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TI产品 - ADS1226介绍

ADS1226 - 具有两路差动输入多路复用器和内部振荡器的 24 位 ADC

ADS1226是TI德州仪器公司的一款精密ADC(<=10MSPS)产品，ADS1226是具有两路差动输入多路复用器和内部振荡器的 24 位 ADC，本站介绍了ADS1226的封装应用图解、特点和优点、功能等，并给出了与ADS1226相关的TI元器件型号供参考。

ADS1226 - 具有两路差动输入多路复用器和内部振荡器的 24 位 ADC - 精密ADC(<=10MSPS) - 模数转换器 - 德州仪器

产品描述

The ADS1225 and ADS1226 are 24-bit delta-sigma analog-to-digital (A/D) converters. They offer excellent performance, ease-of-use, and low power in a small 4mm × 4mm QFN package and are well-suited for demanding high-resolution measurements, especially in portable and other space-saving and power-constrained applications.

The ADS1225 and ADS1226 convert on command using a dedicated START pin. Simply pulse this pin to initiate a conversion. Data is read in a single cycle for retrieval over a 2-wire serial interface that easily connects to popular microcontrollers like the MSP430. After the conversion completes, the ADS1225 and ADS1226 automatically shuts down all circuitry.

Internal features include a two-channel multiplexer (ADS1226), selectable input buffer, temperature sensor, and oscillator. The full-scale range is defined by the external voltage reference with support provided for up to a 5V differential input signal. Two operating modes allow for speed (100SPS data rate, 15µVRMS noise) or resolution (4µVRMS noise, 16SPS data rate).

The ADS1225/6 supports 2.7 to 5.5V analog and digital supplies. Power consumption is 1mW while converting with 3V supplies. The ADS1225 and ADS1226 are fully specified over an extended industrial temperature range of -40°C to +105°C.

产品特性

  • 100SPS Data Rate (High-Speed Mode)
  • Single-Cycle Settling
  • Easy Conversion Control with START Pin
  • Automatic Shutdown
  • Low Noise: 4µVRMS Noise (High-Resolution Mode)
  • Input Multiplexer with Two Differential Channels (ADS1226)
  • Voltage Reference Supports Ratiometric Measurements
  • Self-Calibrating
  • Simple Read-Only 2-Wire Serial Interface
  • Internal High-Impedance Input Buffer
  • Internal Temperature Sensor
  • Internal Oscillator
  • Low-Power: 1mW While Operating, < 1µA During Shutdown
  • Analog and Digital Supplies: 2.7V to 5.5V
  • APPLICATIONS
    • Hand-Held Instrumentation
    • Portable Medical Equipment
    • Industrial Process Control

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