Datasheet

EVM Basic Functions
1-3
EVM Overview
1.3 EVM Basic Functions
This EVM is designed primarily as a functional evaluation platform to test
certain functional characteristics of the DAC7654 DAC. Functional evaluation
of the installed DAC device can be accomplished with the use of any
microprocessor, TMS320 DSP family or some sort of a waveform generator.
The headers J2 and P2 are connectors provided to allow the control signals
and data required to interface a host processor or waveform generator with the
DAC7654 EVM using a custom-built cable.
A specific adapter interface card is available for most of TI’s DSP Starter Kit
(DSK), and the card model depends on the type of the TI DSP Starter Kit to
be used. To acquire the correct adapter interface card, be sure to specify the
DSP that is used. This EVM can connect to and interface with an MSP430
based platform (HPA449) that uses the MSP430F449 microprocessor. For
more details or information regarding the adapter interface card or the HPA449
platform, call Texas Instruments. or send email to [e-mail].
The DAC outputs are monitored through the selected pins of the J4 header
connector. The outputs of U1 can be switched from their respective jumpers
W2, W3, W4, and W10 for stacking purposes. Stacking allows a total of eight
DAC channels if two DAC7654 EVMs are stacked.
In addition, the option of selecting one DAC output (from J4−2, 4, 6, and 8 only)
to be connected to the output operational amplifier, U2, is also possible by
using a jumper across the selected pins of J4. The output operational amplifier,
U2, is configurable through J5, W5, and W15 for any desired waveform
characteristic.
A block diagram of the DAC7654 EVM is shown in Figure 1−1.