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MAX1270A, MAX1270B：多量程、+5V、8通道、串行12位ADC

12位、8通道串行ADC，输入端具有±17V故障保护

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.

关键特性 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

MAX1270、MAX1270A、MAX1270B、MAX1271、MAX1271A、MAX1271B：典型工作电路 应用 自动测试 电池供电仪表 数据采集系统 工业控制系统 医疗仪器 机器人技术

数据手册DataSheet

关键参数

开发工具

• MAX1270EVC16
• MAX1270EVKIT
• MAX1270EVSYS

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