MAX133:3¾位数字DMM电路

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.

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
MAX133、MAX134:引脚配置
MAX133、MAX134:引脚配置
应用
  • 数据采集系统
  • 数据记录仪
  • 数字面板表
  • 称重仪
数据手册DataSheet
语言下载文件备注
英文MAX133-MAX134.pdfRev 0; 06/1988
关键参数
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
MAX13340000.02µP/4Diff. Only0660.216
  • MQFP/44
  • PDIP(W)/40
  • PLCC/44
$14.89 @1k
MAX134
  • MQFP/44
  • PDIP(W)/40
  • PLCC/44
开发工具
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX133C/D停止供货DICE;0°C至+70°C参考数据资料
MAX133CMH+D生产中MQFP,;44引脚;181.2mm²0°C至+70°CRoHS/无铅:无铅
MAX133CMH+TD生产中MQFP,;44引脚;181.2mm²0°C至+70°CRoHS/无铅:无铅
MAX133CMH-D停止供货MAX133CMH+DMQFP;0°C至+70°C参考数据资料
MAX133CMH-TD停止供货MAX133CMH+TDMQFP;0°C至+70°C参考数据资料
MAX133CPL停止供货MAX133CPL+PDIP(W),;40引脚;836.5mm²0°C至+70°CRoHS/无铅:否
MAX133CPL+生产中PDIP(W),;40引脚;836.5mm²0°C至+70°CRoHS/无铅:无铅
MAX133CQH+D生产中PLCC,;44引脚;311.5mm²0°C至+70°CRoHS/无铅:无铅
MAX133CQH+TD生产中PLCC,;44引脚;311.5mm²0°C至+70°CRoHS/无铅:无铅
MAX133CQH-D停止供货MAX133CQH+DPLCC,;44引脚;311.5mm²0°C至+70°CRoHS/无铅:否
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?
MAX133CQH-TD停止供货MAX133CQH+TDPLCC;44引脚0°C至+70°C参考数据资料
MAX133EPL停止供货MAX133EPL+PDIP(W),;40引脚;836.5mm²-40°C至+85°CRoHS/无铅:否
MAX133EPL+生产中PDIP(W),;40引脚;836.5mm²-40°C至+85°CRoHS/无铅:无铅
MAX133EQH+D生产中PLCC,;44引脚;311.5mm²-40°C至+85°CRoHS/无铅:无铅
MAX133EQH+TD生产中PLCC;44引脚-40°C至+85°C参考数据资料
MAX133EQH-D停止供货MAX133EQH+DPLCC,;44引脚;311.5mm²-40°C至+85°CRoHS/无铅:否
MAX133EQH-TD停止供货MAX133EQH+TDPLCC;44引脚-40°C至+85°C参考数据资料
MAX133-MAX134.pdf MAX134
MAX133-MAX134.pdf MAX134