Analog Devices ADRF5515A-EVALZ, User Manual

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User Guide UG-1891
EVALUATION BOARD HARDWARE
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CONTROL INPUTS
The ADRF5515A-EVALZ has four control inputs, as described in
Table 3 . Each control input is decoupled with a 100 pF capacitor.
When no connection is made to the control inputs, both channels
are in termination mode with LNAs operating in high gain mode.
Populating the 1 kΩ pull down resistors on the SWCTRL, BP_A,
BP_B, and PD test points result in the ADRF5515A turning on in
receive high gain mode.
Table 3. Control Inputs
Test Points
Description
BP_A Bypass LNA Stage 2 on Channel A
BP_B Bypass LNA Stage 2 on Channel B
PD Power down all LNA stages on Channel A and Channel B
SWCTRL Control switches on Channel A and Channel B
RF INPUTS AND OUTPUTS
The ADRF5515A-EVALZ has ten edge mounted SMA connectors
for the RF inputs and outputs, as shown in Table 4 . ANT_A and
ANT_B, and TERM_A and TERM_B, are dc-coupled, whereas the
RXO_x is ac
‑
coupled using a series capacitor of 10 pF close to the
SMA connector.
The SMA connectors and series components on the thru lines are
not populated by default and can be connected by the user to
measure and calibrate out the evaluation board loss effects. To
measure and calibrate out the evaluation board loss effects, the
user must connect these connectors and components. Use the thru
line on THRU1 and THRU2 to calibrate out the ANT_A or ANT_B
to TERM_A or TERM_B evaluation board loss. Use the thru line on
THRU3 and THRU4, which have 10 pF capacitors, to calibrate out
the RXO_A or RXO_B evaluation board loss.
Table 4. RF Inputs and Outputs
SMA Connectors
Description
ANT_A Antenna input to Channel A
ANT_B Antenna input to Channel B
TERM_A Termination output from Channel A
TERM_B Termination output from Channel B
RXO_A Receiver output from Channel A
RXO_B Receiver output from Channel B
THRU1 Thru line input or output, DNI
THRU2 Thru line input or output, DNI
THRU3 Thru line input or output, DNI
THRU4 Thru line input or output, DNI