410-241 DIGILENT | Alldatasheet

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Pullman, WA 99163 509.334.6306 www.digilentinc.com PmodDA3™ Reference Manual Revised April 12, 2016 This manual applies to the PmodDA3 rev. B DOC#: 502-241 Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners. Page 1 of 2 Overview The PmodDA3 is a 16-bit digital-to-analog converter (DAC) with an SMA connector for high resolution and low noise analog output.

1 Functional Description

The PmodDA3 utilizes Analog Devices AD5541A to provide analog output with 16-bit resolution.

2 Interfacing with the Pmod

The PmodDA3 communicates with the host board via a SPI-like protocol. This interface is different than the traditional SPI protocol in the fact that the pin normally designated to the host receiving data (MISO), is now used for a Load DAC (LDAC) function so that the output of the DAC can be updated immediately once the module is loaded with the incoming 16 bits of data. To send data to the Pmod, users must drive the Chip Select (CS) line to a logic level low voltage and then send the 16 clock pulses and 16 bits of data in SPI Mode 0; that is, placing the most significant bit (MSB) of data on the data line right after the Serial Clock line (SCLK) has been brought to a logic level low voltage. When all of the data has been latched into, i.e. prepared for, the internal serial input register, bringing the CS line back to a logic level high voltage will transfer all of the data from the shift register to the serial input register if The PmodDA3.  High resolution, 16-bit Digital-to-Analog converter  Low noise analog output  SMA connector  2.5V reference voltage  Small PCB size for flexible designs 1.2“ × 0.8” (3.0 cm × 2.0 cm)  6-pin Pmod port with GPIO interface  Follows Digilent Pmod Interface Specification Type 1 Features include:

Copyright Digilent, Inc. All rights reserved. shift register to the DAC register.

2 DIN Data Input

4 SCLK Serial Clock

5 GND Power Supply Ground

Table 1. Pinout description table.

3 Physical Dimensions

the pin header and 0.8 inches long on the sides perpendicular to the pin header.