ADL5802

Rev. 0 | Page 27 of 32

EVALUATION BOARD

An evaluation board is available for the ADL5802. The standard evaluation board is fabricated using Rogers® RO3003 material. Each of

the RF, LO, and IF ports is configured for single-ended signaling via a balun transformer. The schematic for the evaluation board is shown

in Figure 73. Table 5 describes the various configuration options for the evaluation board. Layout for the board is shown in Figure 74 and

Figure 75.

GND

ENBL

LOIP LOIN

VPOS

GND

OP2+

RF1–

GND

RF1+

VPOS

OP1+

OP1–

GND

VPOS

14

21

22

23

24

5

ADL5802

GND

1

2

RF2–

GND

19

20

GND

GND VSET

GND

RF2+

OP2–

12

11

10

9

8

7

6

15

16

17

18

LON

ENBL1

VPOS

C11

C8

R19

C13

C14

T5

T3

C5

C12

R14

C15

T2

R2

R13

R12

R20

R22

R23

R9

R11

R1

C7

C10

R6

RF1

IF1P

R16

R15

R10

R21

R3

C9

C16

T4

C6

R7

IF2N

IF2P

RF2

VPOS

GND

VPOS1

IF1N

VPOS

3

4

VPOS

C1

L1

L2

C4

VPOS

VPOS

VPOS

T1

LO

LOP

C3

C2

R5

R4

VSET

C18

L4

L3

C17

VPOS

13

Figure 73. Evaluation Board Schematic

Table 5. Evaluation Board Configuration

Components

Function

Default Conditions

C1, C4, C6, C7, C8, C9,

C10, C11, C17, C18,

R10, R12, R19, R20,

R21

Power supply decoupling. Nominal supply decoupling

consists of a 0.01 µF capacitor to ground in parallel with 10

pF capacitors to ground, positioned as close to the device

as possible. Series resistors are provided for enhanced

supply decoupling using optional ferrite chip inductors.

C6, C7, C8 = 10 pF (size 0402)

C9, C10, C11 = 0.01 µF (size 0402)

C1, C4, C17, C18 = open (size 0402)

R10, R12, R19, R20, R21 = 0 Ω (size 0402)

C5, C12, C13, C14, T3,

T5, RF1, RF2

RF Channel 1 and RF Channel 2 input interfaces. Input

channels are ac-coupled through C5, C12, C13, and C14. T3

and T4 are 1:1 baluns used to interface to the 50 Ω

differential inputs.

C5, C12, C13, C14 = 100 pF (size 0402)

T3, T5 = TC1-1-13M+ (Mini-Circuits)

C15, C16, L1, L2, L3,

L4, R2, R3, R6, R7,

R13, R14, R15, R16,

R20, R21, T2, T4, IF1,

IF2

IF Channel 1 and IF Channel 2 output interfaces. The 200 Ω

open-collector IF output interfaces are biased through the

center taps of T2 and T4 4:1 impedance transformers. C15

and C16 provide local bypassing with R20 and R21 available

for additional supply bypassing. R6, R7, R13, R14, R15, and

R16 are provided for IF filtering and matching options.

C15, C16 = 100 pF (size 0402)

L1, L2, L3, L4 = open (size 0805)

R2, R3, R13, R14, R15, R16, R20, R21 = 0 Ω (size 0402)

R6, R7 = open (size 0402)

T2, T4 = TC4-1W+ (Mini-Circuits)

C2, C3, R4, R5, T1, LO

LO interface. C2 and C3 provide ac coupling for the local

oscillator input. T1 is a 1:1 balun to allow single-ended

interfacing to the differential 50 Ω local oscillator input.

C2, C3 = 1 nF (size 0402)

R4, R5 = open (size 0402)

T1 = TC1-1-13M+ (Mini-Circuits)

R1, R9, R11, ENBL1

Enable interface. The ADL5802 can be disabled using the 3-

pin ENBL1 header. The ENBL pin is pulled up to VPOS

through R9. R1 is provided as an optional termination for

the high impedance enable interface. If desired, the ENBL

pin can be driven by an external source through the ENBL

SMA connector.

R9 = 10 kΩ (size 0402); R1, R11 = open (size 0402)

Or R1 = 10 kΩ (size 0402);R9, R11 = open (size 0402)

Or R11 = 10 kΩ (size 0402); R1, R9 = open (size 0402)

ENBL1 = 3-pin header and shunt