ADL5322

Rev. 0 | Page 8 of 12

BASIC CONNECTIONS

Figure 14 shows the basic connections for operating the

ADL5322. 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

recommended land pattern in Figure 12.

Figure 12. Recommended Land Pattern

CDMA2000 DRIVING APPLICATION

Figure 13 shows a plot of the spectrum of an ADL5323 driving

at 4-carrier CDMA2000 signal at 0 dBm per carrier (total

carrier power = 6 dBm), centered at 880 MHz. At 750 kHz

and 1.98 MHz offset, adjacent channel power ratios of −59 dBc

and −84 dBc (measured in 30 kHz with respect to the 1.22 MHz

carrier) are observed. At 4 MHz carrier offset, −73 dBc is

measured in a 1 MHz bandwidth (−133 dBm/Hz). Note that

the spectrum of the four carriers is slightly rounded due the

frequency response of the cavity-tuned filter that was used to

filter out the noise and distortion of the source signal.

–10

–110

CENTER 881.875MHz

SPAN 10MHz

1MHz/

–50

–60

–70

–80

–90

–100

–20

–30

–40

RBW = 30kHz

VBW = 300kHz

SWT = 2s

RF ATT = 20dB

MIXER = –10dBm

CH PWR = 0.26dBm

ACP UP = –59.33dB

ALT1 UP = –84.35dB

ALT2 UP = –72.74dB

Figure 13. Spectrum of 4 Adjacent CDMA2000 Carriers Centered at 880 MHz;

Total Carrier Power = 6 dBm (0 dBm per Carrier)

AGND

AGND

AGND

AGND

VCC

RFIN

RFOUT

ADL5322

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 14. Basic Connections