AD8342

Data Sheet

Rev. C | Page 22 of 25

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 61. The representations of the board layout are included

in Figure 62 through Figure 65.

R2

0Ω

R1

0Ω

C6

1000pF

C4

1000pF

C1

1000pF

C3

1000pF

C5

0.1µF

C2

0.1µF

VPOS

RF_IN

C7

1000pF

INLO

C8

1000pF

C9

0.1µF

C10

100pF

VPOS

R11

0Ω

R16

0Ω

R10

0Ω

R12

OPEN

Z4

OPEN

R4

OPEN

34

16

2

TC2-1T

Z2

OPEN

R3

OPEN

100Ω TRACES,

NO GROUND PLANE

IF_OUT+

IF_OUT–

R15

0Ω

T1

Z1

OPEN

Z3

OPEN

R5

100Ω

C14

OPEN

L1

0Ω

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

1.82kΩ

C11

100pF

R7

0Ω

C13

100pF

C12

0.1µF

VPOS

GND

PWDN

VPOS

W1

R8

10kΩ

R9

0Ω

PWDN

50Ω

TRACE

Figure 61. Evaluation Board

Table 7. Evaluation Board Configuration Options

Component

Description

Default Conditions

R1, R2, R7,

C2, C4, C5, C6, C9,

C10, C12, C13

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, C9, C12 = 0.1 μF

R3, R4

Options for a single-ended IF output circuit.

R3, R4 = Open

R6, C11

RBIAS resistor that sets the bias current for the mixer core. The capacitor 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 the PWDN pin.

R9 = 0 Ω

C3, R5, C14, L1

RF input. C3 provides a dc block for RF input. R5 provides a resistive input termination. C16

and L1 are provided for reactive matching of the input.

C3 = 1000 pF

R5 = 100 Ω

C14 = Open

L1 = 0 Ω

C1

RF common ac coupling. Provides a dc block for the RF input common connection.

C1 = 1000 pF

C8

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

C8 = 1000 pF

C7

LO common ac coupling. Provides a dc block for the LO input common connection.

C7 = 1000 pF

W1

Power down. The device is on when the PWDN pin is connected to ground via a 10 kΩ

resistor. The device is disabled when PWDN is connected to the positive supply (VS) via W1.

T1, R10, R11, R12,

R15, R16, Z3, Z4,

Z1, Z2,

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 supplies the bias voltage (VS) to the IF output pins.

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

Circuits®)

R12 = Open

R10, R11, R15, R16 = 0 Ω

Z3, Z4 = Open

Z1, Z2 = Open