Features. General Description. MAX14483 EV Kit Board Photo

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1 General Description The MAX448 evaluation kit (EV kit) provides a proven design to evaluate the MAX448, 6-channel,.75kV RMS, SPI digital isolator. The EV kit allows easy access to all six channels through either SMA connectors or test points. On-board LEDs on the ready signals (SAA and SBA) and FAULT output directly indicate the signals status. The EV kit should be powered from two independent isolated power supplies with nominal output voltage in range from.7v to 5.5V. For evaluating the electrical parameters of the device without any isolation between the two sides, a single power supply can also be used. The MAX448EVKIT# comes populated with the MAX448AAP+ installed in a -pin SSOP package with 5.5mm of creepage and clearance. Features Six Unidirectional Channels with Different Channel Direction Configuration and Data Speed (Up to 0Mbps) On-Board LEDs Indication of Device Ready for Communication SMA Connectors for Easy Connection to External Equipment Wide Power Supply Voltage Range from.7v to 5.5V Guaranteed Up to.75kv RMS Isolation for the -pin SSOP Package for 60s -40ºC to +5ºC Temperature Range Proven PCB Layout Fully Assembled and Tested Ordering Information appears at end of data sheet. MAX448 EV Kit Board Photo 9-006; Rev 0; /8

2 Quick Start Required Equipment MAX448 EV kit Two DC power supplies with output range of.7v to 5.5V Signal/function generator Oscilloscope Procedure The MAX448 EV kit is fully assembled and ready for evaluation. For manual verification follow the steps below to verify board functionality: ) Verify jumper settings. See Table for all shunt positions. J and J are closed. Jumper IRDYB is in - position, indicating side A ready for communication. Jumper SDOENB is in - position, enabling OSDO output. ) Connect one DC power supply between the EV kit s TP_ and TP_ test points; connect the other DC power supply between TP_ and TP_ test points. ) Set both DC power supply outputs between.7v and 5.5V, and then enable the power supply outputs. Note: It is also possible to power the EV kit from a single power supply to test electrical parameters but this invalidates the digital isolation of the IC. 4) Verify that yellow LEDs SAA and SBA are both on, indicating side A and side B are operating normally. 5) Connect the signal/function generator to ISDO SMA connector or HEADER Pin 4 and observe the isolated signal on the OSDO SMA connector or HEADER Pin 4 using an oscilloscope. 6) Repeat the step 5 to verify the functionality of FAULT, AUX, SDI, SCLK, and CS channels. Note that OFAULT is an open drain output and has a 0kΩ pullup resistor. Table. MAX448 EV Kit Connectors and Shunt Positions CONNECTOR SHUNT POSITION DESCRIPTION HEADER SIDE A Test point or input header for V DDA Test point or input header for side A ready pin IRDY; same as IRDYB jumper pin Test point or input header for FAULT channel; same as IFAULTB SMA 4 Test point or input header for SDO channel; same as ISDO SMA 5 Test point or output header for AUX channel; same as OAUX SMA 6 Test point or output header for SDI channel; same as OSDI SMA 7 Test point or output header for SCLK channel; same as OSCLK SMA 8 Test point or output header for CS channel; same as OCSB SMA 9 Test point or output header for side B active pin SBA; same as TP_SBA 0 Test point or input header for IFAULTB n/a SMA connector for FAULT channel input IFAULT ISDO n/a SMA connector for SDO channel input ISDO OAUX n/a SMA connector for AUX channel output OAUX OSDI n/a SMA connector for SDI channel output OSDI OSCLK n/a SMA connector for SCLK channel output OSCLK OCSB n/a SMA connector for CS channel output OCS J IRDYB Open Use current meter to measure current of side A power supply V DDA -* Connect power supply to V DDA - Connect side A ready input IRDY to V DDA ; when IRDY is high, SAA is low and side B outputs are in default state (OFAULT is low and OSDO is low when enabled). -* Connect side A ready input IRDY to ; when IRDY is low, and side A power is valid, SAA is high and side B outputs operate normally. Maxim Integrated

