MAX1132 Evaluation MAX1132 evaluation system system) complete, si

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MAX1132 Evaluation MAX1132 evaluation system system) complete, si

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19-2161; 09/01
MAX1132 Evaluation
MAX1132 evaluation system system) complete, single-channel data-acquisition system, consisting MAX1132 evaluation kit) Maxim 68HC16MODULE-DIP microcontroller (µC) module. MAX1132 high-speed, single-channel, 16-bit data acquisition system. Windows® 95/98 software provides handy user interface exercise MAX1132's features. Order complete System (MAX1132EVC16) comprehensive evaluation MAX1132 using Order (MAX1132EVKIT) 68HC16MODULE-DIP module already been purchased with previous Maxim system, custom other µCbased systems. MAX1132 software designed with complete system MAX1132EVC16 (includes 68HC16MODULE-DIP module together with MAX1132 EVKIT). MAX1132 evaluation software used, MAX1132EVKIT board purchased itself, without Proven Board Layout Complete Evaluation System Convenient Test Points Provided On-Board Data-Logging Software Fully Assembled Tested
Features
Evaluates: MAX1132/MAX1133
Ordering Information
PART MAX1132EVKIT MAX1132EVC16 TEMP. RANGE +70°C +70°C INTERFACE TYPE User supplied Windows software
MAX1132EVKIT Parts List
REFERENCE FB1, JU1, JU2, JU3, TB1, None None None None DESCRIPTION 10µF B-size tantalum capacitors 2.2µF ceramic capacitor 0.22µF ceramic capacitor (1206) 0.1µF ceramic capacitors (1206) ceramic capacitor (1206) Ferrite beads right-angle socket, SamTec SSW-120-02-S-D-RA 3-pin headers 2-pin headers 100k 1206 resistor 0.200in screw terminal blocks 9-pin header MAX1132BCAP 74HC04 (14-pin inverter board, MAX1132 3.5in software disk, MAX1132 MAX1132 data sheet (includes 68HC16MODULE-DIP manual) MAX1132 data sheet FILE INSTALL.EXE MAX1132.EXE KIT1132.C16 PART MAX1132EVKIT 68HC16MODULE-DIP
MAX1132EVC16 System Component List
DESCRIPTION MAX1132 68HC16 module
List Files MAX1132
DESCRIPTION Installs files computer Application program Software loaded into 68HC16
Windows registered trademark Microsoft Corp.
Maxim Integrated Products
pricing, delivery, ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, visit Maxim's website www.maxim-ic.com.
MAX1132 Evaluation Evaluates: MAX1132/MAX1133
MAX1132 Stand-Alone
MAX1132EVKIT provides proven board layout facilitate evaluation MAX1132. must interfaced appropriate timing signals proper operation. Connect AVDD connect ground return AGND (Figure Refer MAX1132 data sheet timing requirements. Install MAX1132 software your computer running INSTALL.EXE program floppy disk. program files copied icons created them Windows Start menu. Start MAX1132 program opening icon Start menu. program prompts connect module turn power Slide position. Select correct serial port click program automatically downloads KIT1132.C16 module. Apply input signal across pins JU2. Observe readout screen.
MAX1132 System
MAX1132EVC16 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 setup operating instructions.
Quick Start
Recommended Equipment
Before begin, following equipment needed: MAX1132EVC16 (contains MAX1132EVKIT 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 9-pin plug Serial cable connect computer's serial port 68HC16MODULE-DIP
Detailed Description Software
evaluation software main window controls active control word bits, serial clock speed, sample rate. displays voltage output code, well some statistics input signal. separate graph window shows data changing 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. QSPI clock STOP, configuration data sent until READ button clicked.
Carefully connect boards aligning 40-pin header MAX1132 with 40-pin connector 68HC16MODULE-DIP module. Gently press them together. boards should flush against another. Check jumper settings (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 required. software checks modem status lines (CTS, DSR, DCD) confirm that correct port been selected.
Statistics
