Datasheet

LVDS

ADC

JP15 JP14

BIN

JP1

Enable

/BIN

J11

SW1

J10

USB

/AIN

AIN

Trigger

J9J2

Sync

SW2

Trigger

CLKIN

JP13

JP12

JP5

GND

Introduction

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1.3 EVM Jumpers and Switches

There are a number of jumpers on the EVM for selecting operational modes of the ADC, power supply

options, and SPI port options. Many of the jumper selections that involve DC inputs or static control

signals are by way of push-on square post jumpers. Figure 3 illustrates the position of the jumpers relative

to the more recognizable features of the EVM such as the banana jacks or SMA inputs. Jumper selections

that involve high-speed switching signals are implemented by way of surface mount 0-Ω jumper resistors,

and these are represented in Figure 4. In both figures, default positions of the jumpers as the EVM is

normally shipped are indicated. Note that some of the jumpers are, by default, left open circuit. The

surface-mount jumper resistors require soldering to change from default to any other desired

configuration.

The functions of the connectors, LEDs and pushbutton switches are described by their labels in Figure 2.

The presence of the 5-V supply voltages to the EVM is indicated by LED D1 lighting.

Figure 3. EVM Jumpers and Switches

There are two pushbutton switches on the EVM. Pushbutton switch SW1 is used to assert a reset signal

to the ADS540x. The ADS540x requires a reset before it is configured for use, but it is not necessary to

use SW1. The ADS540x SPI GUI may be used to toggle the reset register bit in the ADS540x register

map.

The trigger signal to the ADS54T0x may be sourced by the SMA connector J9, the Samtec connector J11,

or the pushbutton SW2 depending on the position of the surface mount jumper SJP1.

ADS540x and ADS54T0x Evaluation Module (EVM) SLAU450–July 2012

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