ADL5606-EVALZ AD [Analog Devices], ADL5606-EVALZ Datasheet - Page 16

• Manufacturer Part Number: ADL5606-EVALZ
• Description: 1800 MHz to 2700 MHz
• Manufacturer: AD [Analog Devices]

ADL5606
EVALUATION BOARD
The schematic of the
Figure 36. The evaluation board uses 25 mils wide, 50 Ω traces
and is made from IS410 material with a 20 mils gap to ground.
The evaluation board is tuned for operation at 2140 MHz. The
inputs and outputs should be ac-coupled with appropriately
sized capacitors; therefore, for low frequency applications, the
value of C1 and C2 may need to be increased. DC bias is
provided to the output stage via an inductor (L1) connected
to the RFOUT pin. A bias voltage of 5 V is recommended.
Table 8. Evaluation Board Configuration Options, 2140 MHz Frequency Tuning Band
Component
C1, C2
C3, C4, C5, C6, C7,
C8, C9, C10, C11,
C12, C13, C14
C
C
L1
R1, R2, R4, R5
Exposed Paddle
IN
OUT
VCC3
OPEN
Function/Notes
Input/output dc blocking capacitors.
Power supply decoupling capacitors. Power supply decoupling capacitors are required to
filter out the high frequency noise on the power supply. The smallest capacitor should be the
closest to the ADL5606. The main bias that goes through RFOUT is the most sensitive to noise
because the bias is connected directly to the RF output. For the 1960 MHz and 2140 MHz
frequency tuning bands, Capacitors C12, C13, and C14 are open; for the 2630 MHz frequency
tuning band, it is recommended that the bypassing capacitors be added as follows:
C12 = 100 pF, C13 = 0.01 μF, and C14 = 10 μF.
Input matching capacitor. To match the
Shunt Capacitor C
can take the place of the microstrip line.
Output matching capacitor. C
strip line can act as inductance for the matching network (see Table 7). If space is at a premium,
an inductor can take the place of the microstrip line. A short length of low impedance line on
the output is embedded in the match.
The main bias for the
impedance for the frequency of operation while providing low resistance for the dc current.
The evaluation board uses a Coilcraft® 0603HP-18NX_LU inductor; this 18 nH inductor provides
some of the match at 2140 MHz.
To provide bias to all stages through just one supply, set R1 and R2 to 0 Ω, and leave R4 and
R5 open. To provide separate bias to stages, set R1 and R2 to open and R4 and R5 to 0 Ω.
The paddle should be connected to both thermal and electrical ground.
R4
ADL5606
R1
0Ω
DISABLE
VCC2
RFIN
OPEN
evaluation board is shown in
R5
C10
OPEN
C11
10µF
IN
is required at a distance of 268 mils. If space is at a premium, an inductor
C4
OPEN
20pF
C1
ADL5606
Figure 36. Evaluation Board, 2140 MHz Frequency Tuning Band
C6
0.01µF
C14
OPEN
C3
10pF
OUT
C
1.3pF
IN
comes through L1 to the output stage. L1 should be high
C5
100pF
C13
OPEN
is set at a specific distance from the device so that the micro-
C12
OPEN
ADL5606
Rev. 0 | Page 16 of 20
R2
0Ω
1
2
3
4
RFIN
DISABLE
VCC
VBIAS
NC
NC
16
5
at the 2140 MHz frequency tuning band,
ADL5606
NC
NC
15
6
The evaluation board has a short, non-50 Ω line on its output to
accommodate the four output pins and to allow for easier low
inductance output matching. The pads for Pin 9 to Pin 12 are
included on this microstrip line and are included in all matches.
The evaluation board uses numbers as identifiers to aid in the
placement of matching components at both the RF input and
RF output of the device. Figure 37 and Figure 38 show images
of the board layout.
NC
NC
14
7
RFOUT
RFOUT
RFOUT
RFOUT
NC
NC
13
8
11
10
12
9
VCC1
0.01µF
100pF
L1
18nH
10µF
C7
C8
C9
3.9pF
C
OUT
20pF
C2
RFOUT
Default Value
C1, C2 = 20 pF
C3 = 10 pF
C5, C7 = 100 pF
C6, C8 = 0.01 μF
C9, C11 = 10 μF
C4, C10, C12, C13,
C14 = open
C
C
L1 = 18 nH
R1, R2 = 0 Ω
R4, R5 = open
IN
OUT
= 1.3 pF HQ
= 3.9 pF HQ