3 Table. MAX448 EV Kit Connectors and Shunt Positions (continued) CONNECTOR SHUNT POSITION DESCRIPTION HEADER *Default configuration SIDE B Test point or input header for V DDB Test point or output header for side A active pin SAA; same as TP_SAA Test point or output header for FAULT channel; same as OFAULTB SMA 4 Test point or output header for SDO channel; same as OSDO SMA 5 Test point or input header for AUX channel; same as IAUX SMA 6 Test point or input header for SDI channel; same as ISDI SMA 7 Test point or input header for SCLK channel; same as ISCLK SMA 8 Test point or input header for CS channel; same as ICSB SMA 9 Test point or input header for OSDO enable pin SDOEN; same as SDOENB jumper pin 0 Test point or input header for OFAULTB n/a SMA connector for FAULT channel output OFAULT OSDO n/a SMA connector for SDO channel output OSDO IAUX n/a SMA connector for AUX channel input IAUX ISDI n/a SMA connector for SDI channel input ISDI ISCLK n/a SMA connector for SCLK channel input ISCLK ICSB n/a SMA connector for CS channel input ICS J SDOENB Open Use current meter to measure current of side B power supply V DDB -* Connect power supply to V DDB - Connect OSDO enable SDOEN to V DDB ; When both SDOEN and ICS are high, the OSDO output is high-impedance. -* Connect OSDO enable SDOEN to ; When SDOEN is low, the OSDO output is enabled. Table. MAX448 EV Kit Test Points TEST POINT TP_ TP_ TP_ TP_SBA TP_ TP_ TP_ TP_SAA Test point for V DDA Test point for Test point for Test point for side B active SBA Test point for V DDB Test point for Test point for Test point for side A active SAA SIDE A SIDE B DESCRIPTION Maxim Integrated

4 Detailed Description of Hardware The MAX448 EV kit allows the user to evaluate the features of the MAX448 6-channel SPI isolator. External Power Supplies Power to the MAX448 EV kit is derived from two external sources which can both be between +.7V and +5.5V. Connect one source between the V DDA and test points, and the other source between the V DDB and test points. Each supply can be set independently and can be present over the entire range from.7v to 5.5V, regardless of the level or presence of the other supply. The MAX448 level-shifts the data, transmitting them across the isolation barrier. Six SMA connectors on each side of the board allow easy connections to signal generator(s) and oscilloscope. A typical test setup is shown in Figure. DC POWER SUPPLY.7V TO 5.5V DC POWER SUPPLY.7V TO 5.5V OSCILLOSCOPE SIGNAL GENERATOR OUT Figure. MAX448 EV Kit Typical Test Setup Maxim Integrated 4

5 Decoupling Capacitors Each power supply is decoupled with a 0µF ceramic capacitor in parallel with a 0.µF ceramic capacitor, which are placed close to the U V DDA and V DDB pin. Shunt Positions Jumpers J and J are installed between the external power supplies and U power supply pins to allow supply current measurement. Uninstall the J and J shunts and connect current meters on both side A and side B to measure the MAX448 supply current. Jumper IRDYB is provided to configure if side A is ready for communication. When the IRDYB shunt is connected to V DDA (IRDY is high), side A active SAA is low and side B outputs are in their default state (OFAULT is low and OSDO is low when enabled). When the IRDYB shunt is connected to (IRDY is low), and side A power is valid, SAA is high and side B outputs operate normally. Jumper SDOENB is provided to enable or disable the SDO channel ouput (OSDO). When the SDOENB shunt is connected to, the OSDO output is enabled. When the SDOENB shunt is connected to V DDB, and ICS is high, the OSDO output is high-impedance. Note that when ICS is low, OSDO output is always enabled. See Table for all shunt positions. Impedance Control The input and output traces of all six isolation channels have an impedance control of 50Ω. A Ω series resistor is added to all input and output channels. Along with internal series resistance, it can provide 50Ω impedance matching with external equipment such as function generator or oscilloscope. Output Load Each output has an unpopulated 060 SMT resistor (RL- RL6) and an unpopulated 060 SMT capacitor (CL CL6) to GND_ to allow different loads based on customer requirements. Calibration Channels Two reference channels (REFA-REFB, REFA-REFB) are implemented on the EV kit to help calibrate the test setup for timing measurements such as propagation delay. Measure the propagation delay (t PD_REF ) using the reference channel first to determine the delay introduced by the test setup. Measure the propagation delay (t PD_ISO ) again using one of the MAX448 data channels. The calibrated isolator delay is t PD_ISO - t PD_REF. Ordering Information PART MAX448EVKIT# #Denotes RoHS compliant. EV Kit TYPE Maxim Integrated 5

