ADL5323 Data Sheet
Rev. A | Page 8 of 12
BASIC CONNECTIONS
Figure 17 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 14 for more information.
Figure 14. Recommended Land Pattern
WCDMA DRIVING APPLICATION
Figure 15 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
(dBm)
1.46848MHz/
–50
–60
–70
–80
–90
–100
–30
–40
06058-014
–20
–110
RBW = 30kHz
VBW = 300kHz
SWT = 2s
RF ATT = 10dB
CH PWR = 0dBm
ACP UP = –74.2dBc
ACP LOW = –73.9dBc
Figure 15. Spectrum of Single WCDMA Carrier Centered at 2140 MHz;
Carrier Power = 0 dBm, ACPR = −74 dBc
Figure 16 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)
ACP @ 5 MHz CARRIER OFFSET (dBc)
20
–60
–65
–70
–75
–10 –5 0 5 10 15
06058-015
Figure 16. WCDMA ACP vs. Output Power, Single Carrier, Test Model 1-64
AGNDAGNDAGND
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
AGNDAGNDAGND
C11
10µF
C9
100pF
C10
10nF
AGNDAGNDAGND
C8
10µF
C6
100pF
C7
10nF
06058-012
Figure 17. Basic Connections
