19-6332 Rev 0 5/12 MAX31723PMB1 Peripheral Module General Description Features The MAX31723PMB1 peripheral module provides the S Measures Temperatures from -55NC to +125NC necessary hardware to interface the MAX31723 digital S Thermometer Accuracy is Q0.5NC thermometer and thermostat to any system that utilizes S Thermometer Resolution is Configurable from PmodK-compatible expansion ports configurable for SPI 9 Bits to 12 Bits and/or GPIO communication. The IC provides tempera- S Thermostat Output with User-Defined Nonvolatile ture-to-digital conversion with no additional components. Thresholds Temperature readings are communicated from the device over an SPI interface or a 3-wire serial interface. The S SPI or 3-Wire Interface Selectable through choice of interface is selectable by the user. For appli- Jumpers cations that require greater temperature resolution, the S 6-Pin Pmod-Compatible Connector (SPI/GPIO) user can adjust the readout resolution from 9 bits to 12 S Example Software Written in C for Portability bits. This is particularly useful in applications where ther- mal runaway conditions must be detected quickly. The S RoHS Compliant thermostat has a dedicated open-drain output (TOUT). S Proven PCB Layout Two thermostat operating modes (comparator and inter- S Fully Assembled and Tested rupt) control thermostat operation based on user-defined nonvolatile trip points (T and T ). HIGH LOW Refer to the MAX31723 IC data sheet for detailed informa- Ordering Information appears at end of data sheet. tion regarding operation of the IC. MAX31723PMB1 Peripheral Module Pmod is a trademark of Digilent Inc. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.MAX31723PMB1 Peripheral Module Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION R1R4 4 150I Q5% resistors (0603) 0.1FF Q10%, 16V X7R ceramic C1 1 capacitor (0603) R5 1 4.7kI Q5% resistor (0603) Murata GRM188R71C104KA01D R6 1 10kI Q5% resistor (0603) 1FF Q10%, 10V X7R ceramic Digital thermometer and M C2 1 capacitor (0603) U1 1 thermostat (8 FMAX ) TDK C1608X7R1A105K Maxim MAX31723MUA+ J1 1 6-pin right-angle male header 3 Shorting jumpers 1 PCB: EPCB31723PM1 10-pin (2 x 5) straight male JP1 1 header Component Suppliers SUPPLIER PHONE WEBSITE Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com TDK Corp. 847-803-6100 www.component.tdk.com Note: Indicate that you are using the MAX31723PMB1 when contacting these component suppliers Table 1. Connector J1 Detailed Description (SPI/3-Wire Communication) SPI/3-Wire Interface PIN SIGNAL DESCRIPTION The MAX31723PMB1 peripheral module can plug directly Chip enable. Must be asserted high for into a Pmod-compatible port (configured for SPI/3-wire) 1 SS communication to take place for either through connector J1. For information on SPI and 3-wire the SPI or 3-wire interface. protocols, refer to the MAX31723 IC data sheet. The user selects between SPI and 3-wire communication protocols When SPI communication is selected, by setting the correct jumper configuration on JP2. See this pin is the serial-data input for the Figure 1 for proper jumper settings. 2 MOSI IC. When 3-wire communication is Connector J1 provides connection of the module to the selected, this pin carries bidirectional Pmod host. The pin functions and pin assignments adhere data between the host and the IC. to the Pmod standard recommended by Digilent. Note that When SPI communication is selected, when this module is operating in 3-wire mode, the host- this pin is the serial-data output for side interface must be configured as GPIO to allow for bit- 3 MISO the IC. When 3-wire communication is banged communication. 3-wire mode has the advantage selected, this pin carries the IC TOUT of freeing up an interface pin on the IC to allow for connec- signal. tion to the thermostat/alarm output. See Table 1. The JP1 jumper block is used to configure the communi- Serial clock. Used to synchronize data cation mode with the host board. The peripheral module 4 SCK movement on the serial interface for either the SPI or 3-wire interface. can communicate in either SPI or 3-wire mode. The cor- rect shunt settings are shown in Table 2 and Figure 1. 5 GND Ground 6 VCC Power supply MAX is a registered trademark of Maxim Integrated Products, Inc. Maxim Integrated Products 2