ADL5506
Data Sheet
EVALUATION BOARD
Figure 51 shows the schematic of the ADL5506 evaluation board.
The board is powered by a single supply in the 2.5 V to 5.5 V range.
The power supply is decoupled by 100 pF and 0.1 μF capacitors.
Enable the device by switching SW1 to the on position.
LAND PATTERN AND SOLDERING INFORMATION
Pad diameters of 0.20 mm are recommended with a solder
mask opening of 0.30 mm. For the RF input trace, a trace width
of 0.30 mm is used, which corresponds to a 50 ꢀ characteristic
impedance for the dielectric material being used (FR4). All traces
going to the pads are tapered down to 0.15 mm. For the RFIN
line, the length of the tapered section is 0.20 mm.
The RF input has a broadband match of 50 Ω using a single
52.3 ꢀ resistor at R7. More precise matching at spot frequencies
is possible (see the Input Coupling Options section).
Table 6 details the various configuration options of the evaluation
board. Figure 52 shows the layout of the evaluation board.
SW1
VP
R4
0Ω
C7
(OPEN)
(P1 – B6)
R9
(P1 – B8)
R1
VP
R8
R10
P2
ADL5506
(OPEN)
(OPEN) (OPEN) (OPEN)
EN
1
2
3
CFLT
ENBL
VLOG
COMM
6
5
4
C3
(OPEN)
R3
0Ω
VPOS
VPOS
RFIN
VLOG
R2
C9
0.1µF
C2
0.1µF
C1
100pF
C4
(OPEN)
R5
(OPEN)
(OPEN)
(P1 – B4)
RFIN
R7
52.3Ω
R6
(OPEN)
(P1 – A1, B1)
VP
C8
(OPEN)
C6
100pF
C5
0.1µF
(P1 – B12)
Figure 51. Evaluation Board Schematic
Figure 52. Layout of Evaluation Board, Component Side
Table 6. Evaluation Board Configuration Options
Component
Description
Default Condition
VPOS, GND
Ground and supply vector pins.
Not applicable
C1, C2, C5, C6,
C7, C8, C9
Power supply decoupling. Nominal supply decoupling of 0.1 μF and 100 pF.
C1, C6 = 100 pF (Size 0402),
C2, C5, C9 = 0.1 μF (Size 0402),
C7 = C8 = open (Size 0805)
R7
RF input interface. The 52.3 Ω resistor at R7 combines with the ADL5506 internal input R7 = 52.3 Ω (Size 0402)
impedance to give a broadband input impedance of around 50 Ω.
C3, C4, R2, R3
Output filtering. The combination of the internal 100 Ω output resistance and C4 produce
a low-pass filter to reduce the output ripple of the VLOG output. The output can be
scaled down using the resistor divider pads, R2 and R3.
R3 = 0 Ω (Size 0402),
R2 = open (Size 0402),
C3, C4 = open (Size 0402)
SW1, R4, R10, P2 Device enable. When SW1 is set to the on position, the ENBL pin is connected to the
R4 = 0 Ω (Size 0402),
supply and the ADL5506 is in enable mode. When SW1 I set to the off position, the ENBL R10 = open (Size 0402),
pin is grounded (through the 0 Ω resistor), putting the device in power-down mode.
SW1= on position,
P2 = not installed
P1, R1, R5, R6,
R8, R9
Alternate interface. The end connector, P1, allows access to various ADL5506 signals.
These signal paths are only used during factory test and characterization.
P1 = not installed,
R1, R5, R6, R9 = open (Size 0402),
R8 = open (Size 0805)
Rev. A | Page 22 of 23
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