Datasheet

6 Using the EVM
6.1 As a Reference Board
6.2 As a Prototype Board
6.3 As a Software Test Platform
www.ti.com Using the EVM
The ADS788xEVM serves three functions:
1. As a reference design
2. As a prototype board; and
3. As software test platform
As a reference design, the ADS788xEVM contains the essential circuitry to showcase the ADC. This
essential circuitry includes the input amplifier, reference circuit, and buffers. The analog input circuit is
optimized for a 100-kHz input signal; therefore, users may need to adjust the resistor and capacitor values
to accommodate higher frequencies and different test systems. In ac-type applications where signal
distortion is concern, care should be taken to ensure that polypropylene or C0G-type capacitors are used
in the signal path.
The design and layout of this EVM, in conjunction with the individual ADC data sheet, can be used as a
guide when incorporating this ADC into a user system board.
As a prototype board, the buffer circuit consists of resistor pads for configuring the input as either inverting
or noninverting. The input circuit can be modified to accommodate user prototype needs, such as
evaluating another amplifier or limiting noise for best performance. The analog, power, and digital
connectors can be made to plug into a standard 0.1-inch breadboard or ribbon cables to interface directly
to FPGAs or processors.
As a software test platform, connectors P1 and P2 plug into the serial interface connectors of the 5-6K
interface card. The 5-6K interface card plugs into the TMS320C5000™ DSP and TMS320C6000™ DSP
starter kits (DSK). See the 5-6K interface card user’s guide (SLAU104 ) for more information.
SLAU166B – October 2005 – Revised August 2008 ADS788xEVM 11
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