ADL5355

Rev. 0 | Page 21 of 24

Table 8. Evaluation Board Configuration

Components

Description

Default Conditions

C2, C6, C8, C18, C19,

C20, C21

Power Supply Decoupling. Nominal supply decoupling consists of

a 10 μF capacitor to ground in parallel with a 10 pF capacitor to

ground positioned as close to the device as possible.

C2 = 10 μF (size 0603),

C6, C8, C20, C21 = 10 pF (size 0402),

C18, C19 = 100 pF (size 0402)

C1, C4, C5

RF Input Interface. The input channels are ac-coupled through C1.

C4 and C5 provide bypassing for the center taps of the RF input baluns.

C1 = 3 pF (size 0402), C4 = 10 pF (size 0402),

C5 = 0.01 μF (size 0402)

T1, C17, L4, L5,

R1, R24, R25

IF Output Interface. The open-collector IF output interfaces are

biased through pull-up choke inductors L4 and L5. T1is a 4:1

impedance transformer used to provide a single-ended IF output

interface, with C17 providing center-tap bypassing. Remove R1 for

balanced output operation.

T1 = TC4-1W+ (Mini-Circuits),

C17 = 150 pF (size 0402),

L4, L5 = 470 nH (size 1008),

R1, R24, R25 = 0 Ω (size 0402)

C10, C12, R4

LO Interface. C10 and C12 provide ac coupling for the LO1_IN and

LO2_IN local oscillator inputs. LOSEL selects the appropriate LO

input for both mixer cores. R4 provides a pull-down to ensure that

LO1_IN is enabled when the LOSEL test point is logic low.

LO2_IN is enabled when LOSEL is pulled to logic high.

C10, C12 = 22 pF (size 0402),

R4 = 10 kΩ (size 0402)

R21

PWDN Interface. R21 pulls the PWDN logic low and enables the

device. The PWR_UP test point allows the PWDN interface to be

exercised using the external logic generator. Grounding the

PWDN pin for nominal operation is allowed. Using the PWDN pin

when supply voltages exceed 3.3 V is not allowed.

R21 = 10 kΩ (size 0402)

C22, L3, R9, R14, R22,

R23, VGS0, VGS1

Bias Control. R22 and R23 form a voltage divider to provide 3 V

for logic control, bypassed to ground through C22. VGS0 and VGS1

jumpers provide programmability at the VGS0 and VGS1 pins. It is

recommended to pull these two pins to ground for nominal

operation. R9 sets the bias point for the internal LO buffers.

R14 sets the bias point for the internal IF amplifier.

C22 = 1 nF (size 0402), L3 = 0 Ω (size 0603),

R9 = 1.1 kΩ (size 0402), R14 = 910 Ω (size 0402),

R22 = 10 kΩ (size 0402), R23 = 15 kΩ (size 0402),

VGS0 = VGS1 = 3-pin shunt