Power Supply

The MAX7033 can operate from 3.3V or 5V supplies.

For 5V operation, remove JU7 before connecting the

supply to VDD. For 3.3V operation, connect JU7.

IF Input/Output

The 10.7MHz IF can be monitored with the help of a

spectrum analyzer using the MIX_OUT SMA (not provid-

ed). Remove the ceramic filter for such a measurement

and include R3 (270

Ω) and C17 (0.01µF) to match the

330

Ω mixer output with the 50Ω spectrum analyzer.

Jumper JU3 needs to connect pins 1 and 2. It is also

possible to use the MIX_OUT SMA to inject an external

IF as a means of evaluating the baseband data slicing

section. Jumper JU3 needs to connect pins 2 and 3.

F_IN External Frequency Input

For applications where the correct frequency crystal is

not available, it is possible to directly inject an external

frequency through the F_IN SMA (not provided).

Connect the SMA to a function generator. The addition

of C18 and C19 is necessary (use 0.01µF capacitors).

AGC Control

Jumper JU5 controls whether the AGC is enabled.

Connect pins 2 and 3 to enable the AGC. In addition,

by removing the jumper, the AGC setting can be

locked or unlocked by transitioning the AC pin while the

SHDN pin is high.

Crystal Select

Jumper JU2 controls the crystal-divide ratio.

Connecting pins 1 and 2 sets the divide ratio to 32,

while connecting pins 2 and 3 sets the ratio to 64. This

determines the frequency of the crystal to be used.

Image-Rejection Frequency Select

A unique feature of the MAX7033 is its ability to vary at

which frequency the image rejection is optimized. JU6

allows the selection of three possible frequencies:

315MHz, 375MHz, and 433.92MHz. See Table 1

for settings.

Test Points and I/O Connections

Additional test points and I/O connectors are provided

to monitor the various baseband signals and for exter-

nal connections. See Tables 2 and 3 for a description.

For additional information and a list of application

notes, visit www.maxim-ic.com.

MAX7033 Evaluation Kit

4

_______________________________________________________________________________________

Table 3. I/O Connectors

SIGNAL

DESCRIPTION

RF_IN

RF input

F_IN

External reference frequency input

MIX_OUT

IF input/output

GND

Ground

VDD

Supply input

DATA_OUT

Sliced data output

SHDN

External power-down control

AGC_C

AGC control

Table 2. Test Points

TP

DESCRIPTION

2

Data slicer negative input

3

Data filter output

4

Peak detector out

5

+3.3V

6

GND

7

Data filter feedback node

8

Data out

9

Power-down select input

10

VDD

11

AGC control

12

Crystal select