ISL26134AV28EV1Z

USERS MANUAL ISL26134AV28EV1Z AN1672 Rev.2.00 Evaluation Board User Guide Jan 9, 2018 General Description Features Galvanically-isolated USB communication with PC The ISL26134AV28EV1Z provides a means to evaluate the functionality and performance of the ISL26134 A/D converter. On-board microcontroller The board includes an AT90USB162 microcontroller with a On-board voltage reference USB interface. The microcontroller interfaces to the ISL26134 Evaluation software ADC through a galvanically-isolated interface and provides - Time domain analysis serial communication through the USB between the board and - Noise histogram analysis the PC. - FFT analysis Software for the PC provides a Graphical User Interface (GUI) that allows the user to perform data capture, and then to Hardware process and plot the results of the time domain analysis, the histogram analysis, and/or the frequency domain analysis on The ISL26134AV28EV1Z evaluation board provides the user a the captured data. The GUI also enables the user to save means of evaluating the ISL26134 Analog-to-Digital Converter conversion data from the ADC to a file, or to save the results of (ADC). The ISL26134 is a high performance 24-bit ADC that the analyzed conversion data. includes a very low noise programmable gain amplifier. The ISL26134 offers gain selections of 1x, 2x, 64x, and 128x. It offers word rates of 10Sps and 80Sps (clock = 4.9152MHz). Ordering Information Gain and word rate selections are made by pin function control PART NUMBER DESCRIPTION through jumper selections. ISL26134AV28EV1Z Evaluation Board The board comes with an ISL26134 soldered in place. This can be removed and an ISL26132 soldered in its place. Related Literature For a full list of related documents, visit our website - ISL26134 product page FIGURE 1. ISL26134 EVALUATION BOARD AN1672 Rev.2.00 Page 1 of 23 Jan 9, 2018ISL26134AV28EV1Z The ADC section of the evaluation board has three banana jack Evaluation Board Overview power connections. One of these is AGND which serves as the The ISL26134AV28EV1Z evaluation board is segmented into two power supply ground connection for the ADC segment of the sections. These sections are galvanically isolated with a board. The DVDD jack supplies the digital side of the ADC (3.3V multi-channel isolation chip. The ISL26134 ADC and its to 5V). The AVDD jack supplies the analog portion of the ADC (5V) associated circuitry (voltage reference and input signal and powers the voltage reference. The voltage reference is a components) are isolated from the microcontroller-USB interface ISL21090BFB825Z-TK 2.5V reference. A header is provided to to the PC. The ADC and its associated circuitry are powered by a also use an external voltage reference for the ADC. laboratory supply. The microcontroller with its USB interface is powered from the USB connection. Galvanic isolation is not The microcontroller provides the USB interface to the PC. A necessary in every application. The purpose of the isolation is to software GUI is available to communicate with the eliminate noise from the USB ground power connection from microcontroller and provides the means to collect and analyze affecting the sensitive measurements made by the ADC when data for the ADC. used in the 64X or 128X gain settings. ISL21090 FIGURE 2. BLOCK DIAGRAM OF THE EVALUATION BOARD FOR THE ISL26134 AN1672 Rev.2.00 Page 2 of 23 Jan 9, 2018