DAC80504 datasheet(36/50 Pages) TI2

36 / 50 page

Microcontroller

SCLK

MOSI

SCLK

SDI

DACx0504

MISO

SDO

DAC80504, DAC70504, DAC60504

SBAS871C – AUGUST 2017 – REVISED JANUARY 2019

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Product Folder Links: DAC80504 DAC70504 DAC60504

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9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

The high linearity, small package size and wide temperature range make the DACx0504 suitable in applications

such as optical networking, wireless infrastructure, industrial automation and data acquisition systems. The

device incorporates a 2.5 V internal reference with an internal reference divider circuit that enables full-scale

DAC output voltages of 1.25 V, 2.5 V, or 5 V.

9.1.1 Interfacing to a Microcontroller

Figure 74 displays a typical serial interface that may be observed when connecting the DACx0504 SPI serial

interface to a (master) microcontroller type platform. The setup for the interface is as follows: the microcontroller

output SPI CLK drives the SCLK pin of the DACx0504, while the DACx0504 SDI pin is driven by the MOSI pin of

the microcontroller. The CS pin of the DACx0504 can be asserted from a general program input/output pin of the

microcontroller. When data are to be transmitted to the DACx0504, the CS pin is taken low. The data from the

microcontroller is then transmitted to the DACx0504, totaling 24 bits latched into the DACx0504 device through

the falling edge of SCLK. CS is then brought high after the completed write. The DACx0504 requires data with

the MSB as the first bit received.

Figure 74. Typical Serial Interface

DAC80504 데이터시트(PDF) 36 Page - Texas Instruments