MAX2741EVKIT Ver la hoja de datos (PDF) - Maxim Integrated

Número de pieza

componentes Descripción

Lista de partido

MAX2741EVKIT

MAX2741 Evaluation Kit

Maxim Integrated 

MAX2741 Evaluation Kit

Quick Start

The MAX2741 EV kit is fully assembled and factory test-

ed. Follow the instructions in the Connections and

Setup section for proper device evaluation.

Test Equipment Required

This section lists the recommended test equipment to

verify operation of the MAX2741. It is intended as a

guide only, and some substitutions are possible.

• An RF signal generator capable of delivering RF

power as low as -120dBm and as high as 0dBm at

the 1575.42MHz operating frequency such as HP

E4433B, or equivalent

• An RF spectrum analyzer that covers the MAX2741

operating frequency range, as well as a few har-

monics such as FSEB20, or equivalent

• One DC supply capable of up to 100mA at 2.6V

to 3.3V

• Power meter capable of measuring up to 0dBm

• One ammeter to measure the supply current

(optional)

• A PC with Windows® 98/XP

Connections and Setup

This section provides a step-by-step guide to operating

the EV kit and testing the device’s functions. This exam-

ple assumes that you intend to test the tuner as one

receiver. (See the Measurement Configuration in the

Detailed Description section.) Ensure that the shunts

are across jumpers J3–J9. Connect pin 1 to pin 2 of

JP1. Do not turn on the DC power or RF signal gen-

erators until all connections are made:

1) Connect a DC supply set to +2.75V to the VDC and

GND terminals on the EV kit. Do not turn on the supply.

2) Connect the RF signal generator to the RFIN SMA

connector; do not turn on the generator’s output.

Set the output of the RF signal generator to

1575.42MHz and power level to -90dBm.

3) Connect the EV kit to a PC through a parallel cable.

4) Download the MAX2741 software from the Maxim

website at www.maxim-ic.com. Install and run the

software on an IBM-compatible PC.

5) Connect the spectrum analyzer to the 2nd IFOUT

SMA connector. Set the center frequency to

3.78MHz and the span to 1MHz.

6) Turn on the DC power supply. The supply current

should read approximately 31mA.

7) Enable the RF generator’s output. Use the software

to set the registers and send to the part. Click on

the Test Mode button, then choose Lowpass Filter

and ADC, click Next, and choose Observe IF Signal

at Output of LPF; then click Finish.

8) The spectrum analyzer should display a tone at

3.78MHz at approximately -8dBm.

Layout Issues

A good PC board layout is an essential part of RF cir-

cuit design. The EV kit PC board can serve as a guide

for laying out a board using the MAX2741. Keep traces

carrying RF signals as short as possible to minimize

radiation and insertion loss. Use impedance control on

all RF signal traces. Bypass the VCC node of the PC

board with capacitors to the closest ground.

Windows is a registered trademark of Microsoft Corp.

_______________________________________________________________________________________ 3

Share Link: