DAC8812IBPWR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DAC8812IBPWR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。

1 Features

1? Relative Accuracy: 1 LSB Max

? Differential Nonlinearity: 1 LSB Max

? 2-mA Full-Scale Current ±20%,

With VREF = ±10 V

? 0.5-μs 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

2 Applications

? Automatic Test Equipment

? Instrumentation

? Digitally Controlled Calibration

3 Description

The DAC8812 is a dual, 16-bit, current-output digitalto-

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 double-buffered, serial data interface offers highspeed,

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 turnon. An MSB pin

allows system reset assertion (RS) to force all

registers to zero code when MSB = 0, or to midscale

code when MSB = 1.