ADF7020-1_15 Datasheet, PDF (1/48 Pages) Analog Devices – High Performance FSK/ASK Transceiver IC

FEATURES
Low power, low IF transceiver
Frequency bands
135 MHz to 650 MHz, direct output
80 MHz to 325 MHz, divide-by-2 mode
Data rates supported
0.15 kbps to 200 kbps, FSK
0.15 kbps to 64 kbps, ASK
2.3 V to 3.6 V power supply
Programmable output power
−20 dBm to +13 dBm in 63 steps
Receiver sensitivity
−119 dBm at 1 kbps, FSK, 315 MHz
−114 dBm at 9.6 kbps, FSK, 315 MHz
−111.8 dBm at 9.6 kbps, ASK, 315 MHz
Low power consumption
17.6 mA in receive mode
21 mA in transmit mode (10 dBm output)
High Performance
FSK/ASK Transceiver IC
ADF7020-1
On-chip VCO and fractional-N PLL
On-chip 7-bit ADC and temperature sensor
Fully automatic frequency control loop (AFC) compensates
for lower tolerance crystals
Digital RSSI
Integrated TRx switch
Leakage current <1 μA in power-down mode
APPLICATIONS
Low cost wireless data transfer
Wireless medical applications
Remote control/security systems
Wireless metering
Keyless entry
Home automation
Process and building control
RSET
CREG(1:4)
FUNCTIONAL BLOCK DIAGRAM
ADCIN
MUXOUT
R_LNA
POLARIZATION LDO(1:4)
OFFSET
CORRECTION
TEMP
SENSOR
TEST MUX
RFIN
RFINB
RFOUT
LNA
GAIN
IF FILTER
RSSI
MUX _{7-BIT ADC}
FSK/ASK
DEMODULATOR
OFFSET
CORRECTION
AGC
CONTROL
FSK MOD
CONTROL
GAUSSIAN
FILTER
Σ-Δ
MODULATOR
AFC
CONTROL
DIVIDERS/
MUXING
DIV P
N/N+1
VCO
CP PFD
DIV R
RING OSC
CLK
DIV
DATA
SYNCHRONIZER
Tx/Rx
CONTROL
SERIAL
PORT
L1 L2 VCOIN CPOUT
OSC1 OSC2
Figure 1.
CLKOUT
CE
DATA CLK
DATA I/O
INT/LOCK
SLE
SDATA
SREAD
SCLK
Rev. 0
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