MAX12900EVKIT# Analog Devices

Evaluates: MAX12900 MAX12900 Evaluation Kit General Description Features The MAX12900 evaluation kit (EV kit) provides a proven Loop-powered 4mA20mA Transmitter with PWM Inputs design to evaluate the MAX12900, loop-powered Robust Operation with Wide Range Of Input Voltages 420mA sensor transmitter. The EV kit includes an On-Board Microcontroller to Generate Two PWM evaluation board and a graphical user interface (GUI) that Inputs and Provide Fault Diagnostic provides communication from a PC to the target device Supports HART and Fieldbus H1 Communication through a USB port. -40C to +125C Temperature Range The EV kit includes Windows 7, Windows 8, and Windows 10 compatible software for exercising the features Reverse Voltage Protection of the IC. The EV kit GUI allows to set the Coarse and Proven PCB Layout Fine PWM duty cycle inputs to the MAX12900 to control Fully Assembled and Tested the 4-20mA loop current with 1A resolution. Windows 7, Windows 8, and Windows 10 Compatible The EV kit must be powered from an external +24V power Software supply and consumes less than 2.7mA. The MAX12900 EV kit comes with a MAX12900ATJ+ installed in a 32-pin, 5 x 5mm TQFN-EP package. Ordering Information appears at end of data sheet. MAX12900 EV Kit INTERFACE AND MICROCONTROLLER TRANSMITTER Windows is a registered trademark and registered service mark of Microsoft Corporation. 319-100102 Rev 1 11/17Evaluates: MAX12900 MAX12900 Evaluation Kit MAX12900 EV System Block Diagram +5V +3.3V +24V VCCI VCC STM32L071 PWMA FT234xD USB to PC / USB MAX12931 UART MAX12900 PWMB OP3O UART DC GND OP3N OP3P RSENSE 2) Install the EV kit software on your computer by MAX12900 EV Kit Files running the MAX12900EVKITSetupV1.0.exe FILE DESCRIPTION program inside the temporary folder. The program files are copied to your PC and icons are created in Application Program MAX12900EVKITSetupV1.0.exe the Windows Start Programs menu. (GUI) 3) Verify that all jumpers are in their default positions (Table 1). Note the hardware is configured for com - Quick Start munication with a PC and onboard microcontroller by Required Equipment default. MAX12900 EV kit 4) Power up the EV kit with +24V from an external +24V DC power supply power supply through J3 Terminal Block or using LOOP+ and LOOP- test points. Connect an ampere Ampere meter meter in series with the power supply and external PC with installed Windows 7, Windows 8, or load. The load range is from 0 to 1k. Alternatively, Windows 10 and USB port use a voltmeter in parallel with the resistive load to Note: In the following section(s), software-related items calculate the loop current. are identified by bolding. Text in bold refers to items 5) Connect the EV kit to a USB port of a PC. A microUSB directly from the EV system software. Text in bold and cable is included. underline refers to items from the Windows operating 6) Start the EV kit software by opening its icon in the system. Start Programs menu. The EV kit software Procedure appears as shown in Figure 1. Verify that the lower-right The EV kit is fully assembled and tested. Follow the steps status bar indicates the EV kit hardware is Connected. The GUI automatically detects EV kit is connected below to verify board operation: to the PC, and enables communication with the on- 1) Visit www.maximintegrated.com/evkitsoftware to board microcontroller. It also retrieves calibration download the latest version of the EV kit software, coefficients from the onboard microcontroller EE - MAX12900EVKIT.ZIP. Save the EV kit software to a PROM and indicates them in the Status Log window. temporary folder and uncompress the ZIP file. Maxim Integrated 2 www.maximintegrated.com