High Performance
ISM Band Transceiver IC
ADF7025
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
鈭?6 dBm to +13 dBm in 63 steps
Receiver sensitivity
鈭?04.2 dBm at 38.4 kbps, FSK
鈭?00 dBm at 172.8 kbps, FSK
鈭?5.8 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 碌A(chǔ) in power-down mode
APPLICATIONS
Wireless audio/video
Remote control/security systems
Wireless metering
Keyless entry
Home automation
FUNCTIONAL BLOCK DIAGRAM
RSET
CREG(1:4)
ADCIN
MUXOUT
R
LNA
BIAS
LDO(1:4)
OFFSET
CORRECTION
TEMP
SENSOR
TEST MUX
LNA
RFIN
RFINB
GAIN
OFFSET
CORRECTION
LP FILTER
RSSI
MUX
7-BIT ADC
FSK
DEMODULATOR
DATA
SYNCHRONIZER
CE
AGC
CONTROL
危-鈭?/div>
MODULATOR
DATA CLK
Tx/Rx
CONTROL
DATA I/O
FSK MOD
CONTROL
INT/LOCK
DIVIDERS/
MUXING
RFOUT
DIV P
N/N+1
SLE
SERIAL
PORT
SDATA
SREAD
SCLK
DIV R
RING
OSC
CLK
DIV
05542-001
VCO
CP
PFD
VCOIN CPOUT
OSC1
OSC2
CLKOUT
Figure 1.
Rev. A
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