回到顶部

3¾位数字DMM电路

产品详情

主要特征

应用/用途

Parametric specs for Display-Oriented ADCs
Resolution (±Counts) 4000
# Input Channels 1
Conv. Rate (ksps) (max) 0.02
Data Bus µP/4
Diff/S.E. Input Diff. Only
External VREF (V) (min) 0
External VREF (V) (max) 6
Unipolar VIN (V) (max) 6
DNL (±LSB) 0.2
INL (±LSB) 16
Package/Pins MQFP/44
PDIP/40
PLCC/44
Budgetary
Price (See Notes)
15.64
查看更多

简化框图

技术文档

数据资料 3¾位数字DMM电路 Jun 01, 1988

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

参量

Parametric specs for Display-Oriented ADCs
Resolution (±Counts) 4000
# Input Channels 1
Conv. Rate (ksps) (max) 0.02
Data Bus µP/4
Diff/S.E. Input Diff. Only
External VREF (V) (min) 0
External VREF (V) (max) 6
Unipolar VIN (V) (max) 6
DNL (±LSB) 0.2
INL (±LSB) 16
Package/Pins MQFP/44
PDIP/40
PLCC/44
Budgetary
Price (See Notes)
15.64

主要特征

  • 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/用途

  • 数据采集系统
  • 数据记录仪
  • 数字面板表
  • 称重仪

描述

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.

简化框图

MAX133、MAX134:引脚配置 MAX133、MAX134:引脚配置 Zoom icon

技术文档

数据资料 3¾位数字DMM电路 Jun 01, 1988

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