Digilent PmodDA3 Digital To Digilent PmodDA3 Digital To Analog Module Converter Board Analog Module Converter Board www.digilentinc.com Reference Manual Reference Manual 215 E Main Suite D Pullman, WA 99163 (509) 334 6306 Voice and Fax Revision: December 5, 2012 Overview The Digilent PmodDA3 Digital to Analog Module Converter changes signals from digital values to analog voltages on a single channel with sixteen bits of resolution. The PmodDA3 uses a standard 6-pin header to interface with your Digilent system board. Features include: one Analog Devices AD5541A 16-bit digital-to-analog converter 6-pin header allow the PmodDA3 to plug directly into the 2.5V reference voltage system board or to connect via a Digilent six- very low noise wire cable SMA connector for analog out See Table 1 for a description of the signals on Functional Description the interface connectors J1 and J3. For additional design information, please refer to The PmodDA3 can produce an analog output the PmodDA3 schematic available on the ranging from 0V to 2.5V. It has two Digilent web site at www.digilentinc.com. simultaneous D/A conversion channels, each with a 12-bit converter that can process The PmodDA3 is usually powered through the separate digital signals. connection with your Digilent system board. The ground and power connections are on pins The PmodDA3 comes equipped with an five and six of the digital interface connector Analog Devices AD5541A digital-to-analog J1. You can also power the PmodDA3 from an converter. This converter sends commands via external power supply provided through pins the SPI/MICROWIRE serial bus to the D/A one and two on the J3 connector. If you use an converter to produce outputs. The controller external power supply, leave JP1 unloaded. can operate with clock rates up to 50MHz. A Damage may result if you load this jumper two byte write to the device will store the value when supplying power from an external written into the serial input register. The LDAC source. pin controls when the output synchronizes with the stored value in the serial input register. Digilent conventionally recommends providing When the LDAC pin is brought low, the output 3.3V to power your Pmod modules. However, synchronizes simultaneously. you can operate the PmodDA3 at any power supply voltage between 2.7V and 5.5V. We designed the PmodDA3 to work with either Operators should exercise caution if using any Digilent programmable logic system boards or voltage greater than 3.3V to avoid damage to embedded control system boards. Most their Digilent system board. Refer to the Digilent system boards, such as the Nexys, reference manuals and schematics for your Basys, or Cerebot, have 6-pin connectors that Doc: 502-241 page 1 of 2 Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners. PmodDA3 Reference Manual Digilent Confidential Digilent, Inc. system board for more information. These reference documents are available on the Digilent website. For more information on the digital-to-analog converter, consult the Analog Devices AD5541A datasheet available at: www.analog.com. Digital Signal Interface J1 1 CS 2 DIN 3 LDAC 4 SCLK 5 GND 6 DVDD Digital Interface J3 1 GND 2 AVDD Table 1: Interface Connector Signal Descriptions www.digilentinc.com Copyright Digilent, Inc. Page 2