PmodDA4 Digital To Analog PmodDA4 Digital To Analog Converter Reference Manual Converter Reference Manual 1300 Henley Court Pullman, WA 99163 Revision: October 04, 2012 (509) 334 6306 Voice and Fax Overview Engineered around the Analog Devices AD5628 Digital to Analog Converter, the Digilent PmodDA4 provides 8 channels of D/A conversion at 12 bits of resolution. The PmodDA4 can be used with Digilent system boards as well as a growing number of third- party boards equipped with Digilent Pmod connectors. Features include: Analog Devices AD5628 low power, octal, 12-bit, buffered voltage-output DAC High-speed DSP compatible Digital Low power consumption Interface J1 Power-down function capability 1 SYNC 6-pin Pmod connector with 3-wire 2 DIN Serial interface 3 Not Connected (NC) 12-pin output connector 4 SCLK 5 GND Functional Description 6 VCC The PmodDA4 can produce an analog output Analog ranging from 0V to 2.5V when operated with a Interface J2 3.3V power supply. It has eight D/A conversion 1 VOUTA channels, each with a 12-bit converter that can 2 VOUTB process separate digital signals. 3 VOUTC 4 VOUTD To produce outputs, simply send commands to the eight D/A converters via the SPI serial bus. 5 VOUTE (Note: Always send this SPI data to the device 6 VOUTF as a 32-bit word.) You can send D/A converter 7 VOUTG settings to individual D/A converters or all eight 8 VOUTH D/A converters at once. 9, 10 GND 11, 12 VCC For a description of the signals on the interface connectors J1 and J2, see Table 1. For more Table 1. Interface Connector Signal detailed information, users should refer to the Descriptions PmodDA4 schematic available on the Digilent web site. Doc: 502-245 page 1 of 2 Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners. PmodDA4 Reference Manual Power Supply In most cases, the PmodDA4 is powered by the system board to which it is connected. The power and ground connections are on pins five and six of the Pmod connector J1. Alternatively, you can power the PmodDA4 from an external power supply connected to pins 9-12 of the analog interface connector J2. Note: If you supply power from an external source, you must remove the power select jumper on the system board to disconnect the power from the system board to J1. Damage may result if two power supplies are connected at the same time. In general, Digilent engineers suggest providing 3.3V to power Pmods. You can operate the PmodDA4 at any power supply voltage between 2.7V and 5.5V. However, be sure to exercise caution when using any voltage greater than 3.3V. Using a voltage higher than 3.3V could result in damage to your host board. For detailed information about the AD5628, including Input Register data formatting, please refer to the AD5628 Data Sheet available at