EVM Overview
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Contents
1
EVM Overview
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2
2
Analog Interface
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3
3
Digital Interface
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3
4
Power Supplies
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5
5
Reference Voltage
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5
6
EVM Operation
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6
7
Schematics and Layout
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8
List of Figures
1
Reference Test Points
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6
2
DAC7716EVM Default Jumper Locations
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7
3
Default Settings for Switch S1 (LDAC Low)
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8
4
Default Settings for Switch S2 and S3
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8
List of Tables
1
J1: Analog Interface Pinout
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3
2
J2: Serial Interface Pins
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4
3
J3 Configuration: Power-Supply Input
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5
4
DAC7716EVM Bill of Materials
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9
1
EVM Overview
1.1
Features
DAC7716EVM:
•
Contains all support circuitry needed for the DAC7716
•
Voltage reference options: Either 5V or 2.5V onboard, or external
•
Jumpers on output pins for gain adjustment
•
Compatible with the TI Modular EVM System
This manual covers the operation of the DAC7716EVM. Throughout this document, the abbreviation EVM
and the term evaluation module are synonymous with the DAC7716EVM.
1.2
Introduction
The DAC7716 uses a high-speed SPI interface (up to 50MHz) to communicate with a DSP or a
microprocessor using a compatible serial interface. The DAC features four individual outputs whose gain
is controlled by the addition of a feedback resistor. An additional V
MON
pin can relay any of the four output
channels from the DAC or the signal from the A
IN
pin.
The DAC7716EVM is designed to run in either bipolar (default mode) or unipolar modes of operation. This
flexible design allows for a wide range of supply voltages. The operating mode can be controlled using an
onboard switch or digitally, through the digital header.
The DAC7716EVM is an evaluation module built to the TI Modular EVM System specification. It can be
connected to any modular EVM system interface card. The EVM ships in the TQFP-48 pin package
option.
Note that the DAC7716EVM has no microprocessor and cannot run software. To connect it to a computer,
some type of interface is required.
The device shown in
the front-page figure
is the DAC8734, the 16-bit version of the DAC7716. The
DAC7716 is installed in place of the DAC8734 on the DAC7716 evaluation module.
2
DAC7716EVM
SBAU159 – October 2009
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