High Performance
ISM Band Transceiver IC

ADF7025


Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
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.



One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2006 Analog Devices, Inc. All rights reserved.
FEATURES
Low power, zero-IF RF transceiver
Frequency bands
431 MHz to 464 MHz
862 MHz to 870 MHz
902 MHz to 928 MHz
Data rates supported
9.6 kbps to 384 kbps, FSK
2.3 V to 3.6 V power supply
Programmable output power
−16 dBm to +13 dBm in 63 steps
Receiver sensitivity
−104.2 dBm at 38.4 kbps, FSK
−100 dBm at 172.8 kbps, FSK
−95.8 dBm at 384 kbps, FSK
Low power consumption
19 mA in receive mode
28 mA in transmit mode (10 dBm output)
On-chip VCO and Fractional-N PLL
On-chip, 7-bit ADC and temperature sensor
Digital RSSI
Integrated TRx switch
Leakage current < 1 µA in power-down mode
APPLICATIONS
Wireless audio/video
Remote control/security systems
Wireless metering
Keyless entry
Home automation
FUNCTIONAL BLOCK DIAGRAM
Tx/Rx
CONTROL
AGC
CONTROL
FSK
DEMODULATOR
DATA
SYNCHRONIZERRSSI 7-BIT ADC
GAIN
DIV R
SERIAL
PORT
RFOUT
OFFSET
CORRECTION
OFFSET
CORRECTION
LNA
VCO
PFDCP
OSC1 OSC2
DIVIDERS/
MUXING
N/N+1DIV P
MUX
TEMP
SENSOR
RING OSC
CLK
DIV
CLKOUT
TEST MUX
VCOIN CPOUT
BIAS LDO(1:4)
MUXOUTADCINRSET CREG(1:4)
R
LNA
RFIN
RFINB
SLE
SDATA
CE
DATA CLK
SREAD
SCLK
INT/LOCK
DATA I/O
FSK MOD
CONTROL
Σ-∆
MODULATOR
LP FILTER
05
54
2-
00
1

Figure 1.