ADF7020-1BCPZ Analog Devices Inc, ADF7020-1BCPZ Datasheet - Page 24

• Manufacturer Part Number: ADF7020-1BCPZ
• Description: IC TX FSK/ASK ISM BAND 48LFCSP
• Manufacturer: Analog Devices Inc

Specifications of ADF7020-1BCPZ

• Design Resources: Low power, Long Range, ISM Wireless Measuring Node (CN0164)
• Frequency: 431MHz ~ 478MHz and 862MHz ~ 956MHz
• Data Rate - Maximum: 200kbps
• Modulation Or Protocol: ASK, FSK
• Applications: Data Transfer, RKE, Remote Control/Security Systems
• Power - Output: -16dBm ~ 13dBm
• Sensitivity: -119dBm
• Voltage - Supply: 2.3 V ~ 3.6 V
• Current - Receiving: 17.6mA
• Current - Transmitting: 21mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LFCSP
• Receiving Current: 20.1mA
• Transmitting Current: 13mA
• Data Rate: 200Kbps
• Frequency Range: 135MHz To 650MHz
• Modulation Type: ASK, FSK, GFSK, GOOK, OOK
• Rf Ic Case Style: LFCSP
• No. Of Pins: 48
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 7mm
• Product Length (mm): 7mm
• Operating Supply Voltage (min): 2.3V
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (max): 3.6V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-ADF7020-1DBZ8 - BOARD EVAL ADF7020-1 128-142MHZEVAL-ADF7020-1DBZ7 - BOARD EVAL ADF7020-1 310-340MHZEVAL-ADF7020-1DBZ6 - BOARD EVAL ADF7020-1 470-510MHZEVAL-ADF7020-1DBZ4 - BOARD EVAL ADF7020-1 405-435MHZEVAL-ADF7020-1DBZ5 - BOARD EVAL ADF7020-2 ADJ FREQ
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant

ADF7020-1
AFC Performance
The improved sensitivity performance of the Rx when AFC is
enabled and in the presence of frequency errors is shown in
Figure 18. The maximum AFC pull-in range is ±50 kHz, which
corresponds to ±58 ppm at 868 MHz. This is the total error
tolerance allowed in the link. For example, in a point-to-point
system, AFC can compensate for two ±29 ppm crystals or one
±50 ppm crystal and one ±8 ppm TCXO.
AFC settling typically takes 48 bits to settle within ±1 kHz. This
can be improved by increasing the postdemodulator bandwidth
in Register 4 at the expense of Rx sensitivity.
When AFC errors have been removed using either the internal
or external AFC, further improvement in the receiver’s sensitivity
can be obtained by reducing the IF filter bandwidth using
Bits R1_DB (22:23).
AUTOMATIC SYNC WORD RECOGNITION
The ADF7020-1 also supports automatic detection of the sync
or ID fields. To activate this mode, the sync (or ID) word must
be preprogrammed in the ADF7020-1. In receive mode, this
Table 11. Sensitivity Values for Varying RF Frequency and Data Rates
Frequency
135 MHz
135 MHz
315 MHz
315 MHz
610 MHz
610 MHz
Data Rate (NRZ)
9.6 kbps
1.0 kbps
9.6 kbps
1.0 kbps
9.6 kbps
1.0 kbps
Deviation in
FSK Mode
±10 kHz
±5 kHz
±10 kHz
±5 kHz
±10 kHz
±5 kHz
FSK Sensitivity
at BER = 1E-3,
Correlator Demodulator
−113.2 dBm
−119.5 dBm
−114.2 dBm
−120 dBm
−113.2 dBm
−119.8 dBm
Rev. 0 | Page 24 of 48
preprogrammed word is compared to the received bit stream,
and the external pin INT/LOCK is asserted by the ADF7020-1
when a valid match is identified.
This feature can be used to alert the microprocessor that a valid
channel has been detected. It relaxes the computational require-
ments of the microprocessor and reduces the overall power
consumption. The INT/LOCK is automatically deasserted again
after nine data clock cycles.
The automatic sync/ID word detection feature is enabled by
selecting Demodulator Mode 2 or 3 in the demodulator set-up
register. Do this by setting R4_DB (25:23) = [010] or [011].
Bits R5_DB (4:5) are used to set the length of the sync/ID
word, which can be 12, 16, 20, or 24 bits long. The transmitter
must transmit the MSB of the sync byte first and the LSB last to
ensure proper alignment in the receiver sync byte detection
hardware.
For systems using FEC, an error tolerance parameter can also
be programmed that accepts a valid match when up to three bits
of the word are incorrect. The error tolerance value is assigned
in R5_DB (6:7).
FSK Sensitivity
at BER = 1E-3,
Linear Demodulator
−106.2 dBm
−109.2 dBm
−108.0 dBm
−110.1 dBm
−107.0 dBm
−109.0 dBm
ASK Sensitivity
at BER = 1E-3
−110.8
−116.8 dBm
−111.8 dBm
−118 dBm
−110.5 dBm
−116.8 dBm