MAX147 Evaluation System/Evaluation MAX147 evaluation system syst
|
|
|
Top Searches for this datasheet
19-4751; 3/96
MAX147 Evaluation System/Evaluation
MAX147 evaluation system system) complete, low-cost, eight-channel data-acquisition system consisting MAX147 evaluation kit) Maxim 68HC16 80C32 microcontroller (µC) module. PC-compatible software provides handy user interface exercise MAX147's features. Source code provided. Order system comprehensive evaluation MAX147 using personal computer. Order 68HC16 80C32 module purchased previously with another Maxim system, custom other µC-based systems.
_Features
Evaluates: MAX147
Proven Board Layout Complete Evaluation System Convenient Test Points Provided On-Board Data-Logging Software Source Code Provided Fully Assembled Tested
_Ordering Information
PART MAX147EVKIT-DIP MAX147EVC16-DIP MAX147EVC32-DIP TEMP. RANGE +70°C +70°C +70°C BOARD TYPE Through-Hole Through-Hole Through-Hole
_Component List
DESIGNATION C7-C14 C15, C17-C20 JU1, JU2, R1-R8 R10-R13 R17, None None DESCRIPTION 0.01µF ceramic capacitors 0.1µF ceramic capacitors 4.7µF tantalum capacitor 10µF tantalum capacitor 0.047µF ceramic capacitor 2x20 right-angle socket 10-pin header 2-pin jumpers resistors 10k, 10-pin resistor pack Open 220k, resistor 180k, resistor 100k trim resistors 100, resistor Maxim MAX147BCPP Maxim MAX872CPA Maxim MAX393CPE Maxim MAX666CPA Maxim MAX495CPA 74HCT04 Maxim MAX494CPD board Software disk, MAX147 Evaluation
MAX147EVC16 _System Component List
DESCRIPTION MAX147 Evaluation (MAX147EVKIT-DIP) 68HC16 Module (68HC16MODULE-DIP)
MAX147EVC32 _System Component List
DESCRIPTION MAX147 Evaluation (MAX147EVKIT-DIP) 80C32 Module (80C32MODULE-DIP)
_MAX147 Stand-Alone
MAX147 provides proven board layout facilitate evaluation MAX147. must interfaced appropriate timing signals proper operation. Refer MAX147 data sheet timing requirements. MAX147 operates with either supply supply. kit's regulator powered user-supplied source. Trim sets actual voltage. adjustable from approximately 2.3V 3.6V. power supply already use, disable onboard regulator unplugging MAX666 from socket. Then connect supply input pad.
Maxim Integrated Products
free samples latest literature: http://www.maxim-ic.com, phone 1-800-998-8800
MAX147 Evaluation System/Evaluation Evaluates: MAX147
3V-Only Systems
systems, unplug MAX666 regulator connect your power supply input pad. Connect input pads each other power MAX393. (The MAX393 powered Detailed Description Hardware section.) development flexibility, uses MAX393 route EXTCOM signal input. Obtain DOUT SSTRB signals from header J18, from 40-pin connector (3V-only systems require 74HCT04 level translator). Start MAX147 software setting current directory match directory containing Maxim programs, then type program name MAX147. turn disconnect module while program running; will have restart program. program asks which module which port connected (the default 68HC16). 80C32 module, press select 80C32. Press space until correct serial port highlighted, press ENTER. MAX147 program terminalemulation mode.
Systems Using Logic
5V-logic systems, 74HCT04 translates MAX147's outputs levels. MAX147's input driven directly logic levels (obtain DOUT SSTRB signals from 40-pin connector). 5V-only applications, refer MAX186/MAX188 analog-to-digital converters.
_MAX147 System
MAX147 system operates from user-supplied power supply, from which generates supply board. regulator supplies power MAX147. level translators provided interface MAX147 with board.
