High Performance
ISM Band Transceiver IC
ADF7025
FEATURES
Low power, zero-IF RF transceiver
Frequency bands
431 MHz to 464 MHz
On-chip VCO and Fractional-N PLL
On-chip, 7-bit ADC and temperature sensor
Digital RSSI
862 MHz to 870 MHz
Integrated TRx switch
902 MHz to 928 MHz
Leakage current < 1 µA in power-down mode
Data rates supported
APPLICATIONS
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
Wireless audio/video
Remote control/security systems
Wireless metering
Keyless entry
−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
Home automation
28 mA in transmit mode (10 dBm output)
FUNCTIONAL BLOCK DIAGRAM
RSET
BIAS
CREG(1:4)
LDO(1:4)
ADCIN
MUXOUT
TEMP
R
TEST MUX
LNA
OFFSET
CORRECTION
SENSOR
MUX
LNA
FSK
DEMODULATOR
DATA
SYNCHRONIZER
R
FIN
7-BIT ADC
RSSI
LP FILTER
RFINB
GAIN
OFFSET
CORRECTION
CE
AGC
DATA CLK
DATA I/O
CONTROL
Tx/Rx
CONTROL
FSK MOD
CONTROL
Σ-∆
MODULATOR
INT/LOCK
DIVIDERS/
MUXING
DIV P
N/N+1
RFOUT
SLE
SDATA
SREAD
SCLK
SERIAL
PORT
VCO
CP
PFD
CLK
DIV
DIV R
RING OSC
VCOIN CPOUT
CLKOUT
OSC1 OSC2
Figure 1.
Rev. A
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