MAX12930 datasheet(4/20 Pages) MAXIM

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Evaluates: MAX12930, MAX12931

MAX12930/MAX12931 Evaluation Kit

Detailed Description of Hardware

The MAX1293XS or MAX1293XW EV kit is powered from

two external adjustable power supplies as described below.

External Power Supplies

Power to the MAX1293XS or MAX1293XW EV kit is derived

from two external sources which can both be between

+1.71V and +5.5V. Connect one source between the

VDDA and GNDA test points, and another source between

the VDDB and GNDB test points. Each supply can be set

independently and can be present over the entire range

from 1.71V to 5.5V, regardless of the level or presence of

the other supply. The MAX12930/MAX12931 level-shifts

the data, transmitting them across the isolation barrier.

Two SMA connectors on each side of the board allow

easy connections to signal generator(s) and oscilloscope.

A typical application diagram is shown in Figure 3.

Decoupling Capacitors

Each power supply is decoupled with a 10µF ceramic

capacitor placed close to the power supply test point, and

a 0.1µF ceramic capacitor placed close to U1.

Termination

Each input and output has an unpopulated 0805 SMT

resistor (R1-R4) and a 0805 SMT capacitor (C1, C2, C6,

C7) to GND_ to allow termination based on customer

requirements.

Figure 3. Typical Application Diagram

MAX12931

VDDA

OUT1

IN2

GNDA

VDDB

IN1

OUT2

GNDB

0.1µF

2.5V

MICRO

CONTROLLER

0.1µF

3.3V

VDD

RXD

TRANSCEIVER

TXD

GND

VDD

GND

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