Data Sheet

ADL5369

Rev. A | Page 21 of 23

Table 8. Evaluation Board Configuration

Components

Description

Default Conditions

C2, C6, C8,

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)

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 = 100 pF (Size 0402), C4 = 10 pF (Size 0402),

C5 = 0.01 μF (Size 0402)

T1, R1, C24, C25

IF output interface. T1 is a 1:1 impedance transformer used to provide

a single-ended IF output interface. Remove R1 for balanced output

operation. C24 and C25 are used to block the dc bias at the IF ports.

T1 = TC1-1-13M+ (Mini-Circuits),

R1 = 0 Ω (Size 0402),

C24, C25 = 560 pF (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 = 100 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 an 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.

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

R9 = 1.7 kΩ (Size 0402), R14 = 910 Ω (Size 0402),

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

VGS0 = VGS1 = 3-pin shunt