MAX2242XSEVKIT#

Click here to ask an associate for production status of specific part numbers. Evaluates: MAX22420, MAX22421, MAX22820, MAX22821 General Description The MAX22420/MAX22421 evaluation kits (EV kits) provide a proven design to evaluate the MAX22420/1 and MAX22820/1, a family of reinforced, ultra-low-power, twochannel digital isolators in an 8-pin NSOIC or 8-pin WSOIC package, respectively. Two types of evaluation boards are available to support all variants in the family in both 1/1 and 2/0 configurations. The MAX22421BSEVKIT# is fully assembled and tested, and it comes populated with the MAX22421BASA+ (Figure 1). The MAX2242XSEVKIT# is a generic board that has U1 unpopulated, allowing the user to select a device from the MAX22420/MAX22421 family (Figure 2). Both the evaluation boards support the 8-pin NSOIC package type only. See Table 1 EV kit options. The MAX22820/MAX22821 is functionally equivalent to the MAX22420/MAX22421 but in an 8-pin WSOIC package. The EV kits can be used to evaluate the functionality and electrical performance of the MAX22820/ MAX22821. The EV kits should be powered from two independent isolated power supplies with nominal output voltage in the range of 1.71V 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. MAX22420/MAX22421 Evaluation Kit The MAX2242XSEVKIT# comes with U1 unpopulated and supports the following digital isolators: MAX22420BASA+, MAX22420CASA+, MAX22420EASA+, MAX22420FASA+, MAX22421BASA+, MAX22421CASA+, MAX22421EASA+, and MAX22421FASA+. Note: When ordering the MAX2242XS EV kit, the engineer should request a sample of the desired MAX22420/1 isolator IC that can be soldered to the PCB. Features • • • • • • • • Ultra-Low-Power Operation Data Transfer Rates up to 10Mbps MAX22420 with 2:0 Channel Configuration MAX22421 with 1:1 Channel Configuration SMA Connectors for Easy Connection to External Equipment Wide Power Supply Voltage Range from 1.71V to 5.5V Guaranteed up to 3kVRMS Isolation for the 60s -40°C to +125°C Temperature Range Proven PCB Layout Ordering Information appears at end of data sheet. EV Kit Photos Figure 1. MAX22421BS EV kit 319-100887; Rev 0; 2/22 Figure 2. MAX2242XS EV kit MAX22420/MAX22421 Evaluation Kit Evaluates: MAX22420, MAX22421, MAX22820, MAX22821 Quick Start Required Equipment • • • • • MAX22421BS or MAX2242XS EV kit MAX22420/MAX22421 device if U1 is not populated on the EV kit Two DC power supplies with an output range of 1.71V to 5.5V Signal/function generator Oscilloscope Procedure The MAX22421BS EV kit is fully assembled and ready for evaluation. The MAX2242XS EV kit has everything except the DUT (U1) installed. The user can install the desired version of the MAX22420/MAX22421 family of ultra-low-power reinforced digital isolators. Once installed, follow these steps to verify board functionality: 1. Connect one DC power supply between the EV kit’s VDDA and GNDA test points; connect the other DC power supply between the VDDB and GNDB test points. 2. Set both DC power supply outputs between 1.71V 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. 