ADL5811ACPZ-R7 datasheet(25/28 Pages) AD

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ADL5811

Rev. 0 | Page 25 of 28

EVALUATION BOARD

An evaluation board is available for the ADL5811. The standard

evaluation board schematic is presented in Figure 61. The USB

interface circuitry schematic is presented in Figure 64. The

evaluation board layout is shown in Figure 62 and Figure 63.

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.

LOIP

LOIN

DATA

CLK

RFCT

RFIN

ADL5811

PAD

VCC

RED

BLK

VCC

C23

10pF

C17

22pF

100pF

22pF

120pF

C18

10pF

0.1µF

120pF

0.1µF

VCC

C19

10pF

VCC

C20

10pF

VPOS

AGND

LOIP

RFIN

IFON

IFOP

DATA

CLK

R20

OPEN

R21

0Ω

910Ω

TC4-1W+

470nH

Figure 61. Evaluation Board Schematic

Table 12. Evaluation Board Configuration

Components

Description

Default Conditions

C1, C2, C8, C18, C19,

C20, C23

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 = 0.1 μF (size 0402),

C8, C18, C19, C20, C23 = 10 pF (size 0402)

C6, C7, RFIN

RF input interface. The input channel is ac-coupled through C6.

C7 provides bypassing for the center tap of the RF input balun.

C6 = 22 pF (size 0402), C7 = 100 pF (size 0402)

C3, C4, C5, L1, L2,

R20, R21, T1, IFOP,

IFON

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

biased through pull-up choke inductors, L1 and L2. T1 is a 4:1

impedance transformer used to provide a single-ended IF output

interface, with C5 providing center-tap bypassing. Remove R21 for

balanced output operation.

C3, C4, C5 = 120 pF (size 0402),

L1, L2 = 470 nH (size 0603),

R20 = open,

R21 = 0 Ω (size 0402),

T1 = TC4-1W+ (Mini-Circuits®)

C17, LOIP

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

C17 = 22 pF (size 0402)

Bias control. R1 sets the bias point for the internal IF amplifier.

R1 = 910 Ω (size 0402)

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