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低功耗、12位采样ADC,内置电压基准及关断模式

对于新设计,请参考MAX129X系列产品

产品详情

主要特征

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 12
# Input Channels 1
Conv. Rate (ksps) (max) 100
Data Bus µP/8
SPI
ADC Architecture SAR
Diff/S.E. Input Diff. Only
Internal VREF (V) (nominal) 4.096
External VREF (V) (min) 2.5
External VREF (V) (max) 5
Unipolar VIN (V) (max) 4.096
INL (±LSB) 1
Package/Pins PDIP/24
SOIC (W)/24
Budgetary
Price (See Notes)
13.95
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参量

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 12
# Input Channels 1
Conv. Rate (ksps) (max) 100
Data Bus µP/8
SPI
ADC Architecture SAR
Diff/S.E. Input Diff. Only
Internal VREF (V) (nominal) 4.096
External VREF (V) (min) 2.5
External VREF (V) (max) 5
Unipolar VIN (V) (max) 4.096
INL (±LSB) 1
Package/Pins PDIP/24
SOIC (W)/24
Budgetary
Price (See Notes)
13.95

主要特征

  • 12-Bit Resolution, 1/2 LSB Linearity
  • +5V or ±5V Operation
  • Built-In Track/Hold
  • Internal Reference with Adjustment Capability
  • Low Power:
    • 3mA Operating Mode
    • 20µA Power-Down Mode
  • 100ksps Tested Sampling Rate
  • Serial and 8-Bit Parallel µP Interface
  • 24-Pin Narrow DIP and Wide SO Packages

应用/用途

  • 自动测试设备(ATE)
  • 电池供电数据记录
  • 数据采集
  • 数字信号处理(DSP)
  • 机电系统
  • 高精度过程控制
  • PC笔输入量化器
  • 电信

描述

The MAX191 is a monolithic, CMOS, 12-bit analog-to-digital converter (ADC) featuring differential inputs, track/hold (T/H), internal voltage reference, internal or external clock, and parallel or serial µP interface. The MAX191 has a 7.5µs conversion time, a 2µs acquisition time, and a guaranteed 100ksps sample rate.

The MAX191 operates from a single +5V supply or from dual ±5V supplies, allowing ground-referenced bipolar input signals. The device features a logic power-down input, which reduces the 3mA VDD supply current to 50µA max, including the internal-reference current.

Decoupling capacitors are the only external components needed for the power supply and reference. This ADC operates with either an external reference, or an internal reference that features an adjustment input for trimming system gain errors.

The MAX191 provides three interface modes: two 8-bit parallel modes, and a serial interface mode that is compatible with SPI™, QSPI™, and MICROWIRE™ serial-interface standards.

简化框图

MAX191:功能框图 MAX191:功能框图 Zoom icon

Technical Docs

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