ADF7020BCPZ Analog Devices Inc, ADF7020BCPZ Datasheet - Page 17

• Manufacturer Part Number: ADF7020BCPZ
• Description: IC TX FSK/ASK ISM BAND 48LFCSP
• Manufacturer: Analog Devices Inc

Specifications of ADF7020BCPZ

• 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: 19mA
• Current - Transmitting: 26.8mA @ 10dBm
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LFCSP
• Data Rate: 200Kbps
• Supply Voltage Range: 2.3V To 3.6V
• Logic Case Style: LFCSP
• No. Of Pins: 48
• Operating Temperature Range: -40°C To +85°C
• Msl: MSL 1 - Unlimited
• Termination Type: SMD
• 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-ADF7020DBZ3 - BOARD EVAL ADF7020 433-445MHZEVAL-ADF7020DBZ2 - BOARD EVAL ADF7020 862-870MHZEVAL-ADF7020DBZ1 - BOARD EVAL ADF7020 902-928MHZ
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant

VCO Bias Current
VCO bias current can be adjusted using Bit R1_DB19 to
Bit R1_DB16. To ensure VCO oscillation, the minimum bias
current setting under all conditions is 0xA.
LOOP FILTER
R1_DB[16:19]
VCO BIAS
CVCO PIN
220µF
Figure 24. Voltage-Controlled Oscillator (VCO)
VCO
÷2
DIVIDER
TO N
VCO SELECT BIT
÷2
MUX
TO PA
Rev. B | Page 17 of 48
CHOOSING CHANNELS FOR BEST SYSTEM
PERFORMANCE
The fractional-N PLL allows the selection of any channel within
868 MHz to 956 MHz (and 433 MHz using divide-by-2) to a
resolution of <300 Hz. This also facilitates frequency-hopping
systems.
Careful selection of the XTAL frequency is important to achieve
best spurious and blocking performance. The architecture of
fractional-N causes some level of the nearest integer channel to
couple directly to the RF output. This phenomenon is often
referred to as integer boundary spurious. If the desired RF channel
and the nearest integer channel are separated by a frequency of
less than the PLL loop bandwidth (LBW), the integer boundary
spurs are not attenuated by the loop.
Integer boundary spurs can be significantly reduced in ampli-
tude by choosing XTAL values that place the wanted RF
channel away from integer multiples of the PFD.
ADF7020