ADL5565

Rev. 0 | Page 24 of 28

Table 15. Evaluation Board Configuration Options

Component

Description

Default Condition

VPOS, GND

Ground and supply vector pins.

VPOS, GND = installed

C3, C4, C5,

C6, C7, C11

Power supply decoupling. The supply decoupling consists of a 10 μF capacitor (C3) to

ground. C4 to C7 are bypass capacitors. C11 ac couples VREF to ground.

C3 = 10 μF (Size D),

C4, C5, C6, C7, C11 = 0.1 μF (Size 0402)

J1, J2, R1, R2,

R3, R4, R5, R6,

R12, R13, C1,

C2, C12, T1

Input interface. The SMA labeled J1 is the input. T1 is a 1-to-1 impedance ratio balun

to transform a single-ended input into a balanced differential signal. Removing R13,

installing R12 (0 Ω), and installing an SMA connector (J2) allows driving from a

differential source. C1 and C2 provide ac coupling. C12 is a bypass capacitor. R1 and

R2 provide a differential 50 Ω input termination. R3 to R6 are used to select the input

for the pin-strappable gain. The maximum gain is R3, R4, R5, R6 = 0 Ω and R1 and R2 =

open. The middle gain is R5 and R6 = 0 Ω, R3 and R4 = open, and R1 and R2 = 50 Ω. The

minimum gain is R3 and R4 = 0 Ω, R5 and R6 = open, and R1 and R2 = 33.2 Ω.

J1 = installed, J2 = not installed,

R1, R2 = open,

R3, R4, R5, R6, R13 = 0 Ω (Size 0402),

R12, = open,

C1, C2 = 0.01 μF (Size 0402),

C12 = open,

T1 = ETC1-1-13 (M/A-COM)

J3, J4, R7, R8,

R9, R10, R11,

R14, R15 C9,

C10, C13, T2

Output interface. The SMA labeled J3 is the output. T2 is a 1-to-1 impedance ratio balun

to transform a balanced differential signal to a single-ended signal. Removing R14,

installing R15 (0 Ω), and installing an SMA connector (J4) allows differential loading. C13 is

a bypass capacitor. R7, R8, R9, and R10 are provided for generic placement of matching

components. The evaluation board is configured to provide a 200 Ω to 50 Ω impedance

transformation with an insertion loss of 17 dB. C9 and C10 provide ac coupling.

J3 = installed, J4 = not installed,

R7, R8 = 84.5 Ω (Size 0402),

R9, R10 = 34.8 Ω (Size 0402),

R11, R15 = open (Size 0402),

R14 = 0 Ω (Size 0402)

C9, C10 = 0.01 μF (Size 0402),

C13 = open

T2 = ETC1-1-13 (M/A-COM)

ENBL, P1, C8

Device enabled. C8 is a bypass capacitor. When the P1 jumper is set toward the VPOS label,

the ENBL pin is connected to the supply, enabling the device. In the opposite direction,

toward the GND label, the ENBL pin is grounded, putting the device in power-down mode.

ENBL, P1 = installed,

C8 = 0.1 μF (Size 0402)

Table 16. Differential Values for Figure 44

Gain (dB)

R1 (Ω)

R2 (Ω)

6

29

29

12

33

33

15.5

Open

Open

Table 17. Alternative Differential Input Configuration for Figure 44

Gain (dB)

R1 and R2 (Ω)

C12 (μF)

C1 and C2 (Ω)

T1

6

Open

0.1

0

Mini Circuits TC4-1W+

12

Open

0.1

0

Mini Circuits TC2-1T+

15.5

Open

0.1

0

Mini Circuits TC1.5-52T+