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低功耗、3 1/2位A/D转换器

产品详情

主要特征

应用/用途

Parametric specs for Display-Oriented ADCs
Resolution (±Counts) 2000
# Input Channels 1
Conv. Rate (ksps) (max) 0.0025
Data Bus 7-Segment
Diff/S.E. Input Diff. Only
Internal VREF (V) (nominal) 3
External VREF (V) (min) -5
External VREF (V) (max) 5
Bipolar VIN (±V) (max) 0.2
Package/Pins MQFP/44
PDIP/40
Budgetary
Price (See Notes)
5.64
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技术文档

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参量

Parametric specs for Display-Oriented ADCs
Resolution (±Counts) 2000
# Input Channels 1
Conv. Rate (ksps) (max) 0.0025
Data Bus 7-Segment
Diff/S.E. Input Diff. Only
Internal VREF (V) (nominal) 3
External VREF (V) (min) -5
External VREF (V) (max) 5
Bipolar VIN (±V) (max) 0.2
Package/Pins MQFP/44
PDIP/40
Budgetary
Price (See Notes)
5.64

主要特征

  • Improved 2nd Source!
  • Guaranteed first reading recovery from overrange
  • Zero Input Gives Zero Reading
  • Drives LED Displays Directly
  • Low Noise (15μV p-p) without hysteresis or overrange hangover
  • True Differential Reference and Input
  • Monolithic, Low Power CMOS Design

应用/用途

  • Conductance
  • Current
  • Material Thickness
  • Pressure
  • Resistance
  • Speed
  • Temperature
  • Voltage

描述

The Maxim ICL7137 is a monolithic analog to digital converter with all the necessary active devices to directly interface with a light emitting diode (LED) display. Excluding the LED display current, the ICL7137 supply current is under 200μA, making it suitable for battery operation.

Versatility and accuracy are inherent features of this converter. The dual-slope conversion technique automatically rejects interference signals common in industrial environments. The true differential input and reference are particularly useful when making ratiometric measurements (ohms or bridge transducers), and the zero integrator phase in Maxim's ICL7137 eliminates overrange hangover and hysteresis effects. Finally, this device offers high accuracy by lowering rollover error to less than one count and zero reading drift to less than 1μV/°C.

简化框图

ICL7137:典型工作电路 ICL7137:典型工作电路 Zoom icon

技术文档

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