MAX1068 [MAXIM]

MAX1168 Evaluation Kit/Evaluation System; MAX1168评估板/评估系统


型号：	MAX1068
厂家：	MAXIM INTEGRATED PRODUCTS
描述：	MAX1168 Evaluation Kit/Evaluation System MAX1168评估板/评估系统
文件：	总11页 (文件大小：226K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

19-2994; Rev 0; 9/03

MAX1168 Evaluation Kit/Evaluation System

General Description

Features

The MAX1168 evaluation system (EV system) is a com-

plete 8-channel, 16-bit data-acquisition system that is

comprised of a MAX1168 evaluation kit (EV kit) and a

Maxim 68HC16MODULE-DIP microcontroller (µC)

module.

ꢀ Proven PC Board Layout

ꢀ Windows^®95/98/2000/XP-Compatible Evaluation

Software

ꢀ Convenient On-Board Test Points

ꢀ Fully Assembled and Tested

Order the complete EV system (MAX1168EVC16) for a

comprehensive evaluation of the MAX1168 using a per-

sonal computer (PC). Order the EV kit (MAX1168EVKIT)

separately if the 68HC16MODULE-DIP module has

been purchased with a previous Maxim EV system, or

for custom use in other µC-based systems.

MAX1168EVC16 System

Component List

PART

MAX1168EVKIT

68HC16MODULE-DIP

QTY

DESCRIPTION

MAX1168 EV Kit

68HC16 µC Module

Ordering Information

PART

IC PACKAGE

24 QSOP

INTERFACE TYPE

User-supplied

MAX1168EVKIT

MAX1168EVC16

Component Suppliers

24 QSOP

Windows software

SUPPLIER

PHONE

WEBSITE

Note: The MAX1168 software is included with the MAX1168 EV

kit but is designed for use with the complete EV system. The EV

system includes a µC module and the EV kit. If the Windows

software is not required, the EV kit board can be purchased by

itself, without the µC module.

Fairchild

Semiconductor

888-522-5372 www.fairchildsemi.com

847-803-6100 www.component.tdk.com

TDK

Note: To evaluate the MAX1068, request a free sample of the

MAX1068_CEG when ordering the MAX1168 EV kit.

Note: Please indicate you are using the MAX1168 when con-

tacting these component suppliers.

MAX1168EVKIT Component List

DESIGNATION QTY

DESCRIPTION

4.7kΩ 5% resistors (0603)

10Ω 5% resistors (0603)

DESIGNATION QTY

DESCRIPTION

R9–R16

0.1µF 10%, 16V X7R ceramic

capacitors (0603)

TDK C1608X7R1C104KT

C1–C18, C21,

R17–R24

C22

16-bit ADC (24-pin QSOP)

Maxim MAX1168CCEG

10µF 20%, 16V X5R ceramic

capacitors (1210)

TDK C3225X5R1C106M

C19, C20

Logic buffer (5-SOT23)

Fairchild Semiconductor NC7SZ125

Op amps (SOT23-5)

Maxim MAX4430EUK

1µF 20%, 10V X5R ceramic

capacitor (0805)

TDK C2012X5R1A105M

U3–U10

C23

2 x 20 right-angle female connector

Samtec SSW-120-02-S-D-RA

100pF ceramic capacitors (0603)

TDK C1608C0G1H101J

C24–C31

C32–C39

TB0

JU1

2-circuit terminal block

2-pin header

0.22µF 10%, 10V X7R ceramic

capacitors (0603)

TDK C1608X7R1A224K

JU2

3-pin header

None

Shunts

PC board, MAX1168 EV kit

MAX1168 EV kit software, CD-ROM

Surface-mount ferrite beads (0603)

TDK MMZ1608B601C

FB1, FB2

R1–R8

100Ω 5% resistors (0603)

Windows is a registered trademark of Microsoft Corp.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

MAX1168 Evaluation Kit/Evaluation System

6) Connect the +5V power supply to the VDD pad

MAX1168EV Kit Files

(with respect to the GND pad) on the MAX1168 EV

kit board.

FILE NAME

INSTALL.EXE

MAX1168.EXE

FUNCTION

Installs the EV kit files on your computer

Application program

7) Connect the -5V power supply to the VEE pad (with

respect to the GND pad) on the MAX1168 EV kit

board.

HELPFILE.HTM MAX1168 EV kit help file

8) Connect the 9-pin serial cable from the computer’s

serial port to the µC module’s DB9 connector (J3).

