MAX1271A, MAX1271B: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
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
语言下载文件备注
英文MAX1270-MAX1271B.pdfRev 2; 03/2005
关键参数
Part NumberResolution
(bits)
Input Chan.Conv. Rate
(ksps)
ADC ArchitectureData BusDiff/S.E. InputInternal VREF
(V)
External VREF
(V)
External VREF
(V)
Unipolar VIN
(V)
Bipolar VIN
(±V)
SNR
(dB)
THD
(dB)
INL
(±LSB)
Package/PinsBudgetary
Price
ADCmaxnominalminmaxmaxmaxSee Notes
MAX1270128110SARSPIS.E. Only4.0962.44.18101070-871
  • PDIP(N)/24
  • SSOP/28
$12.55 @1k
MAX12714.0962.048
  • PDIP(N)/24
  • SSOP/28
$11.57 @1k
开发工具
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订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1271ACAI停止供货MAX1271ACAI+SSOP;28引脚0°C至+70°C参考数据资料
MAX1271ACAI+生产中SSOP,;28引脚;81.6mm²0°C至+70°CRoHS/无铅:无铅
MAX1271ACAI+T生产中SSOP;28引脚0°C至+70°C参考数据资料
MAX1271ACAI-T停止供货MAX1271ACAI+TSSOP;28引脚0°C至+70°C参考数据资料
MAX1271ACNG停止供货MAX1271ACNG+PDIP(N),;24引脚;265.4mm²0°C至+70°CRoHS/无铅:否
MAX1271ACNG+生产中PDIP(N),;24引脚;265.4mm²0°C至+70°CRoHS/无铅:无铅
MAX1271AEAI停止供货MAX1271AEAI+SSOP;28引脚-40°C至+85°C参考数据资料
MAX1271AEAI+生产中SSOP,;28引脚;81.6mm²-40°C至+85°CRoHS/无铅:无铅
MAX1271AEAI+T生产中SSOP;28引脚-40°C至+85°C参考数据资料
MAX1271AEAI-T停止供货MAX1271AEAI+TSSOP;28引脚-40°C至+85°C参考数据资料
型号状况推荐替代产品封装:类型 引脚 占位面积封装图 编码/变更 *温度RoHS/无铅?
MAX1271AENG停止供货MAX1271AENG+PDIP(N),;24引脚;265.4mm²-40°C至+85°CRoHS/无铅:否
MAX1271AENG+生产中PDIP(N),;24引脚;265.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1270-MAX1271B.pdf MAX1271B
MAX1270-MAX1271B.pdf MAX1271B