bottom half of each bar graph shows a rolling aver-

age of the readings for that channel. The AUTO

NULL switch is highlighted. With AUTO NULL and

GAIN CAL both off, the bar graphs read the real

voltage present at the input terminals of the

MAX110.

10) Apply an input signal between the IN1+ and IN1-

terminals of the MAX110 EV kit. Note that if

jumper JU7 is installed, then IN1- is connected to

ground. Observe the readout on the display screen.

11) To examine the bit patterns of the MAX110’s data

input and output, press “B” to switch to the Bit

Manipulation Panel screen. The data input to the

MAX110 is displayed in the upper left corner, and

the output data is displayed in the lower left corner.

A rolling average display of the data received is

displayed underneath the most recently received

data. Data is displayed in hexadecimal and in bina-

ry. To switch back to the Control Panel, press “C”.

12) Before turning off power to the MAX110 EV kit, exit

the program by pressing ALT+X.

Stand-Alone MAX110 EV Kit

_________________________Quick Start

This section applies only to the use of the MAX110 EV

kit by itself, without the 80C32 µC module.

1) Verify that shunts are installed at the proper loca-

tions. Table 1 shows the standard configuration. As

shipped from the factory, U1 is a MAX110, and the

voltage reference is 2.000V.

2) Connect a regulated +5V DC power supply to the

terminals labeled +5V and GND. The GND pad is

ground, and the +5V pad is the +5V input.

3) Use a voltmeter to verify that at least -4.75V

appears at the -5V pad, and verify that the voltage

reference between VREF+ and VREF- is 2.000V.

4) Connect the interface signals to the DIN, DOUT,

CS, BUSY, and SCK test points. Use the GND test

point as signal ground. See the MAX110 data sheet

for timing information.

5) Apply the input voltage to the input terminals. One

channel is between IN1+ and IN1-, and the other

channel is between IN2+ and IN2-. If shunt J7 is

installed, then IN1- is connected to GND. If shunt J8

is installed, then IN2- is connected to GND. Be sure

to observe the absolute maximum ratings.

____________Evaluating the MAX111

The MAX110 EV kit supports both the MAX110 and the

MAX111 ICs. To evaluate the MAX111 use the following

procedure:

1) While the EV kit is turned off, move J4 to the 2-3

2) Replace U1 with a MAX111.

3) Note that the MAX111 uses a 1.25V reference.

Replace resistor R11 with a 2.43k

Ω resistor or

remove jumper J3 and apply an external 1.25V ref-

erence at VREF.

4) Follow the quick-start instructions for the MAX110.

The MAX111 output codes are identical to the MAX110

output codes. The input voltage range is more restricted

on the MAX111 because it is a single-supply device. Refer

to the MAX110/MAX111 data sheet for more information

on the MAX111’s input voltage range and accuracy.

the J4 shunt between pins 2 and 3. For the MAX110, tie

pins 1 and 2.

Detailed Description

________________________of Hardware

Jumper Options

Several jumper blocks allow different configurations of

the MAX110. Jumper functions and default settings are

shown in Tables 1 and 2.

Using an External Clock

To drive the MAX110 with an external clock, use the

following procedure:

1) Put a shunt across J5 pins 2-3, leaving pin 1 open.

2) Put a shunt across J1 pins 1-2, leaving pin 3 open.

3) Connect the external oscillator to the EXTCLK pad.

4) Connect the oscillator ground to the GND pin of

header H1.

MAX110 Evaluation System/Evaluation Kit

_______________________________________________________________________________________

3

JUMPER

DEFAULT SETTING

J1

1-2

J2

shorted by trace

J3

shorted by trace

J4

1-2

J5

1-2

J7

closed

J8

closed

J9

shorted by trace

Table 1. Default Jumper Settings