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DAC8718EVM用户指南
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This user‘s guide describes the characteristics， operation， and use of the DAC8718EVM， an evaluation board for the DAC8718. The DAC8718 is a low-power， octal， 16-bit digital-to-analog converter （DAC）。 This device features low-power operation， good linearity， and low glitch. This evaluation module （EVM） allows evaluation of all aspects of the DAC8718 and gives control over every pin on the device. Complete circuit descriptions， schematic diagrams， and bills of material are included in this document.
Features
DAC8718EVM： • Full-featured evaluation board for the DAC8718， a 16-bit， serial input， octal output digital-to-analog converter • Onboard or external reference selection • Configurable for single- or dual-supply operation • Wide selection of digital and I/O voltages • Hardware or software control of control logic 1.2
Introduction
The DAC8718 is a 16-bit， low-power， octal DAC that operates from independent AVDD， AVSS， and DVDD supplies. It uses a high-speed serial peripheral interface， or SPI™ （up to 50MHz）， to communicate with a DSP or a microprocessor using a compatible serial interface. The DAC control logic can be controlled using onboard jumpers， or digitally through the J2 header. The DAC8718EVM is designed for unipolar and bipolar （default） modes of operation. This flexibility allows for a wide range of supply voltages. Unipolar operation requires only a single analog voltage supply and bipolar operation requires two analog supplies. The DAC8718EVM 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-64 pin package. Note that the DAC8718EVM has no microprocessor and cannot run software. To connect it to a computer， some type of interface is required.
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