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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

产品详情

主要特征

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 12
# Input Channels 8
Conv. Rate (ksps) (max) 110
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input S.E. Only
Internal VREF (V) (nominal) 4.096
External VREF (V) (min) 2.4
External VREF (V) (max) 4.18
Unipolar VIN (V) (max) 4.096
Bipolar VIN (±V) (max) 2.048
INL (±LSB) 1
Package/Pins PDIP/24
SSOP/28
Budgetary
Price (See Notes)
12.88
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简化框图

Technical Docs

数据资料 多量程、+5V、8通道、串行12位ADC Mar 02, 2005

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参量

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 12
# Input Channels 8
Conv. Rate (ksps) (max) 110
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input S.E. Only
Internal VREF (V) (nominal) 4.096
External VREF (V) (min) 2.4
External VREF (V) (max) 4.18
Unipolar VIN (V) (max) 4.096
Bipolar VIN (±V) (max) 2.048
INL (±LSB) 1
Package/Pins PDIP/24
SSOP/28
Budgetary
Price (See Notes)
12.88

主要特征

  • 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

应用/用途

  • 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

描述

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.

简化框图

MAX1270、MAX1270A、MAX1270B、MAX1271、MAX1271A、MAX1271B:典型工作电路 MAX1270、MAX1270A、MAX1270B、MAX1271、MAX1271A、MAX1271B:典型工作电路 Zoom icon

Technical Docs

数据资料 多量程、+5V、8通道、串行12位ADC Mar 02, 2005

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心