DAC8802屬于集成電路（IC）的數(shù)模轉(zhuǎn)換器（DAC）。由美國(guó)德州儀器公司制造生產(chǎn)的DAC8802數(shù)模轉(zhuǎn)換器（DAC）數(shù)模轉(zhuǎn)換器（DAC、D/A、D2A 或 D 轉(zhuǎn) A）可將數(shù)字信號(hào)轉(zhuǎn)換為緩沖或無(wú)緩沖的模擬電壓或電流。DAC 架構(gòu)是否適合特定應(yīng)用，要取決于分辨率和采樣頻率。DAC 通常用于音樂(lè)播放器，將數(shù)字?jǐn)?shù)據(jù)流轉(zhuǎn)換為模擬音頻流。它們還用于電視和手機(jī)，將數(shù)字視頻數(shù)據(jù)轉(zhuǎn)換為模擬視頻信號(hào)，再連接到屏幕驅(qū)動(dòng)器，以顯示單色或彩色圖像。

FEATURES

Relative Accuracy: 1 LSB Max

Differential Nonlinearity: 1 LSB Max

2-mA Full-Scale Current ±20%,

with VREF = ±10 V

0.5 ms Settling Time

Midscale or Zero-Scale Reset

Separate 4Q Multiplying Reference Inputs

Reference Bandwidth: 10 MHz

Reference Dynamics: –105 dB THD

SPI?-Compatible 3-Wire Interface:

50 MHz

Double Buffered Registers to Enable

Simultaneous Multichannel Update

Internal Power-On Reset

Industry-Standard Pin Configuration

APPLICATIONS

Automatic Test Equipment

Instrumentation

Digitally Controlled Calibration

DESCRIPTION

The DAC8802 is a dual, 14-bit, current-output

digital-to-analog converter (DAC) designed to

operate from a single 2.7 V to 5.5 V supply.

The applied external reference input voltage VREF

determines the full-scale output current. An internal

feedback resistor (RFB) provides temperature

tracking for the full-scale output when combined with

an external I-to-V precision amplifier.

A doubled-buffered, serial data interface offers

high-speed, 3-wire, SPI and microcontroller

compatible inputs using serial data in (SDI), clock

(CLK), and a chip-select (CS). A common

level-sensitive load DAC strobe (LDAC) input allows

simultaneous update of all DAC outputs from

previously loaded input registers. Additionally, an

internal power-on reset forces the output voltage to

zero at system turn-on. An MSB pin allows system

reset assertion (RS) to force all registers to zero

code when MSB = 0, or to half-scale code when

MSB = 1.

The DAC8802 is available in an TSSOP-16 package.