_Quick Start
Copy files from distribution disk your hard disk blank floppy disks. Make sure that MAX147 software directory. necessary files root directory distribution disk, source code SOURCE subdirectory. SOURCE subdirectory required operate system. Carefully connect boards aligning MAX147 kit's 40-pin header with module's 40-pin connector. Gently press them together, that they flush against another. Connect power source module terminal block. This located next on/off switch, upper-right corner module. Observe polarity marked board. Connect cable from computer's serial port module. 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 selected.
Turn module's power. module displays log-on banner tests RAM. Download resident program module pressing ALT+L (i.e., hold down strike key). program prompts file name. Press ENTER download file. Press ALT+C switch control panel screen after resident program successfully downloaded. Apply input signals CH0-CH7 inputs edge MAX147 board. Observe readout screen. Table lists commands available from control panel screen. Before turning power MAX147 kit, exit program pressing ALT+X.
Detailed Description Software
Shutdown Power Cycling
From control panel, up/down arrow keys select power cycling mode. Power cycling puts MAX147 powerdown (FULLPD) mode between readings. MAX147 always fully powered during conversions.
Low-Speed Data Logging
RS-232 serial link limits data-logging sample rate more than 10sps (samples second). data-logging command used write data userspecified file plain comma-spaced-value text format. From control panel screen, press file already open, software asks file name. Only file allowed session. Once file open, press toggle data logging off.
MAX147 Evaluation System/Evaluation
With data logging enabled, "Logging" flashes screen. complete line data written after enabled channels sampled. first line file contains column headings. Each subsequent line file contains eight channels, separated commas. values written decimal output codes scaled voltages, depending which setting control panel currently displaying. commands select display format (Table data marker command, used sequentially different sections file indicate change setup input conditions. Pressing writes extra entry current line data log, indicate change setup input conditions.
Voltage
connected ground (default) usersupplied analog common voltage applied EXTCOM input pad. Press select desired connection. software measure user-applied voltage. When pressed from control panel screen (Table software connects EXTCOM input input channel Next, software connects ground. channel voltage measured single-ended unipolar mode. measurement performed several times averaged. After measuring external voltage, switches restored their previous configuration.
Evaluates: MAX147
High-Speed Data Sampling
command samples rates over samples second (sps). Data collected from only eight channels rate from 100sps 91ksps. First, select channel pressing number keys 0-7. Next, press specify name file into which samples should written. file already exists, screen displays "*** file already exists ***". begin collecting data, press After samples collected, data automatically uploaded host stored sample file.
Operating with QSPI, Bits Transfer
software program KIT147.S19 loaded into 68HC16 module uses 24-bits-per-transfer mode, which operates 59ksps throughput. Refer timing diagrams Clock Modes section MAX147 data sheet.
Table Recommended QSPI Setup Parameters Bits Transfer (used KIT147.S19)
PARAMETER SPBR CPOL CPHA BITS (1.68MHz) (clock idle low) (data stable clock rising edge) (when enabled) (7.6µs delay used internal clock mode) 0000 0000 1xxx xxyy (configure start conversion) 0000 0000 0000 0000 (read data) External clock: 1000 xxx0 (hold low). Internal clock: 1010 xxx0 (hold low; delay after transfer). 0100 xxx0 (16-bit enable) Received data, left justified, with leading zero VALUE
Controlling Sampling Rate
rate high-speed sampling, data logging, oscilloscope demo mode (Table controlled (delay between samples) command. When used with sample oscilloscope demo commands, specify approximate delay microseconds milliseconds typing then number, then "usec" "msec". Always verify timing using oscilloscope, since this delay linear code overhead. fast sampling screen oscilloscope demo mode delays from 100µs 1000µs. 68HC16 software supports delays between 68µs 1000ms. 80C32 software supports delays between 450µs 70ms. When used with slower data-logging command, specify delay seconds. delay between enabled channels, line data logged after enabled channels have been polled.