6 MAX448 EV Kit Bill of Materials ITEM REF_DES QTY MFG PART # MANUFACTURER VALUE DESCRIPTION COMMENTS GCJ88R7H04KA; CAPACITOR; SMT (060); CERAMIC CHIP; 0.UF; 50V; TOL=0%; TG=- C, C GCM88R7H04K; MURATA; TDK 0.UF 55 DEGC TO +5 DEGC; TC=X7R; AUTO CGAEX7RH04K080AA C, C4 CLB06KOQNNN FAULTB HSMH-C90 SAMSUNG ELECTRONICS AVAGO TECHNOLOGIES 0UF HSMH-C90 4 HEADER, HEADER TE CONNECTIVITY CAPACITOR; SMT (0805); CERAMIC CHIP; 0UF; 6V; TOL=0%; TG=-55 DEGC TO +5 DEGC; TC=X7R DIODE; LED; SURFACE MOUNT CHIP LED; RED; SMT (060); PIV=.8V; IF=0.0A CONNECTOR; MALE; SMT; AMPMODU II PIN HEADER; SINGLE ROW; PACKED IN BLISTER; STRAIGHT; 0PINS 5 IAUX, ICSB, ISDI, ISDO, OAUX, OCSB, OSDI, OSDO, ISCLK, OSCLK, REFA, REFA, REFB, REFB, IFAULTB, OFAULTB 6 JOHNSON COMPONENTS CONNECTOR; END LAUNCH JACK RECEPTACLE; BOARDMOUNT; STRAIGHT THROUGH; PINS; 6 IRDYB, SDOENB PEC0SAAN SULLINS PEC0SAAN CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT; PINS 7 J, J PEC0SAAN SULLINS PEC0SAAN CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT; PINS 8 Q, Q BSS4N INFINEON BSS4N 9 Q PMV65XP NXP PMV65XP TRAN; OPTIMOS SMALL SIGNAL TRANSISTOR; NCH; PG-SOT ; PD- (0.5W); I-(.5A); V-(V) TRAN; V; SINGLE P-CHANNEL TRENCH MOSFET; PCH; SOT-; PD- (0.48W); I-(-4.A); V-(-V) 0 R, R, R5 CRCW04000KFK; RC040FR- VISHAY DALE; YAGEO 0700KL PHICOMP 00K RESISTOR; 040; 00K; %; 00PPM; 0.065W; THICK FILM R, R4, R6 CRCW040470RFKEDHP VISHAY DRALORIC 470 RESISTOR; 040; 470 OHM; %; 00PPM; 0.5W; THICK FILM R7 ERJ-RKF00 PANASONIC 0K RESISTOR; 040; 0K OHM; %; 00PPM; 0.0W; THICK FILM RA-RA6, RB-RB6 CRCW040R0FK VISHAY DALE RESISTOR; 040; OHM; %; 00PPM; 0.06W; THICK FILM DIODE; LED; LY L9K SERIES; SMARTLED; YELLOW; SMT (608); 4 SAA, SBA LY L9K-HK-6-Z OSRAM LY L9K-HK-6-Z VF=.8V; IF=0.0A 5 SU-SU4 4 STC0SYAN SULLINS ELECTRONICS CORP. STC0SYAN TEST POINT; JUMPER; STR; TOTAL LENGTH=0.56IN; BLACK; INSULATION=PBT CONTACT=PHOSPHOR BRONZE; COPPER PLATED TIN OVERALL 6 TP_, TP_, TP_, TP_ KEYSTONE N/A TEST POINT; PIN DIA=0.IN; TOTAL LENGTH=0.IN; BOARD HOLE=0.04IN; BLACK; PHOSPHOR BRONZE WIRE SILVER PLATE FINISH; 7 TP_SAA, TP_SBA 500 KEYSTONE N/A 8 TP_, TP_ 5000 KEYSTONE N/A 9 U MAX448AAP+ MAXIM MAX448AAP+ TEST POINT; PIN DIA=0.IN; TOTAL LENGTH=0.IN; BOARD HOLE=0.04IN; WHITE; PHOSPHOR BRONZE WIRE SILVER; TEST POINT; PIN DIA=0.IN; TOTAL LENGTH=0.IN; BOARD HOLE=0.04IN; RED; PHOSPHOR BRONZE WIRE SILVER PLATE FINISH; EVKIT PART - IC; MAX448AAP+; 8-CHANNEL; LOW POWER;.75KVRMS; SPI DIGITAL ISOLATOR; PACKAGE OUTLINE DRAWING: ; LAND PATTERN: PCB MAX448 MAXIM PCB PCB:MAX448 - MTH-MTH6 DNI 6 90B GENERIC PART? STANDOFF; FEMALE-THREADED; HEX; 4-40IN; /8IN; NYLON MTH-MTH6 DNI 6 P GENERIC PART? MACHINE SCREW; SLOTTED; PAN; 4-40IN; /8IN; NYLON MTH-MTH6 DNI 6 EVKIT_STANDOFF_4-40_/8? EVKIT_STANDOFF_ KIT; ASSY-STANDOFF /8IN; PC. STANDOFF/FEM/HEX/4-4-40_/8 40IN/(/8IN)/NYLON; PC. SCREW/SLOT/PAN/4-40IN/(/8IN)/NYLON 4 RL-RL6 DNP 0 N/A N/A PACKAGE OUTLINE 040 RESISTOR 5 CL-CL6 DNP 0 N/A N/A PACKAGE OUTLINE 040 NON-POLAR CAPACITOR TOTAL 8 Maxim Integrated 6

