REV.PrA 01/00

–2–

EVAL-ADF4213EB2

Figure 1. Evaluation Board Silkscreen

Figure 2. PC Cable Diagram

1

2

3

7

8

9

11

12

14

15

16

17

18

19

20

21

22

23

24

25

1

2

3

4

5

6

7

8

9

Black - CLK

Brown - DATA

Red - LE

Orange - CE

25 Way Male

D-Type

To

PC Printer Port

9 Way

Female D-Type

To

ADF411X

ADF421X

Evaluation

Board

PC

EVAL-ADF411X

EVAL-ADF421X

White - GND

6

4

5

Blue

Purple

Yellow

13

10

Hardware Description

The evaluation board comes with a cable for connecting to

the printer port of a PC. The silk screen and cable diagram for

the evaluation board are shown below. The board schematic is

shown on pages 3 and 4.

The board is powered from a single 9V battery.

The

power supply ciruitry allows the user to choose either 3V

supply.

vice.

All components necessary for LO generation are on-

board.

The 19.2 MHz TCXO from Vectron provides the

necessary Reference Input.

The PLL on the RF side is

made up of the ADF4213, passive loop filter (20kHz

bandwidth) and the VCO 190-2350 from Vari-L. The

PLL on the IF consistes of the ADF4213, passive loop

filter (20kHz bandwidth) and the VCO 190-775.

The

respective outputs are available at RFOUTand IFOUT

through standard SMA connectors. If the user wishes they

may use their own power supplies and reference input.

In

this case, they need to insert SMA connectors to as shown

on the silkscreen and block diagram.

The AD7706 A/D converter is used to monitor the power

supply voltage and current consumption of the ADF4213.

This helps the user pick the optimum synthesizer settings

for power consumption and also provides an alert if the

battery voltage is too low to sustain the required 3V or 5V

for the board supply.

The RF loop component values are for a 2.35GHz output,

with 5mA CP current, VCO 190-2350T, 200kHz channel

spacing and 20kHz loop band-width.

The component values for the IF side are for a 760MHz

output, 5mA CP current, VCO190-775T, 200kHz chan-

nel spacing and 20kHz loop band-width.