ADL5812

Rev. 0 | Page 25 of 28

EVALUATION BOARD

An evaluation board is available for the ADL5812. The standard

evaluation board schematic is presented in Figure 62. The USB

interface circuitry schematic is presented in Figure 65. The

evaluation board layout is shown in Figure 63 and Figure 64.

The evaluation board is fabricated using Rogers® 3003 material.

Table 12 details the configuration for the mixer characterization.

The evaluation board software is available on www.analog.com.

VCC

RED

BLK

VPOS

AGND

C25

22pF

C24

22pF

RFIN2

C17

22pF

RFIN2

C6

22pF

RFIN1

30

29

28

27

26

25

24

23

22

21

1

PAD

VCC

VCC

VCC

VCC

C3

120pF

C4

120pF

C2

0.1µF

C13

10pF

VCC

C14

10pF

C12

10pF

C11

10pF

C5

120pF

C8

0.1µF

C7

22pF

C2.3

10pF

3

4

6

2

1

C1

0.1µF

IFON

IFOP

R20

OPEN

R21

0Ω

R1

910Ω

T1

TC4-1W+

L1

470nH

L2

470nH

VCC

VCC

VCC

VCC

VCC

C3

120pF

C4

120pF

C27

0.1µF

C20

10pF

C19

10pF

C18

10pF

C16

22pF

C15

10pF

C30

120pF

3

4

6

2

1

C26

0.1µF

IFON

IFOP

R23

OPEN

R22

0Ω

R2

910Ω

T1

TC4-1W+

L3

470nH

L4

470nH

RF1

RFCT1

NC

NC

NC

NC

NC

NC

RFCT2

RF2

V1LO1

NC

NC

NC

LOIP

LOIN

LE

DATA

CLK

LE

DATA

CLK

V2LO1

ADL5812

2

3

4

5

6

7

8

9

10

Figure 62. Evaluation Board Schematic

Table 12. Evaluation Board Configuration

Components

Description

Default Conditions

C1, C2, C8, C11, C12,

C13, C14, C15, C18,

C19, C20, C23, C26,

C27

Power supply decoupling. Nominal supply decoupling consists of a

0.1 μF capacitor to ground in parallel with a 10 pF capacitor to

ground positioned as close to the device as possible.

C1, C2, C26, C27 = 0.1 μF (size 0402),

C8, C11, C12, C13, C14, C15, C18, C19,

C20, C23 = 10 pF (size 0402)

C6, C7, C24, C25

RF input interface. The input channels are ac-coupled through C6 and

C24. C7 and C25 provide bypassing for the center tap of the RF input

baluns.

C6, C24 = 22 pF (size 0402),

C7, C25 = 22 pF (size 0402)

C3, C4, C5, C28, C29,

C30, L1, L2, L3, L4,

R20, R21, R22, R23,

T1, T2

IF output interface. The open-collector IF output interfaces are biased

through pull-up choke inductors L1, L2, L3, and L4. T1 and T2 are 4:1

impedance transformers used to provide single-ended IF output

interfaces, with C5 and C30 providing center-tap bypassing. Remove

R21 and R22 for balanced output operation.

C3, C4, C5, C28, C29, C30 = 120 pF (size 0402),

L1, L2, L3, L4 = 470 nH (size 0603),

R20, R23 = open,

R21, R22 = 0 Ω (size 0402),

T1, T2 = TC4-1W+ (Mini-Circuits®)

C17

LO interface. C17 provides ac coupling for the LOIP local oscillator input.

C17 = 22 pF (size 0402)

R1, R2

Bias control. R1and R2 set the bias point for the internal IF amplifier.

R1, R2 = 910 Ω (size 0402)