Evaluates: MAX14001 MAX14001PMB General Description Features The MAX14001 peripheral module provides the hardware Easy Evaluation of the MAX14001/MAX14002 to evaluate the MAX14001 isolated ADC to measure two 3.75kV Isolation for Both Data (SPI) and Power RMS channels of data, line voltage (up to 230V AC or 325V (DC-DC Supply) DC) and load current (up to 5A). All power and communication Peripheral Module Is Powered from a Single 3.3V is with a simple USB cableno separate field side power Supply (USB2PMB2 Is USB-Powered), No Field Side is required. The integrated DC-DC converter provides Supply Required power isolation for the system and powers all field-side circuitry. This integrated design reduces the BOM and Measure AC or DC, Voltages Up to 230V AC or board dimension for building an isolated ADC system. 325V DC and Current Up to 5A Refer to the MAX14001 IC data sheet for detailed Programmable Comparator Output information regarding operation of the IC. Works With USB2PMB2 Adapter and Munich GUI The MAX14001PMB has a 12-pin Pmod -compatible Software connector for SPI communication. The peripheral module Fully Assembled and Tested can be used in various ways. Maxim sells a low-cost Proven PCB Layout USB2PMB2 adapter board that uses the Munich GUI software for communication through a USB cable. This is RoHS Compliant not included with this board, but is available from Maxim or one of our distributors. Alternatively, any microcontroller Contents or FPGA with a 12-pin Pmod-compatible connector for MAX14001PMB, including two MAX14001s SPI communication can be used. Ordering Information appears at end of data sheet. MAX14001PMB Photo Pmod is a trademark of Digilent Inc. 19-8795 Rev 0 3/17Evaluates: MAX14001 MAX14001PMB the serial number in the USB2PMB2s list to connect the Quick Start software to communicate with that module. The software Required Equipment can only communicate to one module at a time. MAX14001PMB peripheral module Sample USB2PMB2 adapter board To start continuous monitoring, click the Sample Micro-USB cable Continuously button (see Figure 1). For a single status, Windows XP, Windows 7, Windows 8.1, or click the Sample Once button. Moving the cursor over the Windows 10 PC with a spare USB port graph area allows the user to select channel type (voltage or current), change scale, zoom, print, or save waveforms. Note: In the following sections, software-related items are identified by bolding. Text in bold refers to items directly Detailed Description of Hardware from the EV system software. Text in bold and underline The MAX14001PMB peripheral module has two refers to items from the Windows operating system. MAX14001 devices (U11 and U51). One channel is Procedure configured to measure the line voltage with maximum If the USB2PMB1 adapter is used, download software by voltage range selected by a resistor chain. The other channel is configured to measure the voltage across a following the steps below to get started: shunt resistor to provide load current. Both AC and DC 1) Visit www.maximintegrated.com/evkitsoftware to down- signals can be measured. No external field side (high load the latest version of the Munich GUI software, voltage) power is required as the MAX14001 has an version 2.12 or later, Munich GUISetupV2.12.ZIP. integrated, isolated DC-DC converter. The complete 2) Save the software to a temporary folder. Unzip the peripheral module is powered from a single 3.3V supply, .ZIP file and double-click the .EXE file to run the VDD, which is called the logic side (or low voltage side). installer. A message box asking Do you want to If the USB2PMB2 module is used this takes power from allow the following program to make changes to the 5V supply on the USB connector to the PC. The SPI- this computer can appear. If so, click Yes. compatible connector uses two chip-select signals (CS1 3) The installer includes the drivers for the hardware and and CS2) to control each chip through a single connector/ software. Follow the instructions on the installer and GUI interface. once complete, click Finish. The default location of the software is in the program files directory. MAX14001 Isolated ADC 4) Connect the MAX14001PMB Pmod connector X1 to The MAX14001 has a free-running, 10-bit SAR ADC, the connector on USB2PMB2. sampling at ~10ksps, that continously updates the data 5) Connect the USB2PMB2 to the PC with the Mini-USB register for each new conversion. If the source being cable. Windows should automatically recognize the monitored is DC or low-frequency AC (such as 50Hz or device and display a message near the System Icon 60Hz mains) this sample rate easily meets the Nyquist menu indicating that the hardware is ready to use. criteria and, although the two ADCs are not synchronized, 6) Once the hardware is ready to use, launch the the reading can be considered to be simultaneous given software. The status bar in the GUI should display the relatively high sample rate. Disconnected in the bottom right-hand corner. Go to The device digitizes the input voltage on the field side the Device tab to select the MAX14001PMB. and transmits the data across the isolation barrier to a Detailed Description of Software data receiver on the logic side which also has a program- mable comparator. The host can read the ADC value from Connect to Hardware the data receiver through the SPI interface. Additionally, The Device menu has options to search and connect to the comparator compares the digitized reading to the the hardware. Use the Scan Adapters option to search programmable thresholds and outputs high if data is for the USB2PMB2 modules connected to the PC. If above the upper threshold, and low if data is below the modules are found, the serial numbers of the modules lower threshold. This hardware feature is extremely use- are listed in the USB2PMB adapter drop-down list. Select Windows and Windows XP are registered trademarks and registered service marks of Microsoft Corporation. Maxim Integrated 2 www.maximintegrated.com