UNINST.INI

Uninstalls the EV kit software

KIT1168.C16

Software loaded into the 68HC16 µC

9) Install the MAX1168 EV kit software on your com-

puter by running the INSTALL.EXE program on the

CD-ROM. The program files are copied and icons

are created in the Programs section within the

Windows Start menu.

Quick Start

Recommended Equipment

• MAX1168EVC16 (MAX1168EVKIT board and

68HC16MODULE-DIP)

• Three DC power supplies:

+8V to +20V at 0.25A

+5V at 0.2A

10) Turn on the +5V power supply. Next, turn on the -5V

power supply. Finally, turn on the +8V to +20V

power supply and turn on the µC module’s slide

switch SW1 to the ON position.

-5V at 0.2A

• Analog signal source:

0 to 4.096V

11) Start the MAX1168 EV kit program by clicking on its

icon in the Programs section within the Windows

Start menu.

• Windows 95/98/2000/XP-compatible computer with

12) The Windows program will prompt you to click OK

for Automatic serial port selection. When you click

OK, the Windows program automatically downloads

the file KIT1168.C16 to the module. Please wait

approximately 25 seconds for the download to

complete.

an available serial (COM) port

• 9-pin I/O extension cable (straight-through female-

to-male)

Procedure

Do not turn on the power until all connections are

complete:

13) Apply an input signal (0 to +4.096V) between AIN0

and GND. Observe the AIN0 label on the running

Windows program.

1) Verify jumper JU1 is ON, disabling DSP mode.

2) Verify jumper JU2 is connected to pins 2–3,

Detailed Description of Software

enabling an 8-bit-wide data-transfer mode.

The evaluation software’s main window shown in Figure

1 displays the voltage and code of the analog-input

signals AIN0–AIN7. The software supports manual read

or automatic read operations. Separate comboboxes

allow quick modifications to the MAX1168’s control

byte. The SPI™ serial clock frequency is adjustable

from 4.19MHz to 33kHz, and the software’s reference

value can be changed to match the applied external

reference. The provided Windows-compatible software

supports SPI mode (not DSP mode) and also only sup-

ports the MAX1168 EV kit when configured in 8-bit-

wide data-transfer mode. Table 1 describes all the con-

trols on the evaluation software’s main window.

3) Carefully connect the boards by aligning the 40-pin

connector of the MAX1168 EV kit with the 40-pin

header of the 68HC16MODULE-DIP module. Gently

press them together. The two boards should be

flush against one another.

4) Ensure that the µC module’s SW1 switch is in the

OFF position.

5) Connect the +8V to +20V power supply to the µC

module’s terminal block (J2), located next to the

ON/OFF switch (SW1) along the top edge of the µC

module. Observe the polarity marked on the board.

SPI is a trademark of Motorola, Inc

_______________________________________________________________________________________

MAX1168 Evaluation Kit/Evaluation System

Table 1. Software Control Descriptions

CONTROL

DESCRIPTION

The View menu makes the COM port debug form visible

The BlockSample menu is an EV kit software feature that allows a single channel to be sampled and

stored. The data block length is selectable and the data can be saved to a file. Block sampling is limited

to single-channel read modes only. SCAN[1:0] = 01 or 11 modes are not supported. For multiple-channel

reads, use the Read ADC button or the AutoRead checkbox.

The Device menu allows the user to evaluate either the MAX1168 or MAX1068

The Help menu allows the user to view the help file or the software’s about box

The Control Byte label shows the current control byte setting in hexadecimal

The CS[2:0] combobox selects the channel below:

000 CS2 CS1 CS0 = Channel 0

001 CS2 CS1 CS0 = Channel 1

010 CS2 CS1 CS0 = Channel 2

011 CS2 CS1 CS0 = Channel 3

100 CS2 CS1 CS0 = Channel 4

101 CS2 CS1 CS0 = Channel 5

110 CS2 CS1 CS0 = Channel 6

111 CS2 CS1 CS0 = Channel 7

The SCAN[1:0] combobox selects the scan mode below:

00 SCAN1 SCAN0 = Single channel, no scan

01 SCAN1 SCAN0 = Sequentially scans channel 0 to CS[2:0]

10 SCAN1 SCAN0 = Sequentially scans channel 4 to CS[2:0]; CS[2:0] ≥ 4

11 SCAN1 SCAN0 = Scan channel CS[2:0] eight times

The SEL[1:0] combobox selects the reference mode below:

00 SEL1 SEL0 = Internal reference mode

01 SEL1 SEL0 = EV kit software does not support this mode

10 SEL1 SEL0 = EV kit software does not support this mode

11 SEL1 SEL0 = External reference mode

The CLK combobox selects the clock mode below:

0 EXT CLK

1 INT CLK

The SPI SCLK Frequency combobox selections are:

02: 4.19MHz

04: 2.10MHz

FF: 33kHz

_______________________________________________________________________________________

MAX1168 Evaluation Kit/Evaluation System

Table 1. Software Control Descriptions (continued)

CONTROL

DESCRIPTION

The Set Vref button allows the user to specify the actual reference voltage. The evaluation software

assumes a +4.096V reference voltage, unless otherwise specified. To override the default +4.096V software

reference value, measure the actual reference voltage at the terminal block (TB0) on the MAX1168 EV kit

board and enter the new reference voltage, without the volt unit. Finally, press the Set Vref button. The EV kit

software uses the value typed in the Vref field to translate the digital code to a voltage.

Pressing the Read ADC button performs the conversion(s) specified by the control byte and reads back

the result(s).

Checking the AutoRead checkbox performs the conversion(s) specified by the control byte and reads

back the result(s) every 500ms. A blinking asterisk indicates AutoRead is active.

The Exit button closes the program

Detailed Description of Hardware

Table 2. DSP Frame Sync Receive Input

(DSPR)

MAX1168 EV System

The MAX1168 EV system is a complete 8-channel, 16-

bit data-acquisition system consisting of a MAX1168 EV

kit and a Maxim 68HC16MODULE-DIP µC module. The

MAX1168 EV system is used to evaluate the MAX1168

8-channel, 16-bit serial ADC. See the Quick Start sec-

tion for setup and operating instructions. See Table 1 for

more information on the provided Windows software.

SHUNT

POSITION

JUMPER

DESCRIPTION

DSP mode disable

ON*

DSP mode enable (the supplied

Windows software does not

support this mode)

JU1

OFF

*Default configuration.

MAX1168 EV Kit

The MAX1168 EV kit board provides a proven layout for

evaluating the MAX1168 8-channel, 16-bit ADC and can

be obtained separately without the µC module for use

with an existing µC. The MAX1168 EV kit contains two

different types of buffers. U2 is a logic buffer to limit the

load capacitance that is seen by the DOUT line of the

MAX1168. U3–U10 are 16-bit accurate analog buffers

connected in the unity-gain configuration. U1 is powered

Table 3. Data Bit Transfer Select Input

(DSEL)

SHUNT

POSITION

JUMPER

DESCRIPTION

16-bit-wide data-transfer mode

(the supplied Windows software

does not support this mode)

1–2

JU2

from V

and U3–U10 are powered from V

and V

U3 is powered from the µC module (J1-7, J1-8). A termi-

nal block (TB0) has also been provided on the MAX1168

EV kit board for evaluating external reference mode.

Refer to the MAX1167/MAX1168 or MAX1067/ MAX1068

data sheets to ensure all interface timing specifications

are met.

2–3*

8-bit-wide data-transfer mode

*Default configuration.

Caution: Do not connect an external controller to

the DSEL pad while a shunt is on jumper JU2.

The MAX1168 and MAX1168 EV kit board support DSP

and 16-bit-wide data-transfer mode. Jumpers JU1 and

JU2 can be configured for these modes; however, the

supplied EV kit Windows-compatible software does not

support these two modes. Please refer to the

MAX1167/MAX1168 or MAX1067/MAX1068 data sheets

for more information.

_______________________________________________________________________________________

MAX1168 Evaluation Kit/Evaluation System

Figure 1. MAX1168 Evaluation Software’s Main Window

_______________________________________________________________________________________

MAX1168 Evaluation Kit/Evaluation System

2 x 2 0 R I G H T A N G L E F E M A L E C O N N E C T O R

Figure 2. MAX1168 EV Kit Schematic

_______________________________________________________________________________________

MAX1168 Evaluation Kit/Evaluation System

Figure 3. MAX1168 EV Kit Component Placement Guide—Component Side

_______________________________________________________________________________________

MAX1168 Evaluation Kit/Evaluation System

Figure 4. MAX1168 EV Kit PC Board Layout—Component Side

_______________________________________________________________________________________

MAX1168 Evaluation Kit/Evaluation System

Figure 5. MAX1168 EV Kit PC Board Layout—Inner Layer 2 (GND)

_______________________________________________________________________________________

MAX1168 Evaluation Kit/Evaluation System

Figure 6. MAX1168 EV Kit PC Board Layout—Inner Layer 3 (VDD)

10 ______________________________________________________________________________________

MAX1168 Evaluation Kit/Evaluation System

Figure 7. MAX1168 EV Kit PC Board Layout—Solder Side

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11

Printed USA

is a registered trademark of Maxim Integrated Products.

MAX1068 [MAXIM]

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