minimum maximum fields show lowest highest readings acquired. average fields show running mean root-mean-square input signal. Clear button resets statistics. remove offset errors, first apply zero volts active input channel, clear statistics, acquire some samples, then check Tare. This offset subtracted from subsequent voltage measurements.
Sampling
sample data rates 125ksps, select Sample menu item, make your selections, click Begin Sampling button. 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.
MAX1132 Evaluation
Saving Graphs Disk
Data real-time graph sampled data graphs saved file. Only output codes saved, voltages inferred based reference voltage maximum code value.
Detailed Description Hardware
MAX1132 (U1) high-speed, single-channel, 16bit data-acquisition system. There antialiasing filter provided. input signal applied directly JU2. High-impedance signal sources require input buffer, which installed prototype area. bypasses bandgap reference, bypasses converter`s voltage reference. When plugged into 68HC16MODULE, AVDD DVDD circuits both powered +5V. (Figure Refer MAX1132 data sheet.
Evaluates: MAX1132/MAX1133
Evaluating Shutdown
evaluation software configures 68HC16's QSPI submodule continuously read data from MAX1132 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 checkbox. Next, choose desired software power-down control word, click Read button send configuration MAX1132. evaluating hardware shutdown, move position.
Evaluating MAX1133
change evaluation software's full-scale voltage with MAX1133, type 4.096 into full-scale edit click VREF button.
Troubleshooting
Problem: output measurement. System seems report zero voltage, fails make measurement. Check VLOGIC supply voltages. Check +4.096V reference voltage using digital voltmeter. oscilloscope verify that conversion-start signal being strobed. Verify that SHDN being driven high.
Reference Voltage
evaluation software assumes +4.096V reference voltage +12V full-scale voltage, unless otherwise specified. Refer MAX1132 data sheet more information. override these values, type values into appropriate edit click VREF button.
Table Jumper Functions
JUMPER POSITION Open Closed Open Closed Open* Closed Open* Operate SHDN controlled 68HC16 module Shutdown Measure short circuit (zero volts) Apply input signal Illegal Enable internal reference, apply external reference Disable internal reference Enable internal reference User-programmable output User-programmable output User-programmable output FUNCTION
*Default configuration
MAX1132 Evaluation Evaluates: MAX1132/MAX1133
U2-C 74HC04 U2-D 10µF AVDD TP1-1 10µF J1-1 J1-2 J1-3 J1-4 TP1-2 DVDD TP1-3 SSTRB DOUT TP1-7 100k J1-31 U2-A 74HC04 U2-B 74HC04 TP1-8 J1-35 SCLK J1-29 TP1-2 DVDD 0.1µF MAX1132 DVDD SHDN DGND AVDD DGND AVDD 0.22µF 2.2µF AGND REFADJ CREF 1.0µF TP1-4 AGND TP1-5 DVDD 0.1µF TP1-6 J1-37 DVDD J1-36 0.1µF J1-38 DVDD 74HC04 U2-F 74HC04 U2-G 74HC04
DVDD J1-7 J1-8
AVDD
J1-27
NOTES: MINIMIZE PARASITIC CAPACITANCE 11-U2 KEEP TRACE SHORT KEEP GROUND PLANE 0.025in AWAY. SUPPLY GROUND RETURN SHOULD ROUTED CONNECTOR FLOODED.
Figure MAX1132 Schematic Diagram
Problem: Unacceptable errors when measuring transducer. Although most signal sources connected directly MAX1132's analog input, some high-impedance signal sources require input buffer. Check settling errors increasing acquisition time: operate evaluation external clock mode, clocks conversion, with QSPI clock slowest setting.
Problem: Measurements erratic, unstable; poor accuracy. Check reference voltage input using digital voltmeter. oscilloscope check noise. When probing noise, keep oscilloscope ground return lead short possible, preferably less than 1/2in (10mm).
MAX1132 Evaluation Evaluates: MAX1132/MAX1133
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Listing Reading Channels with QSPI
MAX1132 Evaluation Evaluates: MAX1132/MAX1133
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Listing Reading Single Channel with QSPI
MAX1132 Evaluation Evaluates: MAX1132/MAX1133 Evaluates: MAX1132
1.0"
1.0"
Figure MAX1132 Component Placement Guide Component Side
Figure MAX1132 Board Layout-Component Side
1.0"
Figure MAX1132 Board Layout-Solder Side
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 2001 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

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