MAX4550 Evaluation MAX4550 evaluation kit) simplifies evaluation

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MAX4550 Evaluation MAX4550 evaluation kit) simplifies evaluation

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MAX4550 Evaluation
MAX4550 evaluation kit) simplifies evaluation MAX4550 dual crosspoint analog switch with 2-wire serial user interface. includes Windows software, which provides handy user interface exercising features MAX4550. This also used evaluate MAX4570. Simply order free sample MAX4570CWI along with MAX4550 kit. Proven Board Layout Audio Mode -95dB Typical Crosstalk 20kHz -110dB Typical Off-Isolation 20kHz (10k load) Video Mode -54dB Typical Crosstalk 4.0MHz -78dB Typical Off-Isolation 4.0MHz load) Total Harmonic Distortion (THD+N): 0.014% Easy-to-Use Software Included Fully Assembled Tested Surface-Mount Board
Features
Evaluates: MAX4550/MAX4570
Ordering Information
PART MAX4550EVKIT TEMP. RANGE +70°C PACKAGE
Component List
DESIGNATION C1-C4 C5-C8, C11, C12, C14, C10, R11, R12, R13, R21-R26, R30, R10, R14, R15, R17-R20 R27, R28, R32-R35 Q0-Q3 DESCRIPTION 2.2µF, ceramic capacitors Taiyo Yuden EMK316BJ225ML 0.1µF ceramic capacitors 4.7µF, tantalum capacitors DESIGNATION NO1A-NO4A, NO1B-NO4B, COM1A, COM2A, COM1B, COM2B JU9, JU14, JU16, JU17 JU15, JU18, JU19 None resistors resistors 47k, resistors 220, resistors LEDs None None DESCRIPTION
jacks
3-pin headers 2-pin headers Shunts (JU9, JU14, JU16-JU19) DB25 right-angle male connector MAX4550CWI 74HCT05 MAX4550 board Software disk, "MAX4550 EVALUATION KIT"
10k, resistors
Component Suppliers
SUPPLIER Taiyo Yuden PHONE 408-573-4150 408-573-4159
_Quick Start
MAX4550 fully assembled tested. Follow these steps verify board operation. Install MAX4550 software your computer running INSTALL.EXE floppy disk. This copies MAX4550 files creates icon program. Check jumper settings board. Refer Table
Note: Please indicate that using MAX4550 when contacting above component supplier.
Windows registered trademark Microsoft Corp.
Maxim Integrated Products
free samples latest literature: http://www.maxim-ic.com, phone 1-800-998-8800. small orders, phone 1-800-835-8769.
MAX4550 Evaluation Evaluates: MAX4550/MAX4570
Connect +4.75V +5.25V supply voltage between DGND pad. dualsupply operation, make sure that JU15 open; connect dual-supply voltages range ±2.7V ±5.25V pads, connect their ground pad. single-supply operation, refer Single-Supply Operation section. Connect 25-pin male-to-female extension cable from computer's parallel port DB25 connector kit. Start MAX4550 program opening icon Windows Start Menu. software selects correct port testing loopback. Apply input signal NO1A connect oscilloscope network analyzer COM1A. Verify switch operation opening closing NO1A-to-COM1A switch software user interface. Checkboxes control status (open closed) each switch.
Evaluating MAX4570
evaluate MAX4570, turn power kit, open JU16 JU17, replace with MAX4570CWI. other hardware changes necessary.
