MAX127B:多量程、+5V、12位DAS,带有2线串行接口

首款2线、12位、8通道、串行ADC,具有±17V故障保护输入

The MAX127/MAX128 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 MAX127; and ±VREF, ±VREF/2, 0 to +VREF, 0 to +VREF/2 for the MAX128. 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, an 8ksps throughput rate, and the option of an internal 4.096V or external reference. The MAX127/MAX128 feature a 2-wire, I2C-compatible serial interface that allows communication among multiple devices using SDA and SCL lines. A hardware shutdown input (SHDN) and two software-programmable power-down modes (standby and full power-down) are provided for low-current shutdown between conversions. In standby mode, the reference buffer remains active, eliminating startup delays. The MAX127/MAX128 are available in 24-pin narrow PDIP or space-saving 28-pin SSOP packages.

关键特性
  • 12-Bit Resolution, 1/2 LSB Linearity
  • +5V Single-Supply Operation
  • I2C-Compatible, 2-Wire Serial Interface
  • Four Software-Selectable Input Ranges
    • MAX127: 0 to +10V, 0 to +5V, ±10V, ±5V
    • MAX128: 0 to +VREF, 0 to +VREF/2, ±VREF, ±VREF/2
  • 8 Analog Input Channels
  • 8ksps Sampling Rate
  • ±16.5V Overvoltage-Tolerant Input Multiplexer
  • Internal 4.096V or External Reference
  • Two Power-Down Modes
  • 24-Pin Narrow PDIP or 28-Pin SSOP Packages
功能框图
MAX127、MAX127A、MAX127B、MAX128、MAX128A、MAX128B:典型工作电路
产品应用
  • 电池供电应用
  • 数据采集
  • 工业控制系统
  • 机器人技术
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
MAX1271288SARI2CS.E. Only4.0962.44.18101070-871
PDIP(N)/24
SSOP/28
$13.94 @1k
MAX1284.0962.048-
PDIP(N)/24
SSOP/28
$11.57 @1k
数据手册DataSheet
英文MAX127-MAX128B.pdfRev 1; 01/2015
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX127BCAI生产中SSOP,;28引脚;81.6mm²0°C至+70°CRoHS/无铅:否
MAX127BCAI+生产中SSOP,;28引脚;81.6mm²0°C至+70°CRoHS/无铅:无铅
MAX127BCAI+T生产中SSOP,;28引脚;81.6mm²0°C至+70°CRoHS/无铅:无铅
MAX127BCAI-T停止供货MAX127BCAI+TSSOP,;28引脚;81.6mm²0°C至+70°CRoHS/无铅:否
MAX127BCNG停止供货MAX127BCNG+PDIP(N),;24引脚;265.4mm²0°C至+70°CRoHS/无铅:否
MAX127BCNG+生产中PDIP(N),;24引脚;265.4mm²0°C至+70°CRoHS/无铅:无铅
MAX127BEAI生产中SSOP,;28引脚;81.6mm²-40°C至+85°CRoHS/无铅:否
MAX127BEAI+生产中SSOP,;28引脚;81.6mm²-40°C至+85°CRoHS/无铅:无铅
MAX127BEAI+T生产中SSOP,;28引脚;81.6mm²-40°C至+85°CRoHS/无铅:无铅
MAX127BEAI-T停止供货MAX127BEAI+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?
MAX127BENG停止供货MAX127BENG+PDIP(N),;24引脚;265.4mm²-40°C至+85°CRoHS/无铅:否
MAX127BENG+生产中PDIP(N),;24引脚;265.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX127-MAX128B.pdf MAX127B
MAX127-MAX128B.pdf MAX127B
MAX127-MAX128B.pdf MAX127B
MAX127-MAX128B.pdf MAX127B
MAX127-MAX128B.pdf MAX127B
MAX127-MAX128B.pdf MAX127B
MAX127-MAX128B.pdf MAX127B