ADL5387ACPZ-R71 datasheet(15/28 Pages) AD

15 / 28 page

ADL5387

Rev. 0 | Page 15 of 28

APPLICATIONS INFORMATION

BASIC CONNECTIONS

Figure 47 shows the basic connections schematic for the ADL5387.

POWER SUPPLY

The nominal voltage supply for the ADL5387 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. 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

The LO port is driven in a single-ended manner. The LO signal

must be ac-coupled via a 1000 pF capacitor directly into LOIP,

and LOIN is ac-coupled to ground also using a 1000 pF capacitor.

The LO port is designed for a broadband 50 Ω match and

therefore exhibits excellent return loss from 100 MHz to 4 GHz.

The LO return loss can be seen in Figure 20. Figure 46 shows

the LO input configuration.

LO INPUT

LOIP

LOIN

1000pF

Figure 46. Single-Ended LO Drive

The recommended LO drive level is between −6 dBm and

+6 dBm. The LO frequency at the input to the device should be

twice that of the desired LO frequency at the mixer core. The

applied LO frequency range is between 100 MHz and 4 GHz.

RFC

120nH

1000pF 1000pF

100pF

0.1µF

1000pF

100pF

1000pF

0.1µF

VPOS

ETC1-1-13

ADL5387

VPA

COM

BIAS

VPL

VPB

QHI

QLO

IHI

ILO

VPB

QHI

QLO

IHI

ILO

Figure 47. Basic Connections Schematic for ADL5387

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