描述 Description

The MAX1270/MAX1271 are multirange, 12-bit data-acquisition systems (DAS) that require only a single +5V supply for operation, yet accept signals at their analog inputs that may span above the power-supply rail and below ground. These systems provide eight analog input channels that are independently software programmable for a variety of ranges: ±10V, ±5V, 0 to +10V, 0 to +5V for the MAX1270; ±VREF, ±VREF/2, 0 to VREF, 0 to VREF/2 for the MAX1271. This range switching increases the effective dynamic range to 14 bits and provides the flexibility to interface 4-20mA, ±12V, and ±15V powered sensors directly to a single +5V system. In addition, these converters are fault protected to ±16.5V; a fault condition on any channel will not affect the conversion result of the selected channel. Other features include a 5MHz bandwidth track/hold, software-selectable internal/external clock, 110ksps throughput rate, and internal 4.096V or external reference operation.
The MAX1270/MAX1271 serial interface directly connects to SPI?/QSPI? and MICROWIRE? devices without external logic.
A hardware shutdown input (SHDN-bar) and two software-programmable power-down modes, standby (STBYPD) or full power-down (FULLPD), are provided for low-current shutdown between conversions. In standby mode, the reference buffer remains active, eliminating start-up delays.
The MAX1270/MAX1271 are available in 24-pin narrow DIP or space-saving 28-pin SSOP packages.

特性 Features

? 12-Bit Resolution, 1/2LSB Linearity
? +5V Single-Supply Operation
? SPI/QSPI and MICROWIRE-Compatible 3-Wire Interface
? Four Software-Selectable Input Ranges
? MAX1270: 0 to +10V, 0 to +5V, ±10V, ±5V
? MAX1271: 0 to VREF, 0 to VREF/2, ±VREF, ±VREF/2
? Eight Analog Input Channels
? 110ksps Sampling Rate
? ±16.5V Overvoltage-Tolerant Input Multiplexer
? Internal 4.096V or External Reference
? Two Power-Down Modes
? Internal or External Clock
? 24-Pin Narrow DIP or 28-Pin SSOP Packages

應(yīng)用 Application

? 自動(dòng)測(cè)試
? 電池供電儀表
? 數(shù)據(jù)采集系統(tǒng)
? 工業(yè)控制系統(tǒng)
? 醫(yī)療儀器
? 機(jī)器人技術(shù)

簡(jiǎn)介

MAX1271B屬于集成電路（IC）的ADC/DAC-特殊用途。由制造生產(chǎn)的MAX1271BADC/DAC - 特殊用途該產(chǎn)品族中的產(chǎn)品可用于模擬和數(shù)字表示的信息轉(zhuǎn)換，適用于特定用例，或集成了通用數(shù)據(jù)轉(zhuǎn)換器中不常見(jiàn)的其他功能。例如針對(duì)超聲或汽車?yán)走_(dá)應(yīng)用集成了低噪聲放大器和可變?cè)鲆婕?jí)的器件、注重音頻和視頻的產(chǎn)品、在段碼式顯示器上集成顯示測(cè)量值功能的器件、集成輸入輸出電氣隔離的器件等。