3. Connect the signal/function generator to an input SMA connector or test point of side A and observe the isolated signal on the corresponding side B output using an oscilloscope. On the MAX22421BS EV kit, SMA connectors A2 and B1 are inputs, and SMA connectors A1 and B2 are outputs. See Table 2 for the SMA connector I/O configurations for different MAX22420/1 devices on the MAX2242XS EV kit. Table 1. EV Kit Options EVKIT PART # TARGET DEVICE PACKAGE TYPE COMMENT MAX22421BSEVKIT# MAX22421BASA+ 8-pin NSOIC IC Populated MAX2242XSEVKIT# Not Populated 8-pin NSOIC Request Samples of Target Device from Factory Table 2. MAX22421BS and MAX2242XS EV Kits Connector Configurations CONNECTOR U1 DEVICE SHUNT POSITION MAX22420 MAX22421 SIDE A A1 (SMA) IN1 OUT1 A2 (SMA) IN2 IN2 REFA1 (SMA) — REFA2 (SMA) I/O on side A 1 J1 I/O on side A Test point or input header for VDDA. 2 Test point or input header for I/O; same as A1 SMA. 3 Test point or input header for I/O; same as A2 SMA. 4 Test point or input header for GNDA. SIDE B B1 (SMA) B2 (SMA) REFB1 (SMA) www.analog.com — OUT1 IN1 OUT2 OUT2 I/O on side B Analog Devices | 2 MAX22420/MAX22421 Evaluation Kit REFB2 (SMA) I/O on side B 1 J2 Evaluates: MAX22420, MAX22421, MAX22820, MAX22821 Test point or input header for VDDB. 2 Test point or input header for I/O; same as B1 SMA. 3 Test point or input header for I/O; same as B2 SMA. 4 Test point or input header for GNDB. Detailed Description of Hardware The MAX22420/MAX22421 EV kits allow the user to evaluate the features of the MAX22420/MAX22421 and MAX22820/ MAX22821, a family of reinforced, ultra-low-power, two-channel, galvanic digital isolators. External Power Supplies The Power to the MAX22421BS and MAX2242XS EV kits is derived from two external sources which can both be between +1.71V and +5.5V. Connect one source between the VDDA and GNDA test points, and the other source between the VDDB and GNDB test points. Each supply can be set independently and can be present over the entire range from +1.71V to +5.5V, regardless of the level or presence of the other supply. The device level-shifts the data, transmitting them across the isolation barrier. Two SMA connectors on each side of the board allow easy connections to signal generator(s) and an oscilloscope. A typical test setup is shown in Figure 3. DC POWER SUPPLY DC POWER SUPPLY 1.71V TO 5.5V 1.71V TO 5.5V – + + – OSCILLOSCOPE SIGNAL GENERATOR OUT Figure 3. MAX22421BS EV kit typical test setup www.analog.com Analog Devices | 3 MAX22420/MAX22421 Evaluation Kit Evaluates: MAX22420, MAX22421, MAX22820, MAX22821 Decoupling Capacitors Each power supply is decoupled with a 1μF ceramic capacitor in parallel with a 0.1μF ceramic capacitor, which is placed close to the U1 VDDA and VDDB pins. I/O Traces Impedance Control The input and output traces of both isolation channels have an impedance control of 50Ω. A 20Ω series resistor is added to both input and output channels; along with the internal series resistance, it can provide 50Ω impedance matching with external equipment such as function generators or oscilloscopes. Output Load Each output has an unpopulated 0402 SMT resistor (RA1, RA2, RB1, RB2) and an unpopulated 0402 SMT capacitor (CA1, CA2, CB1, CB2) to GND_ to allow different loads based on customer requirements. Calibration Channels Two reference channels (REFA1−REFB1, REFA2−REFB2) are implemented on the EV kits to help calibrate the test setup for timing measurements such as propagation delay. Measure the propagation delay (tPD_REF) using the reference channel first to determine the delay introduced by the test setup. Measure the propagation delay (tPD_ISO) again using one of the MAX22420/1 data channels. The calibrated isolator delay is tPD_ISO - tPD_REF. U1 on the MAX2242XS EV Kit U1 on the MAX2242XSEVKIT# is not installed. The user can install the desired version of MAX22420 or MAX22421. The MAX22420 features both channels transferring digital signals in one direction. SMA connectors A1 and A2 on side A are input connectors, B1 and B2 on side B are output connectors if the MAX22420 is installed