Evaluates: MAX1617A 19-2505 Rev 1 9/02 MAX1617A Temperature Sensor Evaluation Kit General Description Features The MAX1617A evaluation kit (EV kit) is a demonstration Measures and Displays Sensor Temperature platform for the MAX1617A temperature-sensor IC. It Simultaneously Monitors Package and a monitors both the junction temperature of the IC and the temperature of a remote (external) diode-connected Remote Sensor transistor, and converts these temperatures to 8-bit, Programs Alarms, Configuration, and Rate 2-wire serial data. A 2N3904 remote temperature-sensor transistor comes soldered to the board in a SOT23 Operating Temperature Ranges package, but for more realistic experiments, it can easily -55C to +125C (remote sensor) be removed and connected through a twisted pair to the 0C to +70C (board) DXP and DXN terminals. Easy to Use The EV kit is designed to be connected to a standard IBM-compatible PC parallel printer port. Signals from the Includes: Windows 95/98/2000 Software, Demo parallel port are converted to open-drain SMBus clock PC Board, 3.5 in. Floppy Disk and data by a 74HC05 logic chip on the board. An on- board MAX1615 linear regulator steps down the unregu- lated DC input to 5V to power the glue logic, the MAX1617A, and the SMBus pullup resistors. The software runs under Windows 95, 98, or 2000. Ordering Information This user-friendly program is menu-driven and offers a graphic user interface with control buttons and numeric PART TEMP RANGE IC PACKAGE data displays. Note: Windows 2000 requires the installa- MAX1617AEVKIT 0C to +70C 16 QSOP tion of a driver refer to Win2000.pdf or Win2000.txt located on the diskette. Component List Quick Start Recommended Equipment DESIGNATION QTY DESCRIPTION A computer running Windows 95, 98, or 2000 C1, C11, C13 3 0.1F, X7R ceramic capacitors (Note: Windows 2000 requires the installation of a C2 1 2200pF, X7R ceramic capacitor driver refer to Win2000.pdf or Win2000.txt located C12 1 4.7F, 10V tantalum capacitor on the diskette.) J1 1 D B25 mal e ri g ht-an g l e connector Parallel printer cable, straight-through 25-pin male- to-female type JU1, JU2 2 3-pin headers NPN transistor DC power supply, 9V at 50mA Q1 1 On Semiconductor MMBT3904 Procedure R1 1 6-pin SIP socket strip The MAX1617A EV kit is fully assembled and tested. R1 1 10k , 6-pin SIP resistor pack Follow the steps below to verify board operation. Do not R2 1 200 , 5% resistor turn on the power supply until all connections are completed: R11, R12 2 4.7k , 5% resistors 1) Set up the hardware. Connect the parallel cable to R13, R14, R15 3 47k , 5% resistors the computer port and to the EV kit board (or else SW1 1 Slide switch, 0,150 pitch simply plug the board directly into the port without U1 1 MAX1617AMEE the cable). The parallel port is typically labeled LPT MAX1615EUK or PRINTER. Adjust the power supply to 9V and DC U11 1 SOT top mark = ABZD connect it to the POS9 and ground terminals on the EV kit. Do not apply voltages higher than 28V. U12 1 74HCT05 open-drain hex inverter Windows is a trademark of Microsoft Corp. SMBus is a trademark of Intel Corp. Maxim Integrated Products 1 For free samples & the latest literature: MAX1617A Temperature Sensor Evaluation Kit 2) Install the software. The MAX1617A.EXE software Note that in places where the slave address asks for an can be run from the floppy or from a hard drive. 8-bit value, it must be the 7-bit slave address of the Simply use the Windows program manager to run MAX1617A as determined by ADD0 and ADD1 with the the program. Another autodetect routine attempts to last LSB bit always set to one. find the MAX1617A by cycling through the nine pos- Data Logging sible addresses. Data logging commands are accessed via the pull- After the parallel port and address are set up, the user- down menu labeled MAX1617A. Data logging saves interface panel appears. The MAX1617A is now operat- temperature data for both channels to a text file that ing in its default power-on-reset (POR) mode, auto-con- includes a time/date stamp next to each data point. At verting at a 0.25Hz rate. The display shows the current high conversion rates, not every data point is logged, temperature for both remote and local channels. depending on the speed of the disk drive where the file is being written. To stop data logging, select Logging Detailed Description from the pull-down menu. User-Interface Panel Jumper and Switch Settings The user interface is easy to operate use the mouse, or Two jumpers set the MAX1617A slave address. The press the Tab key to navigate with the arrow keys. Each default address is 0101 010 (ADD0 = ADD1 = high-Z) of the buttons corresponds to bits in the command, to get other settings, jumper JU1 and/or JU2 must be conversion-rate, and configuration bytes. Clicking on installed (Figure 1). JU1 responds to ADD0 and JU2 them generates the correct SMBus write operation to corresponds to ADD1 see Table 8 in the MAX1617A update the internal registers. The program continually data sheet for a complete list of slave addresses. The polls the device for new temperature data and status, MAX1617A must undergo a power-on reset for the new and alerts at a rate faster than the fastest conversion address to become effective. rate. To change the T and T alarm-threshold HIGH LOW comparison registers, select the appropriate data field A slide switch, SW1, is provided as a means to force a and type in the new value. Pressing Enter after typing in power-on reset of the MAX1617A. This switch simply the new values updates the internal registers. disables power to the device. To make single-shot conversions, click the Stop button The STBY hardware standby control input is hard-wired to under Configuration, and then click on the Measure V . In order to apply an external disabling signal to CC Now button. Single-shot conversions can also be per- STBY, the narrow PC board trace at JU3 must first be cut. formed while the device is auto-converting. The single- Figure 2 is a component placement guide. Figures 3 and 4 shot command overrides the automatic conversion. are the PC board layout. After the single shot is complete, the device returns to Operating Temperature Range automatic operation. The operating temperature range of this kit is 0C to If an interrupt condition is generated, typically by the +70C, although the MAX1617A itself is rated for -55C temperature crossing one of the alarm threshold levels, to +125C. The limitation is due to the maximum ratings a message appears in the alert box: ALERT INT = of other components on the board, such as the connec- LOW. To clear the interrupt, first eliminate the condition tor and the logic chips. Specifications aside, the board that caused it (typically by resetting the alarm threshold) can tolerate -55C to +125C temperatures. To facilitate and then click on Read Alert. This action reads the Alert testing the MAX1617A in a temperature chamber, cut Response address, returns the value of the current the PC board along the dotted line and attach wires MAX1617A slave address, and clears the interrupt. between the five terminals along the break. Thus, the MAX1617A can be heated or cooled without the parallel Simple SMBus Commands cable or interface in the chamber. There are two methods for communicating with the MAX1617A: via the normal user-interface panel, or via the simple SMBus commands available from the SMBus pulldown menu. To stop normal user-interface execution so that it does not override the manually set values, turn off the update timer that slaves the pro- gram to the conversion rate by clicking the Automatically Update Displays button. 2 Evaluates: MAX1617A