ADL5323

Rev. 0 | Page 8 of 12

BASIC CONNECTIONS

Figure 16 shows the basic connections for operating the

ADL5323. Each of the three power supply lines should be

decoupled with 10 μF, 10 nF, and 100 pF capacitors. Pin 3, Pin 6,

Pin 7, and the exposed paddle under the device should all be

connected to a low impedance ground plane. If multiple ground

planes are being used, these should be stitched together with

vias under the device to optimize thermal conduction. See the

recommended land pattern in Figure 13 for more information.

Figure 13. Recommended Land Pattern

WCDMA DRIVING APPLICATION

Figure 14 shows a plot of the spectrum of an ADL5323 driving a

single carrier WCDMA signal (Test Model 1-64) at 0 dBm,

centered at 2140 MHz. At 5 MHz offset, an adjacent channel

power ratio of −74 was measured.

–15

–115

CENTER 2.14GHz

SPAN 14.6848MHz

1.46848MHz/

–50

–60

–70

–80

–90

–100

–30

–40

–20

–110

RBW = 30kHz

VBW = 300kHz

SWT = 2s

RF ATT = 10dB

CH PWR = 0dBm

ACP UP = –74.2dBc

ACP LOW = –73.9dBc

Figure 14. Spectrum of Single WCDMA Carrier Centered at 2140 MHz;

Carrier Power = 0 dBm, ACPR = −74 dBc

Figure 15 shows how ACP varies with output power level. Note

that in this plot, the noise floor of the spectrum analyzer was

factored out.

–55

–80

–15

OUTPUT POWER (dBm)

20

–60

–65

–70

–75

–10

–5

0

5

10

15

Figure 15. WCDMA ACP vs. Output Power, Single Carrier, Test Model 1-64

AGND

AGND

AGND

AGND

VCC

RFIN

RFOUT

ADL5323

VCC

VCC

GND

GND

RFIN

VCC

GND

RFOUT

C4

100pF

EP

8

7

6

5

1

2

3

4

AGND

C2

100pF

C1

10µF

C3

10nF

C5

100pF

VCC

VCC

AGND

AGND

AGND

C11

10µF

C9

100pF

C10

10nF

AGND

AGND

AGND

C8

10µF

C6

100pF

C7

10nF

Figure 16. Basic Connections