io-homecontrol-Compliant RF Transceiver

ADF7022

Rev. SpA

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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

−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

ADCIN_ATB3

SCLK

MOSI

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

WAKE UP CONTROL

TIMER UNIT

64-BYTE

BBRAM

TEMP

SENSOR

BATTERY

MONITOR

CLOCK

DIVIDER

GPIO

TEST

DAC

ANALOG

TEST

PA RAMP

PROFILE

PA

8-BIT

ADC

LOOP

FILTER

CHARGE

PUMP

PFD

DIVIDER

Σ-∆

MODULATOR

GAUSSIAN

FILTER

32kHz

RCOSC

32kHz

OSC

PA

ADF7022

256-BYTE

MCR RAM

DIVIDER

XOSC26N XOSC26P

XOSC32KP_GP5_ATB1

XOSC32KN_ATB2

RBIAS

CREGRFx CREGVCO CREGSYNTH

CREGDIGx

Figure 1.

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