MAX147 Evaluation System/Evaluation Evaluates: MAX147
Operating with QSPI, Bits Transfer
program KIT14716.S19 demonstrates 16-bitsper-transfer interface scheme, which operates 91ksps throughput. this demonstration, held QSPI operates continuously background. Refer timing diagrams Clock Modes section MAX147 data sheet. this program, follow instructions Quick Start, step download KIT14716.S19 instead KIT147.S19. After loading, press ALT+C switch control panel.
Detailed Description Hardware
MAX147 board includes MAX666, configured regulator. Trim adjusts voltage between 2.3V 3.6V. MAX872 micropower 2.5V reference. MAX494 MAX495 low-voltage, rail-to-rail amps with 500kHz gain-bandwidth product. MAX495 buffers external input source. MAX494 used buffer some input signals. MAX393 analog switch allows software route MAX147 ground external input. addition, external input routed input channel Typical systems connect directly analog ground analog common voltage. MAX393 powered driven logic case with system), must powered 74HCT04 translates DOUT SSTRB signals from logic levels interfacing module. MAX147's logic inputs driven directly from logic levels.
Table Recommended QSPI Setup Parameters Bits Transfer (used KIT14716.S19)
PARAMETER SPBR CPOL CPHA BITS VALUE (1.68MHz) (clock idle low) (data stable clock rising edge) (7.6µs delay used internal clock mode) 0000 0001 xxxx xyy0 (configure start conversion) External clock: 1100 xxx0 (16-bit transfer). Internal clock: 1110 xxx0 (16-bit transfer with delay). Received data, left justified
_Input-Signal Buffering
analog-to-digital converter (ADC) inputs require sufficiently low-impedance source specified accuracy. inject small amount charge start acquisition time, source signal must recover within desired accuracy before acquisition time ends. source itself cannot this, buffer input signal. buffer CH4-CH7 input signals, unplug 14-pin header from install supplied MAX494 quad place. Note location toward upper right corner board. When using input buffer, buffer output cannot reach power-supply rails. MAX494 op-amp buffer installed input buffer grounded, buffered output will reach ground. MAX494 allows output signal within approximately 50mV either supply.
Changing Reference Voltage
MAX147 software assumes 2.5V reference voltage, unless otherwise specified. When using reference value other than 2.5V, specify value when starting program. example, VREF driven 2.048V reference, start MAX147 software typing:
MAX147 VREF 2.048 external reference's temperature coefficient must 20ppm/°C less achieve accuracy within four LSBs over +70°C temperature range. 12-bit accuracy over +70°C range, reference's temperature coefficient must 4ppm/°C less.
MAX147 Evaluation System/Evaluation Evaluates: MAX147
Table MAX147 Command Reference
ALT+T ALT+T FUNCTION Enables disables corresponding input channel software scans enabled channels. Displays conversion results decimal form. Delay between samples. Delays longer than second handled otherwise, module handles delay. Timing approximate should verified with oscilloscope. Enables disables data logging. command-line option specified, command prompts log-file name. Oscilloscope demo. Samples collected discarded fast possible. Observe waveforms timing with oscilloscope. Power-up delay. Timing approximate should verified with oscilloscope. When using external reference, power-up delay necessary should zero. Power-up delay used regardless which power-cycling mode selected. Samples eight inputs high speed. sampling rate controlled delays. program overhead, commands operate different rates. Timing should verified with oscilloscope. Displays conversion results volts. Selects input scale (unipolar, bipolar, unipolar differential, bipolar differential) enabled channels. Disabled channels unaffected. Writes marker into data-log file. Measures value user-applied voltage. Changes assumed value VREF. Changes assumed voltage COM. Selecting connects ground; selecting connects EXTCOM input pad. Internal clock mode External clock mode Selects power-down mode. Switches back terminal mode. Exits DOS.
Table Command-Line Options when Starting MAX147 Software
COMMAND MONO -Lfilename VREF FUNCTION Defaults COM1 serial port. Defaults COM2 serial port. with monochrome display. Opens file filename data logging enables data-logging commands. Specifies actual measured voltage VREF (nominally 2.5V). Specifies voltage pin. Lists command-line options.
