Data Sheet

ADRF5019

Rev. 0 | Page 11 of 12

APPLICATIONS INFORMATION

LAYOUT CONSIDERATIONS

All measurements in this data sheet are measured on the

ADRF5019-EVALZ evaluation board. The design of the

ADRF5019-EVALZ board serves as a layout recommendation

for ADRF5019 application.

See the ADRF5019-EVALZ user guide for more information on

using the evaluation board.

BOARD LAYOUT

The ADRF5019-EVALZ is a 4-layer board. The outer copper

(Cu) layers are 0.7 mil to 2.2 mil plated and are separated by

dielectric materials. Figure 23 shows the ADRF5019-EVALZ

board stack up.

The board layout and stackup shown in Figure 23 are used to

make the measurements included in this data sheet.

Figure 23. ADRF5019-EVALZ Stack Up

All RF and dc traces are routed on the top copper layer. The

inner and bottom layers are ground planes that provide a solid

ground for the RF transmission lines. The top dielectric material

(H) is 10 mil Rogers RO4350, which allows optimal RF

performance. The middle and bottom dielectric layers provide

mechanical strength. The overall evaluation board thickness is

approximately 62 mil, which allows Subminiature Version A

(SMA) connectors to be connected at the board edges.

RF AND DIGITAL CONTROLS

The RF transmission lines use a coplanar waveguide (CPWG)

model with a width of 18 mil and a ground spacing (G) of 13 mil

and have a characteristic impedance of 50 Ω. For optimal RF

and thermal grounding, as many plated through vias as possible

are arranged around the transmission lines and under the

exposed pad of the package.

The RF input and output ports (RFC, RF1, and RF2) are

connected through 50 Ω transmission lines to the SMA

capacitor filters high frequency noise.

Figure 24 shows the simplified application circuit for the

ADRF5019.

Figure 24. Simplified Application Circuit

RO4350

1.5oz Cu (2.2mil)

1.5oz Cu (2.2mil)

0.5oz Cu (0.7mil)

0.5oz Cu (0.7mil)

1.5oz Cu (2.2mil)

1.5oz Cu (2.2mil)

W = 18mil

G = 13mil

T = 2.2mil

H = 10mil

12

100pF

11

10

1

3

4

9

2

ADRF5019

U1

GND

GND

RFC

RFC

GND

GND

LS

LS

RF2

RF1

100pF