ADL5382ACPZ-R7 datasheet(14/28 Pages) AD

14 / 28 page

ADL5382

Rev. 0 | Page 14 of 28

APPLICATIONS INFORMATION

BASIC CONNECTIONS

Figure 41 shows the basic connections schematic for the ADL5382.

POWER SUPPLY

The nominal voltage supply for the ADL5382 is 5 V and is

applied to the VPA, VPB, VPL, and VPX pins. Ground should

be connected to the COM, CML, and CMRF pins. The exposed

paddle on the underside of the package should also be soldered

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 Application Note AN-772 discusses the

thermal and electrical grounding of the LFCSP in detail. Each

of the supply pins should be decoupled using two capacitors;

recommended capacitor values are 100 pF and 0.1 μF.

LOCAL OSCILLATOR (LO) INPUT

For optimum performance, the LO port should be driven

differentially through a balun. The recommended balun is

the M/A-COM ETC1-1-13. The LO inputs to the device should

be ac-coupled with 1000 pF capacitors. The LO port is designed

for a broadband 50 Ω match from 700 MHz to 2.7 GHz. The

LO return loss can be seen in Figure 20. Figure 40 shows the LO

input configuration.

LO INPUT

ETC1-1-13

LOIP

LOIN

1000pF

Figure 40. Differential LO Drive

The recommended LO drive level is between −6 dBm and +6 dBm.

The applied LO frequency range is between 700 MHz and 2.7 GHz.

33nH

100pF

0.1µF

100pF

1000pF

0.1µF

VPOS

ADL5382

VPA

COM

BIAS

VPL

VPB

QHI

QLO

IHI

ILO

VPB

QHI

QLO

IHI

ILO

1000pF

RFC

ETC1-1-13

1000pF

ETC1-1-13

Figure 41. Basic Connections Schematic

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