Table Jumper Functions
JUMPER JU1, JU20 STATE 2-3* (default trace) Open Closed* (default trace) JU2, JU4, JU6, Open JU3, JU21 2-3* (default trace) Open JU5, JU10-JU13 Closed* (default trace) Open Closed* (default trace) Open JU9, JU14 2-3* Open JU15 Closed Open* JU16 2-3* Open JU17 2-3* Open JU18 JU19 Closed* Open Closed* Open FUNCTION termination NO1A, NO2A referenced midsupply (for single-supply operation) termination NO1A, NO2A referenced leave open NO1A, NO2A, NO3A, NO4A DC-coupled MAX4550 inputs NO1A, NO2A, NO3A, NO4A AC-coupled MAX4550 inputs with 2.2µF ceramic capacitor termination NO1A, NO2A referenced midsupply (for single-supply operation) termination NO1A, NO2A referenced leave open NO3A, NO4A terminated with load NO3A, NO4A terminated with load NO1B, NO2B, NO3B, NO4B terminated with load NO1B, NO2B, NO3B, NO4B terminated with load connected through 0.1µF capacitor connected directly floating (can used ninth tenth inputs) tied GND, single-supply operation negative supply must provided user with MAX4550 with MAX4550 functions with MAX4570 with MAX4550 with MAX4550 functions DOUT; with MAX4570 BIASL tied BIASL floating BIASH tied BIASH floating
Indicates default jumper setting.
MAX4550 Evaluation
Detailed Description Software
Upon execution MAX4550 program, software determines whether MAX4550 MAX4570 installed. MAX4550 installed, software automatically resolves address MAX4570 installed, this step will performed). software enables command panel, after which user perform operations described below. upper-right corner user interface, along with address MAX4550. MAX4570 installed, software drives low, sends command data bytes, drives high. Note that inverted version DOUT serves input This connection allows software verify that MAX4570 present before issuing command.
Evaluates: MAX4550/MAX4570
Direct Command Entry
user enter command data bytes directly selecting "Cmd Entry" button. window appears containing edit fields corresponding command data bytes. execute command data bytes, enter each byte binary notation) into edit fields select "Execute." When finished, main MAX4550 user-interface window resumes control.
Command Panel
Each four inputs switch matrix plus input, connected either COM1A COM2A both). example, connect NO1A COM1A, check COM1A next NO1A "Switch Matrix panel. same procedure applies switches switch matrix midsupply biasing outputs, check next output "Output Biasing" panel. Make sure JU18 JU19 shunted, connecting BIASH BIASL GND. more details regarding output biasing, refer Output Biasing section MAX4550/MAX4570 data sheet. clickless operation outputs, check next output "Clickless Mode" panel. more details regarding clickless operation, refer MAX4550/MAX4570 data sheet. drive four auxiliary outputs high, check next output "Auxiliary Outputs" panel. Note that LEDs connected driving auxiliary output high will turn LED. more details regarding auxiliary outputs, refer MAX4550/MAX4570 data sheet. Selecting "Reset" button restores MAX4550 power-up state. power-up outputs connected shunt inputs with clickless mode enabled. auxiliary outputs output biasing disabled.
Detailed Description Hardware
Components
MAX4550 dual crosspoint switch array with 2-wire serial interface. R1-R16 termination resistors eight inputs. C1-C4 ACcoupling inputs MAX4550. R32-R35 allow midsupply biasing NO1A NO2A. LEDs (Q0-Q3) connected through four auxiliary outputs MAX4550 through resistors. 74HCT05 (U2), open-drain inverter, implements 2-wire serial interface. logic family ensures that MAX4550 output logic high even when operating 2.7V. RCA-type jacks facilitate audio/video evaluation MAX4550.
Input Termination
eight MAX4550 inputs configured termination. terminate input 10k, jumper connecting termination GND. Refer Table schematic identify correct jumpers.
Serial Communications Interface
When user checks checkbox, MAX4550 software determines command data code bytes corresponding selected function. MAX4550 installed, software issues start condition address byte, after which MAX4550 issues acknowledge pulse. software then sends command data bytes, each followed acknowledge pulse from MAX4550. software completes transfer issuing stop condition. command data bytes generated will displayed
AC-Coupled Inputs
four switch matrix inputs configured AC-coupling input signals. AC-couple input, jumper shunting 2.2µF input capacitor. Refer Table schematic identify correct jumpers. termination also selected AC-coupled input, 2.2µF capacitor resistor will form highpass network with cutoff frequency 7Hz, enough pass frequencies audio band.
