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MAX5422 Datasheet(PDF) 8 Page - Maxim Integrated Products |
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MAX5422 Datasheet(HTML) 8 Page - Maxim Integrated Products |
8 / 13 page The MAX5422 main circuit area consists of the MAX5422 IC U1, decoupling capacitors C25 and C26, jumpers JU1, JU2, and JU3, header J2, and PCB pads H, W, L, VCC, and GND. The MAX5422 main circuit PCB section is less than 1.2in x 1.1in and can be sepa- rated from the EV kit using the cutout slots, allowing the MAX5422 to be conveniently attached to a user appli- cation. After separation, the two parts of the EV kit can be reconnected using a short cable. A short ribbon cable of about 3in is recommended to reconnect the MAX5422 EV kit. A Samtec IDSS-06-D-3.00 ribbon cable can be used to connect header J1 odd pins to header J2 odd pins. Jumper Selection Using an External DC Power Supply The MAX5422 EV kit can be powered by an external 2.7V to 5.25V DC power supply. The EV kit can still be programmed through the USB interface using the soft- ware GUI. To connect the EV kit to an external power supply, disconnect the USB cable and install a shunt on pins 2-3 of jumper JU1. Turn off the power supply and connect the power-supply ground terminal to the EV kit GND pad, and the power-supply positive terminal to the VCC pad. Table 2 lists the various options for powering the MAX5422 EV kit. SPI Clock and Data/Chip Select Inputs The MAX5422 features a clock and data/chip select input pins for SPI-compatible communication to control the MAX5422 wiper position and transfer data between volatile and nonvolatile memories. The clock and data/chip select pins can be driven by the on-board USB interface circuit or the PCB header (J2), along with a user-supplied exter- nal SPI-compatible controller. An external SPI-compatible controller can be connected to the SCLK (J2-6), DIN (J2- 8), CS (J2-10), and GND (J2-12) on header J2 to commu- nicate with the MAX5422 IC. When using an external SPI- compatible controller, disconnect the on-board USB inter- face circuit by removing all the shunts from header J1. Headers J1 and J2 select the SPI serial-interface signal- control sources for the MAX5422 IC. Table 3 lists the various options for configuring SPI input signal controls. MAX5422 Evaluation Kit 8 _______________________________________________________________________________________ Table 2. JU1 Jumper Functions (VDD) SHUNT POSITION VDD PIN CONNECTED TO EV KIT POWERED FROM 1-2* 3.3V USB interface circuit 2-3 VCC External power supply (2.7V to 5.25V) Open Not connected Do not use (EV kit is not powered) * Default position. Table 3. J1, J2 Header Functions (+3.3V, VDD, SCLK, DIN, CS, GND) HEADER POSITION SHUNT POSITION EV KIT FUNCTION Installed* Connects +3.3V from USB interface to MAX5422 J1 (1-2) Not installed Disconnect +3.3V from USB interface to MAX5422 Installed* Connects VDD from MAX5422 to USB interface J1 (3-4) Not installed Disconnect VDD from MAX5422 to USB interface Installed* Connects SCLK from USB interface to MAX5422 J1 (5-6) Not installed Disconnect SCLK from USB interface to MAX5422 Installed* Connects DIN from USB interface to MAX5422 J1 (7-8) Not installed Disconnect DIN from USB interface to MAX5422 Installed* Connects CS from USB interface to MAX5422 J1 (9-10) Not installed Disconnect CS from USB interface to MAX5422 J1 (11-12) Not installed Shunt not required J2 (1-2) J2 (3-4) J2 (5-6) J2 (7-8) J2 (9-10) Not installed Do not install shunts on these pins. Shunts will short the power and signal lines to ground. J2 (11-12) Not installed Shunt not required * Default position. |
Similar Part No. - MAX5422_08 |
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Similar Description - MAX5422_08 |
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