ADL5323-EVAL AD [Analog Devices], ADL5323-EVAL Datasheet - Page 8

• Manufacturer Part Number: ADL5323-EVAL
• Description: 1700 MHz to 2400 MHz GaAs Matched RF PA Predriver
• Manufacturer: AD [Analog Devices]

ADL5323
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.
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.
Figure 13. Recommended Land Pattern
RFIN
VCC
AGND
C1
10µF
100pF
C4
AGND
C3
10nF
C2
100pF
AGND
AGND
5
6
7
8
Figure 16. Basic Connections
VCC
GND
GND
RFIN
Rev. 0 | Page 8 of 12
ADL5323
EP
RFOUT
GND
VCC
VCC
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.
4
3
2
1
Figure 15. WCDMA ACP vs. Output Power, Single Carrier, Test Model 1-64
Figure 14. Spectrum of Single WCDMA Carrier Centered at 2140 MHz;
–100
–110
–115
–55
–60
–65
–70
–75
–80
–15
–20
–30
–40
–50
–60
–70
–80
–90
–15
CENTER 2.14GHz
AGND
AGND
AGND
C6
100pF
C9
100pF
–10
Carrier Power = 0 dBm, ACPR = −74 dBc
100pF
C5
AGND
AGND
C7
10nF
C10
10nF
–5
OUTPUT POWER (dBm)
RBW = 30kHz
VBW = 300kHz
SWT = 2s
RF ATT = 10dB
CH PWR = 0dBm
ACP UP = –74.2dBc
ACP LOW = –73.9dBc
1.46848MHz/
0
C8
10µF
AGND
C11
10µF
AGND
5
RFOUT
VCC
VCC
10
SPAN 14.6848MHz
15
20