AD8342

Rev. 0 | Page 19 of 20

EVALUATION BOARD

An evaluation board is available for the AD8342. The evaluation board is configured for single-ended signaling at the IF output port via a

balun transformer. The schematic for the evaluation board is presented in Figure 53.

R2

0

Ω

R1

0

Ω

C6

1000pF

C4

1000pF

C1

1000pF

C3

1000pF

C5

0.1

µF

C2

0.1

µF

VPOS

RF_IN

C7

1000pF

INLO

C8

1000pF

C9

0.1

µF

C10

100pF

VPOS

R11

0

Ω

R16

0

Ω

R10

0

Ω

R12

OPEN

Z4

OPEN

R4

OPEN

34

16

2

TC2-1T

Z2

OPEN

R3

OPEN

100

Ω TRACES,

NO GROUND PLANE

IF_OUT+

IF_OUT–

R15

0

Ω

T1

Z1

OPEN

Z3

OPEN

R5

100

Ω

C14

OPEN

L1

0

Ω

COMM

IFOP

IFOM

COMM

COMM

RFCM

RFIN

VPMX

VPDC PWDN EXRB COMM

VPLO LOCM

LOIN COMM

DUT

12

11

10

9

13

14

15

16

1

2

3

4

8

7

6

5

R6

1.82k

Ω

C11

100pF

R7

0

Ω

C13

100pF

C12

0.1

µF

VPOS

GND

PWDN

VPOS

W1

R8

10k

Ω

R9

0

Ω

PWDN

50

Ω

TRACE

Figure 53. Evaluation Board

Table 6. Evaluation Board Configuration Options

Component

Function

Default Conditions

R1, R2, R7,

C2, C4, C5, C6, C10

C12, C13, C14, C9

Supply decoupling. Shorts or power supply decoupling resistors and filter

capacitors.

R1, R2, R7 = 0 Ω

C4, C6 = 1000 pF

C10, C13 = 100 pF

C2, C5, C12, C9 = 0.1 µF

R3, R4

Options for single-ended IF output circuit.

R3, R4 = Open Ω

R15, 16

R15, R16 = 0 Ω

R6, C11

provides ac bypass for R6.

R6 = 1.82 kΩ

C11 = 100 pF

R8

Pull down for the PWDN pin.

R8 = 10 kΩ

R9

Link to PWDN pin.

R9 = 0 Ω

C3, R5, C16, L1

RF input. C3 provides dc block for RF input. R5 provides a resistive input

termination. C16 and L1 are provided for reactive matching the input.

C3 = 1000 pF

R5 = 100 Ω

C14 = Open

L1 = 0 Ω

C1

RF common ac coupling. Provides dc block for RF input common

connection.

C1 = 1000 pF

C8

C7

LO input ac coupling. Provides dc block for the LO input.

LO common ac coupling. Provides dc block for LO input common

connection.

C7, C8 = 1000 pF

W1

Power down. The part is on when the PWDN is connected to ground via a

10 kΩ resistor. The part is disabled when PWDN is connected to the positive

T1, R12, R11, Z3,

Z4, Z1, Z2, R10

IF output interface. T1 converts a differential high impedance IF output to

single-ended. When loaded with 50 Ω, this balun presents a 100 Ω load to

the mixers collectors. The center tap of the primary is used to supply the

T1 = TC2-1T, 2:1 (Mini-Circuits)

R12 = Open Ω

R10, R11 = 0 Ω

Z3, Z4 = Open

Z1, Z2 = Open