MAX1282 Evaluation System MAX1282 evaluation system system) compl

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MAX1282 Evaluation System
MAX1282 evaluation system system) complete four-channel data-acquisition system consisting MAX1282 evaluation kit) Maxim 68HC16MODULE-DIP microcontroller (µC) module. MAX1282 high-speed, 12-bit data-acquisition system. Windows® 95/98 software provides handy user interface exercise MAX1282's features. Order complete system (MAX1282EVC16) comprehensive evaluation MAX1282 using Order (MAX1282EVKIT) 68HC16MODULE-DIP module already been purchased with previous Maxim system, custom other µC-based systems. Proven Board Layout Convenient On-Board Test Points Data-Logging Software Fully Assembled Tested
Features
Evaluates: MAX1282
Ordering Information
PART MAX1282EVKIT MAX1282EVC16 TEMP. RANGE +70°C +70°C INTERFACE User supplied Windows software
MAX1282EVC16 System
PART MAX1282EVKIT 68HC16MODULE-DIP DESCRIPTION MAX1282 68HC16 module
Note: MAX1282 software designed with complete system, MAX1282EVC16 (includes 68HC16MODULE-DIP module MAX1282EVKIT). MAX1282 evaluation software will used, MAX1282EVKIT board purchased itself, without
MAX1282EVKIT Files
FILE DESCRIPTION Installs files your computer Application program Software loaded into 68HC16 INSTALL.EXE MAX1282.EXE KIT1282.C16
MAX1282EVKIT Component List
DESIGNATION C1-C4, C11, C12, R1-R4 None None None None DESCRIPTION 0.01µF ceramic capacitors 4.7µF tantalum capacitor 0.1µF ceramic capacitors 10µF, tantalum capacitors 2x20 right-angle socket 2-pin header 3-pin header resistors resistors 8-pin header Maxim MAX1282BCUE (16-pin TSSOP) board, MAX1282 3-1/2in software disk, MAX1282 MAX1282 data sheet MAX1282 data sheet
Recommended Equipment
Maxim MAX1282EVC16 (contains MAX1282EVKIT board 68HC16MODULE-DIP) small power supply, such 12VDC 0.25A plug-in transformer battery PC-compatible computer running Windows 95/98 spare serial communications port, preferably 9pin plug serial cable connect computer's serial port 68HC16MODULE-DIP
Quick Start
Carefully connect boards aligning 40-pin header MAX1282 with 40-pin connector 68HC16MODULE-DIP module. Gently press them together. boards should flush against another.
Windows 95/98 registered trademark Microsoft Corp.
Maxim Integrated Products
free samples latest literature, visit www.maxim-ic.com phone 1-800-998-8800. small orders, phone 1-800-835-8769.
MAX1282 Evaluation System Evaluates: MAX1282
Ensure that closed position (Table Connect 7VDC 20VDC power source module terminal block located next on/off switch, along edge module. Observe polarity marked board. Connect cable from computer's serial port module. using 9-pin serial port, straight-through, 9-pin female-to-male cable. only available serial port uses 25-pin connector, standard 25-pin 9-pin adapter will required. software checks modem status lines (CTS, DSR, DCD) confirm that correct port been selected. Install MAX1282 software your computer running INSTALL.EXE program floppy disk. program files copied icons created them Windows Start menu. Start MAX1282 program opening icon Start menu. program will prompt connect module turn power Slide position. Select correct serial port, press program will automatically download KIT1282.C16 module. Apply input signal between COM. Observe readout screen. real time. update rate limited about samples second, port bandwidth limitations.
Controls
control word divided into several fields. change active control word, drop down appropriate field's combo select desired option. QSPIclock STOP, then configuration data will sent until READ button pressed.
Statistics
Minimum Maximum fields show highest lowest readings acquired. Average field shows running mean. Clear button resets statistics. remove offset errors, first apply active input channel, clear statistics, acquire some samples, then check Tare. This average offset voltage will subtracted from subsequent measurements.
