High Performance
FSK/ASK Transceiver IC
ADF7020-1
Data Sheet
On-chip VCO and fractional-N PLL
FEATURES
On-chip 7-bit ADC and temperature sensor
Fully automatic frequency control loop (AFC) compensates
for lower tolerance crystals
Digital RSSI
Integrated TRx switch
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
Leakage current <1 µA in power-down mode
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
APPLICATIONS
Low cost wireless data transfer
Wireless medical applications
Remote control/security systems
Wireless metering
Keyless entry
Home automation
Process and building control
17.6 mA in receive mode
21 mA in transmit mode (10 dBm output)
FUNCTIONAL BLOCK DIAGRAM
RSET
CREG(1:4)
LDO(1:4)
ADCIN
MUXOUT
TEMP
R
POLARIZATION
TEST MUX
LNA
OFFSET
SENSOR
MUX
CORRECTION
LNA
FSK/ASK
DATA
SYNCHRONIZER
R
FIN
DEMODULATOR
7-BIT ADC
RSSI
IF FILTER
R
FINB
GAIN
OFFSET
CORRECTION
CE
AGC
CONTROL
DATA CLK
DATA I/O
Tx/Rx
CONTROL
FSK MOD
CONTROL
GAUSSIAN
FILTER
Σ-∆
MODULATOR
AFC
INT/LOCK
CONTROL
DIVIDERS/
MUXING
DIV P
N/N+1
RFOUT
SLE
SDATA
SREAD
SCLK
SERIAL
PORT
VCO
CP
PFD
CLK
DIV
DIV R
RING OSC
L1 L2 VCOIN CPOUT
OSC1 OSC2
CLKOUT
Figure 1.
Rev. A
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