ADF7021 Datasheet, PDF (1/44 Pages) Analog Devices – High Performance Narrowband ISM Transceiver IC

Preliminary Technical Data
High Performance Narrowband
ISM Transceiver IC
ADF7021
FEATURES
Low power, low IF transceiver
Frequency bands
80 MHz to 650 MHz
862 MHz to 940 MHz
Modulation schemes
2FSK, 3FSK, 4FSK
Spectral shaping
Gaussian and raised-cosine filtering
Data rates supported
0.05 kbps to 25 kbps
2.3 V to 3.6 V power supply
Programmable output power
−16 dBm to +13 dBm in 63 steps
Automatic PA ramp control
Receiver sensitivity
−125 dBm at 1 kbps, 2 FSK
On-chip VCO and fractional-N PLL
RSET
On-chip 7-bit ADC and temperature sensor
Fully automatic frequency control loop (AFC)
Digital RSSI
Integrated Tx/Rx switch
Leakage current <1 μA in power-down mode
APPLICATIONS
Narrow-band standards
ETSI EN 300-220, FCC Part 90, FCC Part 15, FCC Part 95,
ARIB STD-T67
Low cost, wireless data transfer
Remote control/security systems
Wireless metering
Private mobile radio
Wireless medical telemetry service (WMTS)
Keyless entry
Home automation
Process and building control
Pagers
FUNCTIONAL BLOCK DIAGRAM
CE
CREG(1:4)
MUXOUT
R_LNA
POLARIZATION
TEMP
SENSOR
MUX
7-BIT ADC
LDO(1:4)
TEST MUX
RFIN
RFINB
LNA
GAIN
IF FILTER
RSSI/
OFFSET
CORRECTION
2FSK
3FSK
4FSK
DEMODULATOR
CLOCK
AND DATA
RECOVERY
Tx/Rx
CONTROL
PA RAMP
RFOUT
DIVIDERS/
MUXING
MUX
VCO
AGC
CONTROL
AFC
CONTROL
SERIAL
PORT
DIV P
N/N + 1
Σ-Δ
MODULATOR
2FSK
3FSK
4FSK
MOD CONTROL
CP
PFD
DIV R
RING OSC
CLK
DIV
GAUSSIAN/
RAISED COSINE
FILTER
3FSK
ENCODING
L1 L2 VCOIN CPOUT
OSC1 OSC2
Figure 1.
CLKOUT
DATA CLK | TxDATA
DATA I/O | RxDATA
SWD
SLE
SDATA
SREAD
SCLK
Rev. PrI
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