MAX134

3¾位数字DMM电路


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说明

The MAX133 and MAX134 are integrating A/D converters for 3¾ digit multimeters and data acquisition systems such as data loggers and weigh scales. The A/D's internal resolution is ±40,000 counts. An extra digit is supplied as a guard digit to allow autozero or tare of a 4000 count displayed reading to 1/10 of a displayed count. The conversion time is 50ms.

The MAX133 and MAX134 differ only in their microprocessor interface. The MAX133 has a 4 bit multiplexed address/data bus while the MAX134 has 3 separate address lines and a 4 bit bidirectional data bus. Both devices can be used with 4, 8, and 16 bit microprocessors.

When controlled by a microprocessor, the MAX133 and MAX134 can perform auto-ranging measurements from ±400.0mV to ±4000V full scale. External attenuator resistors are required, but range switching is performed by the A/D.

The power supply is typically a 9V battery or ±5V. Operating current is typically 100µA while standby current is only 25µA.
MAX133、MAX134:引脚配置 MAX133、MAX134:引脚配置 放大+

关键特性

  • 40,000 Count Resolution
  • 0.025% Accuracy
  • 20 Conversions per Second
  • Microprocessor Interface
  • 100µA Operating Supply Current
  • Low External Component Count
  • 5µV Resolution
  • Demonstration Kit Available MAX134/DEMO

应用

  • 数据采集系统
  • 数据记录仪
  • 数字面板表
  • 称重仪
Part NumberResolution
(±Counts)
Conv. Rate
(ksps)
Data BusDiff/S.E. InputExternal VREF
(V)
External VREF
(V)
Unipolar VIN
(V)
DNL
(±LSB)
INL
(±LSB)
Package/PinsBudgetary
Price
maxminmaxmaxSee Notes
MAX133 40000.02µP/4Diff. Only0660.216
MQFP/44
PDIP/40
PLCC/44
$14.89 @1k
MAX134 
MQFP/44
PDIP/40
PLCC/44
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Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。


MAX134EVKIT: MAX134评估板

质量和环境数据

申请可靠性报告: MAX134 
无铅封装的锡(Sn)晶须报告

CAD Symbols and Footprints

  • MAX134CMH+D
  • MAX134CMH+TD
  • MAX134CPL+
  • MAX134CQH+D
  • MAX134CQH+TD
  • MAX134EPL+
  • MAX134EQH+D
  • 型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

    备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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    相关资料

    类型 编号 标题
    评估板6752MAX134EVKIT MAX134评估板
    评估板1363MAX134EVSYS 基于PC机平台的MAX134评估系统