7 Maxim Integrated 7 MAX448 Evaluation Kit MAX448 EV Kit Schematic BSS4N HSMH-C90 LY L9K-HK-6-Z PEC0SAAN LY L9K-HK-6-Z 00K GNDF GNDF GNDF GNDF 0K 00K 0.UF 0UF 00K PEC0SAAN 0.UF 470 PMV65XP 0UF BSS4N MAX448AAP+ Q C4 FAULTB RB R IRDYB ISDO IFAULTB OAUX OSDI CL4 CL RL RL6 RL4 RL5 CL6 CL5 R REFB REFA REFB REFA IAUX OSDO CL CL RL RL OFAULTB R7 R4 R5 TP_SAA TP_ TP_ TP_ HEADER HEADER Q R6 SDOENB ISCLK ISDI RB6 RB5 RB4 RB RB SAA TP_SBA SBA OSCLK TP_ RA6 RA5 RA4 RA RA RA U C C J J TP_ TP_ ICSB C OCSB R Q SAA IRDYB IRDYB SDOEN SBA SAA C 5 4 K A K A A SAA OFAULT OSDO IAUX ISDI ISCLK ICS SDOEN SBA OCS OSCLK OSDI OAUX ISDO IFAULT IRDY G S D G S D G D S

8 MAX448 EV Kit PCB Layout Diagrams MAX448 EV Kit Top Silkscreen MAX448 EV Kit Top Maxim Integrated 8

9 MAX448 EV Kit PCB Layout Diagrams (continued) MAX448 EV Kit L GND MAX448 EV Kit L PWR Maxim Integrated 9

10 MAX448 EV Kit PCB Layout Diagrams (continued) MAX448 EV Kit Bottom MAX448 EV Kit Bottom Silkscreen Maxim Integrated 0

11 Revision History REVISION NUMBER REVISION DATE DESCRIPTION PAGES CHANGED 0 /8 Initial release For pricing, delivery, and ordering information, please contact Maxim Direct at , or visit Maxim Integrated s website at. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. 8 Maxim Integrated Products, Inc.