EVAL-ADRF6820 Datasheet, PDF (3/20 Pages) Analog Devices – On-board USB for SPI control

EVAL-ADRF6820 User Guide
EVALUATION BOARD HARDWARE
The ADRF6820 evaluation board provides all of the support
circuitry required to operate the ADRF6820 in its various
modes and configurations. Figure 2 shows the typical bench
setup used to evaluate the performance of the ADRF6820.
POWER SUPPLY
The ADRF6820 evaluation board requires a quiet 6 V power
source. This 6 V power source feeds the power supply design on
the ADRF6820 evaluation board that consists of switches and
dc regulators. Via the switches and/or dc regulators, 3.3 V and
5.0 V power rails are provided to the main IC.
UG-652
RF INPUTS
The high isolation 2:1 RF switch and on-chip tunable RF balun
enable the ADRF6820 to support two single-ended, 50 Ω termi-
nated RF inputs. The 2:1 RF switch can be controlled serially via
the SPI port or in parallel via Switch S1. The default configuration
is parallel control using the switch. The operational frequency
range of the RF inputs is from 695 MHz to 2700 MHz; these
inputs should be ac-coupled.
GND
+6.0V PWR
USB CONNECTION
TO COMPUTER
DIFFERENTIAL
LO OUTPUT
RF INPUTS
DIFFERENTIAL
I AND Q
OUTPUTS
DIFFERENTIAL
LO INPUT
PLL REF
INPUT
Figure 2. ADRF6820 Typical Measurement Setup
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