Table Jumper Settings MAX147
JUMPER STATE Closed Open (default) Closed (default) Closed (default trace) Open Closed (default trace) Open Closed (default) FUNCTION Ties SHDN module. Forces SHDN float. operate with open. Current-sense jumper. MAX147 draws supply through this trace. operate with open. Switch drives COM. must driven external source. operate with open.
MAX147 Evaluation System/Evaluation Evaluates: MAX147
MAX494
BIN4 BIN7 0.1µF P1.2/SHDN SHDN SHDN C0MCHO EXTCHO R1-R8 C7-C14 0.01µF
BIN5 BIN6
EXTCOMFB EXTCOM 0.1µF BEXTCOM
HERE
0.1µF COM_SW TEST POINTS J18-1 J18-2 J18-3 J18-4 J18-5 J18-6 J18-7 J18-8 J18-9 COMCHO NORMAL COMCHO EXTCOM COMCHO SCLK SSTRB DOUT SHDN COMSEL COMCHO
MAX495
COMSEL COMSEL COMSEL EXTCOM
ADJUST RANGE 2.3V 3.6V, NOMINAL
MAX666
SENSE VOUT VSET SHDN
0.1µF 220k DEVICE 100k MAX393 74HCT04 MAX494 180k SUPPLY PINS
J18-10
1.3V
SOCKETED
74HCT04
74HCT04
Figure MAX147 Schematic
MAX147 Evaluation System/Evaluation Evaluates: MAX147
HERE SCLK SSTRB DOUT DGND AGND VDD146 10µF 0.1µF SCLK SSTRB DOUT 0.01µF REFADJ COMSEL SCLK VREF 0.1µF 4.7µF OPEN OPEN OPEN BDOUT J1-35 J1-36 J1-37 J1-38 MISO MOSI PCS0 2.5V NOMINAL OPEN P1.2/SHDN COMCHO BSSTRB BDOUT J1-27 J1-28 J1-29 J1-30 J1-31 J1-32 J1-33 J1-34 P10/BIP/UNI P11/SCLK P12/SHDN P13/SPARF P14/SSTRB P15/DOUT P16/CS P17/DIN J1-1 J1-2 J1-3 10-pin J1-4
MAX147
J1-7 J1-8
VDD/REFADJ SHDN VREF
SHDN
MAX872CPA
0.1µF VOUT COMP EXTVREF VREF 0.047µF 0.1µF
SCLK
DOUT
DOUT 74HCT04 74HCT04 SSTRB 74HCT04 74HCT04
BDOUT
SSTRB
BSSTRB
Figure MAX147 Schematic (continued)
MAX147 Evaluation System/Evaluation Evaluates: MAX147
Figure MAX147EV Component Placement Guide-Component Side
MAX147 Evaluation System/Evaluation Evaluates: MAX147
Figure MAX147EV Board Layout-Component Side
MAX147 Evaluation System/Evaluation Evaluates: MAX147
Figure MAX147EV Board Layout-Solder Side
MAX147 Evaluation System/Evaluation Evaluates: MAX147
Listing Using 68HC16 Read MAX147
MAX147 Evaluation System/Evaluation Evaluates: MAX147
Listing Using 80C32 Read MAX147
Other recent searches
SIL12-1A31-71L - SIL12-1A31-71L SIL12-1A31-71L Datasheet
SD1485 - SD1485 SD1485 Datasheet
NPT25015 - NPT25015 NPT25015 Datasheet
KM23V16205DSG - KM23V16205DSG KM23V16205DSG Datasheet
ISL45042 - ISL45042 ISL45042 Datasheet
HEF4024B - HEF4024B HEF4024B Datasheet
H78M06AT - H78M06AT H78M06AT Datasheet
H78M06BT - H78M06BT H78M06BT Datasheet
2SD1266 - 2SD1266 2SD1266 Datasheet
Privacy Policy | Disclaimer
© 2012 Datasheet Archive
