY MONITOR

Figure 1.

For more information on the ADF7022, contact a local sales office at Analog Devices, Inc.

Rev. SpA

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.

4kB ROM

IO-H/C

MAC

2kB RAM

256-BYTE

PACKET

RAM

64-BYTE

BBRAM

256-BYTE

MCR RAM

WAKE UP CONTROL

TIMER UNI T

32kHz

RCOSC

OSC

IRQ

CTRL

SPI

GPIO

TEST

DAC

CLOCK

DIVIDER

26MHz

OSC

XOSC26N XOSC26PXOSC32KP_GP5_ATB1XOSC32KN_A TB2RBIASCREGRFx CREGVCO CREGSYNTH CREGDIGx

IRQ_GP3

CSN

MISO

SCLK

MOSI

GPIO

08266-001

ADF7022

NOTES

Rev. SpA | Page 2 of 2