ADL5380ACPZ-WP View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'ADL5380ACPZ-WP' PDF : 36 Pages View PDF
ADL5380
APPLICATIONS INFORMATION
BASIC CONNECTIONS
Figure 78 shows the basic connections schematic for the ADL5380.
POWER SUPPLY
The nominal voltage supply for the ADL5380 is 5 V and is
applied to the VCC1, VCC2, and VCC3 pins. Connect ground
to the GND1, GND2, GND3, and GND4 pins. Solder the exposed
paddle on the underside of the package to a low thermal and
electrical impedance ground plane. If the ground plane spans
multiple layers on the circuit board, these layers should be stitched
together with nine vias under the exposed paddle. The AN-772
Application Note discusses the thermal and electrical grounding
of the LFCSP in detail. Decouple each of the supply pins using
two capacitors; recommended capacitor values are 100 pF and 0.1 μF.
LOCAL OSCILLATOR (LO) INPUT
For optimum performance, drive the LO port differentially
through a balun. The recommended balun for each performance
level includes the following:
• Up to 3 GHz is the Mini-Circuits TC1-1-13.
• From 3 GHz to 4 GHz is the Johanson Technology
3600BL14M050.
• From 4.9 GHz to 6 GHz is the Johanson Technology
5400BL15B050.
AC couple the LO inputs to the device with 100 pF capacitors.
The LO port is designed for a broadband 50 Ω match from
400 MHz to 6 GHz. The LO return loss can be seen in Figure 19.
Figure 77 shows the LO input configuration.
LO INPUT
BALUN
9 LOIP
100pF
10 LOIN
100pF
Figure 77. Differential LO Drive
The recommended LO drive level is between −6 dBm and +6 dBm.
The applied LO frequency range is between 400 MHz and 6 GHz.
RFIN
BALUN
IHI
ILO
VS
0.1µF
VS
0.1µF
100pF
100pF
100pF
RADJ
VS
24 23 22 21 20 19
100pF
1 GND3
2 GND1
3 IHI
4 ILO
5 GND1
6 VCC1
7
ADL5380
GND3 18
GND2 17
QHI 16
QLO 15
GND2 14
VCC2 13
8 9 10 11 12
100pF
QHI
QLO
VS
0.1µF
100pF
BALUN
100pF
LO_SE
Figure 78. Basic Connections Schematic
Rev. 0 | Page 23 of 36
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