EVB90121

MLX90121 Evaluation Board

390129012101

Page 6 of 8

Evaluation Board

Rev 001

Dec-2004

4 Guidelines

This chapter describes all connections and jumpers available on the EVB90121 circuit to be able to use it in

the most efficient way.

4.1 Power supply

• The circuit can be supplied with a standard DC supply block (transformer or switch mode power supplies)

connected to the jack connector J1. The input supply can be selected from 6 to maximum 9 volts DC to

avoid permanent damage of the evaluation board.

• The internal power supply of the board can be selected between 3 Volts and 5 Volts DC by changing the

position of the jumper J3.

4.2 Antenna connection

• The SMA screw connector JP1 allows the connection of a 50-ohm antenna. The matching network is

adjusted with CV1 capacitor on a prefect 50-ohm load. This will give maximum power up to 200mWatt to

the connected antenna.

4.3 Connection to a microcontroller

• All digital Inputs/Outputs of the MLX90121 device are available on the JP2 connector. This allows easy

connection to a microcontroller. Following table is the description of JP2 connector.

Pin number (connector JP2)

Name

Description

1

GND

Ground

2

CK

Serial Clock Input

3

MODE

Configuration or Communication selected Input

4

DIN

Data Input

5

DOUT

Data Output

6

RTB

Reception or Transmission selection Input

7

DSYNC

Synchronization Output for Dout

8

-

Not connected

9

-

Not connected

10

-

Not connected

Table 2: Connector JP2