Stand-Alone MAX194

_________________EV Kit Quick Start

This section applies only to the use of the MAX194 EV

kit by itself, without the µC module.

1) Make sure the jumpers are configured in accor-

dance with Table 3.

2) Connect the oscilloscope’s channel A probe to the

EOC test point on header J2, and the channel B

probe to the DOUT test point. Ground the scope

probes to the DGND test point or to the GND power

pad. Trigger on the positive edge of channel A.

Set the time base to 2µs per division, and set the

vertical gain to 2V per division.

3) Apply +12V DC to the terminals labeled +12V and

GROUND. The board draws less than 30mA of

supply current.

4) Momentarily close JU6 to reset the MAX194 EV kit.

Leave JU6 open for normal operation.

5) Apply a 0V to 4V signal source between the termi-

nals labeled INPUT+ and INPUT-. The conversion

codes may be observed on the oscilloscope’s

channel A. See the appropriate data sheet for

timing information.

MAX194 Evaluation System/Evaluation Kit

_______________________________________________________________________________________

3

Stand-Alone EV Kit

____________________Component List

DESIGNATION

QTY

DESCRIPTION

C1, C2, C4, C5, C19,

C20, C23–C26, C29

11

0.1µF ceramic capacitors

C3

1

1µF ceramic capacitor

C6, C7

2

15µF, 20V low-ESR capacitors

Sanyo OS-CON 20SA14

C8–C11, C13–C16, C21

9

10µF, 25V tantalum capaci-

tors

C12, C18, C27

3

100µF, 25V electrolytic

capacitors

C17, C171

2

0.01µF ceramic capacitors

C22

1

47µF low-ESR capacitor

Sanyo OS-CON 6SA47M

D1, D2

2

1N5819 Schottky diodes

J1

1

2x20 female data connector

J2

1

10-pin header

JU1, JU6

2

2-pin headers

JU3, JU7

2

3-way headers

JU4, JU5

2

3-pin headers

R1, R2

2

10

Ω, 5% resistors

R3, R8

2

680

Ω, 5% resistors

R4, R41

2

22

Ω, 5% resistors

R5, R51

2

47k

Ω, 5% resistors

R6, R10, R11, R13, R61

5

1k

Ω, 5% resistors

R7

1

10k

Ω, 5% resistor

R9

1

10M

Ω, 5% resistor

U1

1

Maxim MAX194

U2

1

Maxim MAX874

U3

1

79L05 negative linear

regulator

U4

1

Optional crystal oscillator

U5, U8

2

Maxim MAX400

U6

1

78L05 positive linear

regulator

U7

1

ICL7662 inverter

Table 3. Jumper Configuration for Stand-

Alone MAX194 EV Kit

JUMPER

STATE

FUNCTION

JU1

Closed

Ground the SCLK pin

JU3

OSC

Conversion clock comes from crystal

oscillator module

JU4

GND

Tie CS to GND, enabling data output on

DOUT

JU5

CONT

Tie CONV to EOC, continuous-conver-

sion mode

JU6

Open

Open = Normal Operation

Closed = Reset

JU7

UNI

Select unipolar mode