MAX3160E Evaluation Kit

2

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Quick Start

Recommended Equipment

•

3.3V, 0.5A DC power supply

•

Logic function generator

•

Oscilloscope

Procedure

The MAX3160E EV kit is fully assembled and tested.

Follow the steps below to verify board operation.

Caution: Do not turn on the power supply until all

connections are completed.

1) Verify that shunts are installed across pins 1-2 of

jumpers JU5, JU6, JU7, and JU8 (data communica-

tions equipment (DCE) mode).

2) Verify that a shunt is installed on jumpers JU3

(RS-232 mode) and JU4 (full-duplex mode).

3) Verify that shunts are not installed on jumpers JU1

(MAX3160E enabled), JU2 (fast mode), and JU9

and JU10 (RS-485/RS-422 differential I/O not termi-

nated).

4) Set the DC power supply output to 3.3V and disable

the output.

Terminate the function generator as needed.

6) Connect the DC power-supply positive output to the

VCC pad on the EV kit.

7) Connect the supply ground to the GND pad next to

VCC on the EV kit.

8) Connect the logic function generator output to the

DI/T1IN PCB pad and connect ground to the GND

PCB pad.

9) Enable the power-supply output and then the func-

tion generator output.

10) Use the oscilloscope to measure the transmitter out-

put Z(B)/T1OUT at pin 3 of jumper JU5. Verify that

the waveform is a 500kHz square wave and is

Detailed Description

The MAX3160E EV kit demonstrates the MAX3160E

RS-232/RS-485/RS-422 multiprotocol transceiver IC.

The EV kit operates from a 3V to 5.5VDC source capa-

ble of supplying 100mA.

The EV kit features jumpers to configure the communi-

cation protocol to RS-232 operation or RS-485/RS-422

operation. In RS-232 mode operation, the MAX3160E

communicates at data rates up to 1Mbps. In RS-485/

RS-422 mode operation, the differential driver and

receiver operate in full-duplex or half-duplex mode and

communicate at data rates up to 10Mbps. The

MAX3160E receiver represents a 1/8 unit load on the

RS-485/RS-422 bus. Resistors R5 and R6 provide a

configurable termination for the RS-485/RS-422 bus.

PCB pads and DB9 connector J1 are available for inter-

facing with an RS-232/RS-485/RS-422 serial line. See

Table 5 and Figures 1, 2, and 3 for the respective sig-

nal pins or pads.

Jumper Selection

The MAX3160E EV kit utilizes several jumpers to reconfig-

ure circuit features and functionality: IC enable, slew-rate

selection, communication-protocol selection, full-duplex/

half-duplex communication, DTE/DCE connections, and

RS-485/RS-422 differential I/O termination.

Enable

The MAX3160E EV kit features jumper JU1 to enable the

MAX3160E or place the IC in shutdown mode, thus

reducing quiescent current. A SHDN PCB pad is also pro-

vided for the shutdown signal to interface with an external

controller. See Table 1 for configuring jumper JU1.

Slew-Rate Selection

Jumper JU2 on the EV kit configures the MAX3160E

communication slew-rate mode. Slew-rate limited-mode

operation minimizes EMI radiation, while fast-mode

operation optimizes maximum data rates for either pro-

tocol. See Table 2 for configuring jumper JU2 and refer

to the MAX3160E IC data sheet for more information on

slew-rate configuration.

Table 2. Slew Rate (Jumper JU2)

SHUNT

POSITION

FAST PIN

EV KIT FUNCTION

Installed

Connected to

GND

Slew-rate limited mode.

RS-232/RS-485/RS-422

250kbps maximum data

rate

Not installed

Connected to

VCC through

resistor R2

Fast mode. RS-232 1Mbps

maximum data rate;

RS-485/RS-422 10Mbps

maximum data rate

Table 1. MAX3160E Enable (Jumper JU1)

SHUNT

POSITION

SHDN PIN

EV KIT FUNCTION

Installed

Connected to

GND

MAX3160E shutdown

Not installed

Connected to VCC

through resistor R1

MAX3160E enabled