ADF5000

Rev. 0 | Page 7 of 12

EVALUATION BOARD PCB

The evaluation board has four connectors as shown in Figure 8.

The RF input connector (J4) is a high frequency precision SMA

connector from Emerson. This connector is mechanically

compatible with SMA, 3.5 mm, and 2.92 mm cables.

Figure 8. Evaluation Board Silkscreen—Top View

The evaluation board is powered from a single 3.0 V to 3.6 V

supply, which should be connected to the J1 SMA connector.

The power supply can also be connected using the T3 (VDDx)

and T2 (GND) test points.

The differential RF outputs are brought out on the J2 and J3

SMA connectors. If only one of the outputs is being used, the

unused output should be correctly terminated using a 50 Ω

SMA termination.

The chip enable (CE) pin can be controlled using the T1 test

point. If this function is not required, the test point can be left

unconnected.

PCB MATERIAL STACK-UP

The evaluation board is built using Rogers RO4003C material

(0.008 inch). RF track widths are 0.015 inch to achieve a controlled

50 Ω characteristic impedance. The complete printed circuit

board (PCB) stack-up is shown in Figure 9.

FR4 PREPREG

0.0372”

0.5oz (18µm) FINISHED COPPER

ROGERS RO4003C LAMINATE 0.008”

ε

1.5oz (53µm) FINISHED COPPER

0.5oz (18µm) FINISHED COPPER

1.5oz (53µm) FINISHED COPPER

ROGERS RO4003C LAMINATE 0.008”

ε

0.062” ± 0.003”

COPPER TO COPPER

Figure 9. Evaluation Board PCB Layer Stack-Up

BILL OF MATERIALS

Table 4.

Qty.

Reference Designator

Description

Supplier

Part Number

1

C1

0.1 µF, 0603 capacitor

Murata

GRM188R71H104KA93D

1

C2

10 pF, 0402 capacitor

Murata

GRM1555C1H100JZ01D

3

J1, J2, J3

SMA RF connector

Emerson

142-0701-851

1

J4

SMA RF connector

Emerson

142-0761-801

3

T1, T2, T3

Test points

Vero

20-2137

1

U1

ADF5000 RF prescaler

Analog Devices, Inc.

ADF5000BCPZ