描述 Description

The MAX5270 contains eight 13-bit, voltage-output digital-to-analog converters (DACs). On-chip precision output amplifiers provide the voltage outputs. The device operates from +12V/-12V supplies. Its output voltage swing ranges from 0V to +8.192V and is achieved with no external components. The MAX5270 has three pairs of differential reference inputs; two of these pairs are connected to two DACs each, and a third pair is connected to four DACs. The references are independently controlled, providing different full-scale output voltages to the respective DACs. The MAX5270 operates within the following voltage ranges: VDD = +11.4V to +12.6V, VSS = -11.4V to -12.6V, and VCC = +4.75V to +5.25V.
The MAX5270 features double-buffered interface logic with a 13-bit parallel data bus. Each DAC has an input latch and a DAC latch. Data in the DAC latch sets the output voltage. The eight input latches are addressed with three address lines. Data is loaded to the input latch with a single write instruction. An asynchronous load input (active-low LD) transfers data from the input latch to the DAC latch. The active-low LD input controls all DACs; therefore, all DACs can be updated simultaneously by asserting the LD-bar pin. An asynchronous active-low CLR input sets the output of all eight DACs to the respective DUTGND input of the op amp. Note that active-low CLR is a CMOS input, which is powered by VDD. All other logic inputs are TTL/CMOS compatible. The \"A\" grade of the MAX5270 has a maximum INL of ±2LSBs, while the \"B\" grade has a maximum INL of ±4LSBs. Both grades are available in 44-pin MQFP packages.

特性 Features

? Full 13-Bit Performance Without Adjustments
? 8 DACs in a Single Package
? Buffered Voltage Outputs
? Voltage Swing Between 0V and 8.192V
? 22μs Output Settling Time
? Drives up to 10,000pF Capacitive Load
? Low Output Glitch: 30mV
? Low Power Consumption: 10mA (typ)
? Small Package: 44-Pin MQFP
? Double-Buffered Digital Inputs
? Asynchronous Load Updates All DACs Simultaneously
? Asynchronous CLR-bar Forces All DACs to DUTGND Potential

應(yīng)用 Application

? 任意函數(shù)發(fā)生器
? 自動(dòng)測(cè)試設(shè)備(ATE)
? 航空電子與軍用系統(tǒng)
? 數(shù)字增益與失調(diào)控制
? 工業(yè)過程控制
? 元件數(shù)最少的模擬系統(tǒng)
? SONET應(yīng)用

簡(jiǎn)介

MAX5270屬于集成電路（IC）的數(shù)模轉(zhuǎn)換器（DAC）。由制造生產(chǎn)的MAX5270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。