as U1. The MAX22421 has one channel transmitting data in one direction and the other channel transmitting in the opposite direction. SMA connectors A2 and B1 are input connectors, A1 and B2 are output connectors if the MAX22421 is installed as U1. See Table 2 for SMA connector I/O configurations with different U1 selections. When installing U1, make sure pin 1 of the device is mounted onto pin 1 of U1 on the PCB. Pin 1 is located at the upper left corner of U1, denoted by a white dot on the silkscreen. Ordering Information PART TYPE MAX22421BSEVKIT# EV kit Installed with MAX22421BASA+ MAX2242XSEVKIT# EV Kit for 8-pin NSOIC Package #Denotes RoHS-compliance. www.analog.com Analog Devices | 4 MAX22420/MAX22421 Evaluation Kit Evaluates: MAX22420, MAX22421, MAX22820, MAX22821 MAX22420/MAX22421 EV Kit Bill of Materials ITEM REF_DES DNP QTY MFG PART # MANUFACTURER VALUE DESCRIPTION 1 A1, A2, B1, B2, REFA1, REFA2, REFB1, REFB2 — 8 142-0701-851 JOHNSON COMPONENTS 142-0701-851 CONNECTOR; END LAUNCH JACK RECEPTACLE; BOARDMOUNT; STRAIGHT THROUGH; 2PINS; 2 CC0603KRX7R0BB104; GRM188R72A104KA35; HMK107B7104KA; 06031C104KAT2A; GRM188R72A104K YAGEO; MURATA; TAIYO YUDEN; AVX; MURATA 0.1UF 2 GRM21BR71H105KA12; CL21B105KBFNNN; C2012X7R1H105K085AC; UMK212B7105KG MURATA; SAMSUNG ELECTRONICS; TDK; TAIYO YUDEN 1UF CAP; SMT (0805); 1UF; 10%; 50V; X7R; CERAMIC 2 3 C1, C2 C3, C4 — — CAP; SMT (0603); 0.1UF; 10%; 100V; X7R; CERAMIC 4 GNDA, GNDB — 2 5011 KEYSTONE N/A TEST POINT; PIN DIA=0.125IN; TOTAL LENGTH=0.445IN; BOARD HOLE=0.063IN; BLACK; PHOSPHOR BRONZE WIRE SILVER PLATE FINISH; RECOMMENDED FOR BOARD THICKNESS=0.062IN; NOT FOR COLD TEST 5 J1, J2 — 2 5-146128-2 TE CONNECTIVITY 5-146128-2 CONNECTOR; HEADER ASSEMBLY; BREAKAWAY MALE; SMT; STRAIGHT; 4PINS 6 MTH1-MTH4 — 4 9032 KEYSTONE 9032 MACHINE FABRICATED; ROUNDTHRU HOLE SPACER; NO THREAD; M3.5; 5/8IN; NYLON 7 R1-R4 — 4 CRCW040220R0FK VISHAY DALE 20 8 U1 — 1 MAX22421BASA+ MAXIM MAX22421BASA+ RES; SMT (0402); 20; 1%; +/-100PPM/DEGC; 0.0630W EVKIT PART - IC; MAX22421; ULTRA-LOW POWER 2CH REINFORCED DIGITAL ISOLATOR; PACKAGE LAND PATTERN: 90-0096; NSOIC8 9 VDDA, VDDB — 2 5010 KEYSTONE N/A TEST POINT; PIN DIA=0.125IN; TOTAL LENGTH=0.445IN; BOARD HOLE=0.063IN; RED; PHOSPHOR BRONZE WIRE SIL; NOT FOR COLD TEST 10 PCB — 1 MAX2242XS MAXIM PCB PCB:MAX2242XS 11 CA1, CA2, CB1, CB2 DNP 4 N/A N/A OPEN PACKAGE OUTLINE 0402 NONPOLAR CAPACITOR - EVKIT 12 RA1, RA2, RB1, RB2 DNP 4 N/A N/A OPEN PACKAGE OUTLINE 0402 RESISTOR - EVKIT www.analog.com Analog Devices | 5 MAX22420/MAX22421 Evaluation Kit Evaluates: MAX22420, MAX22421, MAX22820, MAX22821 MAX22420/MAX22421 EV Kit Schematic Diagram www.analog.com Analog Devices | 7 MAX22420/MAX22421 Evaluation Kit Evaluates: MAX22420, MAX22421, MAX22820, MAX22821 MAX22420/MAX22421 EV Kit PCB Layout Diagrams MAX22420/MAX22421 EV Kit PCB Layout —Top Silkscreen www.analog.com MAX22420/MAX22421 EV Kit PCB Layout—Top Layer Analog Devices | 9 MAX22420/MAX22421 Evaluation Kit MAX22420/MAX22421 EV Kit PCB Layout—Layer 2 GND www.analog.com Evaluates: MAX22420, MAX22421, MAX22820, MAX22821 MAX22420/MAX22421 EV Kit PCB Layout—Layer 3 PWR Analog Devices | 10 MAX22420/MAX22421 Evaluation Kit Evaluates: MAX22420, MAX22421, MAX22820, MAX22821 MAX22420/MAX22421 EV Kit PCB Layout—Bottom Layer www.analog.com Analog Devices | 11 MAX22420/MAX22421 Evaluation Kit Evaluates: MAX22420, MAX22421, MAX22820, MAX22821 Revision History REVISION NUMBER 0 REVISION DATE 02/22 Initial release DESCRIPTION PAGES CHANGED — Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. w w w . a n a l o g . c o m Analog Devices | 12