Datasheet

1300 Henley Court

Pullman, WA 99163

509.334.6306

www.digilentinc.com

PmodDA4™ Reference Manual

Revised May 24, 2016

This manual applies to the PmodDA4 rev. B

DOC#: 502-245

Other product and company names mentioned may be trademarks of their respective owners.

Page 1 of 3

Overview

The Digilent PmodDA4 is an octal, 12-bit digital-to-analog converter module.

1 Functional Description

The PmodDA4 utilizes Analog Devices AD5628 to provide a signal DAC capable of 8 simultaneous output channels.

With its internal reference voltage of 2.5V, a resolution of approximately 1 mV can be achieved.

2 Interfacing with the Pmod

The PmodDA4 communicates with the host board via the SPI protocol. By driving the Chip Select (CS) line to a logic

level low voltage, users may send a series of 32 bits of information with the data clocked into the appropriate

command that was sent in the data stream is executed.

An example data stream of how the 32 bits are to be sent to the module is provided below from the AD5628

datasheet.

The PmodDA4.

 Eight channel, 12-bit DAC

 Capable of eight simultaneous outputs

 High-speed DSP compatible

 Power-down function capability

 Low power consumption

 Small PCB size for flexible designs 1.2“ × 0.8” (3.0 cm × 2.0

cm)

 6-pin Pmod connector with SPI interface

 Follows Digilent Interface Specification Type 2

 Example code available in resource center

Features include:

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300 Henley Court Pullman, WA 99163 509.334.6306 www.digilentinc.com PmodDA4™ Reference Manual Revised May 24, 2016 This manual applies to the PmodDA4 rev. B Overview The Digilent PmodDA4 is an octal, 12-bit digital-to-analog converter module. Features include:          Eight channel, 12-bit DAC Capable of eight simultaneous outputs High-speed DSP compatible Power-down function capability Low power consumption Small PCB size for flexible designs 1.2“ × 0.8” (3.0 cm × 2.
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PmodDA4™ Reference Manual DB31 (MSB) X X Command Bits X X C3 C2 C1 Address Bits C0 A3 A2 A1 A0 Data Bits D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 DB0 (LSB) X X X X X X X X Table 1. Example data stream from the AD5628 datasheet. Users should note that the PmodDA4 by default attempts to use an external reference voltage.
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PmodDA4™ Reference Manual 3 Physical Dimensions The pins on the pin header are spaced 100 mil apart. The PCB is 1.2 inches long on the sides parallel to the pins on the pin header and 0.8 inches long on the sides perpendicular to the pin header. Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.