ADL5604

Rev. 0 | Page 15 of 24

APPLICATIONS INFORMATION

BASIC LAYOUT CONNECTIONS

The basic connections for operating the ADL5604 are shown in Figure 35.

RFIN

VBIAS

RFOUT

12

VCC2

11

VBIAS

10

RFIN

9

RFIN

1

2

3

4

13

8

14

7

15

6

16

5

ADL5604

GND1

GND GND GND GND

GND GND GND GND

VCC1

L1

16nH

VCC2

VBIAS

GND2

R9

0

Ω

R10

0

Ω

R6

0

Ω

R8

0

Ω

R3

OPEN

L2

OPEN

R4 OPEN

GND3

AD8009

C15

0.1µF

R1

301

Ω

–VS

+VS

U2

NOTE 1

C5

2.4pF

C2

22pF

R2

0

Ω

R5

0

Ω

NOTES

1. THE COMPONENTS CONTAINED INSIDE THE DASHED BOX ARE ONLY REQUIRED IF IT IS

DESIRED TO POWER DOWN THE ADL5604.

C1

0

Ω

C3

1.3pF

C4

2.7pF

C11

10nF

C12

0.1µF

C9

10nF

C10

0.1µF

C6

10nF

C7

0.1µF

C8

10µF

RFOUT

RFOUT

RFOUT

RFOUT

C14

0.1µF

Figure 35. Basic Connections

Power Supply

The voltage supply for the ADL5604, which ranges from 4.75 V

to 5.25 V, should be connected to the VCC1 pin. The dc bias to

the output stage is supplied through L1 and is connected to the

RFOUT pin. Three decoupling capacitors, C6, C7, and C8, are

used to prevent RF signals from propagating on the dc lines. The

VBIAS and VCC2 pins are connected to the main supply voltage,

VCC1, through the R2 and R5 resistors. Additional decoupling

capacitors, C9, C10, C11, and C12, are required on the VCC2

and VBIAS pins.

RF Input Interface

Pin 1 and Pin 2 are the RF input pins for ADL5604. The RF

input is easily matched with two or three components and a

microstrip line used as an inductor. If additional inductance is

required, C3 can be replaced with an inductor. See the ADL5604

Match section for the component values and spacing for the

different frequency bands.

RF Output Interface

Pin 9 to Pin 12 are used as the RF output pins. The C5 shunt

capacitor and the inductance from the microstrip line match RF

output to 50 Ω. See the ADL5604 Match section for the com-

ponent values and spacing for the different frequency bands.

Power-Down Circuit

Device U2 and its associated circuitry can be used to power

down the ADL5604. To connect U2, remove the R2 resistor and

place a 0 Ω resistor in place of R4.