Sampling
Choose desired sampling rate (QSPI clock), sampling size (Sample! menu item), press Begin Sampling! Sample! pop-up window). Sample size restricted power permit processing once data saved file. After samples have been collected, data automatically uploaded host graphed. Once displayed, data optionally saved file.
Detailed Description
MAX1282 Stand-Alone
MAX1282EVKIT provides proven board layout evaluate MAX1282. must interfaced appropriate timing signals proper operation. Connect VDD, connect ground return (Figure Refer MAX1282 data sheet timing requirements.
Saving Graphs Disk
Data real-time graph sampled data graphs saved file. Only output codes saved, voltages inferred, based reference voltage maximum code value.
Scanning Channels Input Signal
scan through channels, select SCAN from Input menu.
MAX1282 System
MAX1282EVC16 system operates from usersupplied 7VDC 20VDC power supply. Windows 95/98 software running interfaces system board through computer's serial communications port. Quick Start section set-up operating instructions.
Table Jumper Functions
JUMPER POSITION Closed* Open 1-2* FUNCTION tied must connected analog common Operate Shutdown
Description Software
evaluation software's main window controls serial clock speed sample rate. displays voltage output code, well some input signal statistics. separate graph window shows data chang-
*Default configuration QSPI trademark Motorola, Inc.
MAX1282 Evaluation System
Evaluating Shutdown
evaluation software configures 68HC16's QSPI submodule continuously read data from MAX1282 into 68HC16. sample rate controlled QSPI clock. evaluate power-saving modes, these automatic updates must stopped. First, QSPI clock control STOP. This reconfigures 68HC16's QSPI submodule stop driving serial clock. Second, evaluation software's main window, uncheck Read Every.msec check-box. Next, choose desired software power-down control word, press Read button send configuration MAX1282. evaluating hardware shutdown, move jumper position.
Troubleshooting
Problem: output measurement. System seems report zero voltage fails make measurement. Check supply voltage. Check reference voltage using digital voltmeter (DVM). oscilloscope verify that conversion-start signal being strobed. Verify that SHDN being driven high. Problem: Measurements erratic, unstable; poor accuracy. Check reference voltage using DVM. oscilloscope check noise. When probing noise, keep oscilloscope ground return lead short possible, preferably less than 1/2in (10mm).
Evaluates: MAX1282
Reference Voltage
evaluation software assumes 2.5V reference voltage, unless otherwise specified. Refer MAX1282 data sheet more information. override this value, type reference voltage into VREF edit press VREF button. Note: This VREF value used only evaluation software does physically change reference voltage.
Detailed Hardware Description
MAX1282, high-speed, multichannel, 12-bit data-acquisition system. Resistors R1-R4 capacitors C1-C4 form single-pole, lowpass anti-aliasing filters with nominal time constant corner frequency approximately 50kHz. bypass ADC's voltage reference reference buffer. When plugged into 68HC16MODULE, circuit powered +5V. (See Figure refer MAX1282 data sheet.)
Evaluates: MAX1282
MAX1282 Evaluation System
Figure MAX1282 Schematic
VDD1 VDD1 0.1µF TP1-7 J1-8 TP1-1 J1-37 0.01µF TP1-5 J1-31 J1-38 TP1-4 J1-36 SSTRB DOUT
J1-7 VDD2 10µF VDD2 0.1µF TP1-6
VDD1 SCLK
10µF
0.01µF
MAX1282
J1-1 J1-2 J1-3 J1-4
0.01µF
0.01µF
TP1-3 J1-29
TP1-2 J1-35
SHDN
SHDN VDD1 4.7µF
REFADJ 0.01µF REFADJ
MAX1282 Evaluation System Evaluates: MAX1282
Figure MAX1282 Board Layout-Component Side
Figure MAX1282 Component Placement Guide- Component Side
Figure MAX1282 Board Layout-Solder Side
MAX1282 Evaluation System Evaluates: MAX1282
NOTES
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
_Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600 2000 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

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