MAX4550 Evaluation Evaluates: MAX4550/MAX4570
Improving Off-Isolation
inputs used improve off-isolation. Suppose COM1A must remain while other outputs being driven. improve off-isolation COM1A, connect with select checkbox close switch between COM1A. Note that COM1A output biasing enabled, must positioned connect 0.1µF capacitor. Refer Table identify correct jumper positions. more information regarding output biasing, refer Output Biasing section MAX4550 data sheet.
Input Biasing
Note that MAX4550 does include internal midsupply biasing option inputs. MAX4550 includes optional midsupply biasing NO1A NO2A inputs. bias NO1A midsupply, first traces connecting pins jumpers JU3. termination midsupply, connect pins jumper JU1; termination midsupply, connect pins jumper JU3. Midsupply biasing NO2A controlled with jumpers JU20 JU21 similar manner.
Measuring Supply Current
measuring quiescent current MAX4550, sure account resistor voltage dividers formed R32-R35. Collectively, these resistors amount path from GND. addition, note that each draws about state.
Single-Supply Operation
single-supply operation, shunt JU15; this will short GND. Connect power-supply voltage between +2.7V +5.25V pads.
Address Selection (MAX4550 only)
specify selectable bits address byte, place jumpers JU16 JU17 positions corresponding desired address. Refer Table more information regarding configuration JU16 JU17.
Layout Considerations
MAX4550 layout optimized high-speed signals crosstalk, with careful attention given signal-path layout. Capacitance between input traces been minimized routing these traces apart from each other possible.
Output Biasing
MAX4550 internal bias network which four outputs connected. ensure that output connected bias network will biased midway between GND, shunt JU18 JU19. alternate bias voltages, remove JU18 JU19 apply bias voltages BIASH BIASL pads.
4.7µF 0.1µF COM1A A1/DOUT DOUT JP1-13 A0/CS JP1-1 74HCT05 0.1µF JP1-18 JP1-20 JP1-21 JU19 SCL/SCLK JU18 A1/DOUT 74HCT05 AO/CS R20, R19, R18, R17, DGND SDA/DIN SDA/DIN 74HCT05 DATA_OUT SCL/SCLK 74HCT05 DATA_IN JP1-3 JP1-11 JU16 NO3B (SCLK) JU17 JU11 JU12 JU13 JU14 JU15 0.1µF 0.1µF VR34 4.7µF BIAS_NO2A 0.1µF NO4B NO2B (CS) JU10 NO1B (DOUT) BIASL JP1-25 JP1-24 0.1µF BIASL NO4A JP1-23 BIASH BIASH 74HCT05 CLK_OUT JP1-2 JP1-22 4.7µF NO3A COM2B COM2B JP1-19 COM1B COM1B 74HCT05 JP1-10 JP1-5 LOOPBACK COM2A COM1A 0.1µF NO1A
BIAS_NO1A
NO1A
2.2µF BIAS_NO2A JU20 JU21 NO2A
MAX4550 COM2A (MAX4570)
NO2A
2.2µF
Figure MAX4550 Schematic
JP1-15 CLK_IN JP1-12 (DIN)
NO3A
2.2µF
NO4A
2.2µF
NO1B
NO2B
NO3B
NO4B
BIAS_NO1A
0.1µF
Evaluates: MAX4550/MAX4570
NOTE: JU1, JU3, JU20, JU21 EACH SHORTED TRACE) FROM
MAX4550 Evaluation
MAX4550 Evaluation Evaluates: MAX4550/MAX4570
1.0"
Figure MAX4550 Component Placement Guide-Component Side
MAX4550 Evaluation Evaluates: MAX4550/MAX4570
1.0"
Figure MAX4550 Board Layout-Component Side
MAX4550 Evaluation Evaluates: MAX4550/MAX4570
1.0"
Figure MAX4550 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 1999 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

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