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ADS1225

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具有差分输入和内部振荡器的 24 位 100SPS ADC

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ADS1225

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产品详情

Resolution (Bits) 24 Sample rate (max) (ksps) 0.1 Number of input channels 1 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Rating Catalog Reference mode External Input voltage range (max) (V) 5.5 Input voltage range (min) (V) 0 Features Oscillator, Temp Sensor Operating temperature range (°C) -40 to 105 Power consumption (typ) (mW) 1.6 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.5 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.5
Resolution (Bits) 24 Sample rate (max) (ksps) 0.1 Number of input channels 1 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Rating Catalog Reference mode External Input voltage range (max) (V) 5.5 Input voltage range (min) (V) 0 Features Oscillator, Temp Sensor Operating temperature range (°C) -40 to 105 Power consumption (typ) (mW) 1.6 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.5 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.5
VQFN (RGV) 16 16 mm² (4 mm × 4 mm)
  • 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
  • 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

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.

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.
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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 24-Bit A/D Converter with One- and Two-Channel Differential Inputs and Int Osc 数据表 (Rev. C) 2008-12-10
应用手册 QFN 和 SON PCB 连接 (Rev. C) PDF | HTML 英语版 (Rev.C) PDF | HTML 2024-1-5
应用手册 Δ-Σ ADC 中的数字滤波器类型 (Rev. A) PDF | HTML 英语版 (Rev.A) PDF | HTML 2023-4-13
模拟设计期刊 Enabling precision delta‐sigma ADCs in functional safety applications 2020-3-19
电子书 Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 2015-3-19

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ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

模拟工程师计算器旨在加快模拟电路设计工程师经常运用的许多重复性计算。该基于 PC 的工具提供图形界面，其中显示各种常见计算列表，从使用反馈电阻器设置运算放大器增益到选择合适的电路设计元件，以稳定模数转换器 (ADC) 驱动器缓冲器电路。

除了可用作独立工具之外，该计算器还能很好地与模拟工程师口袋参考中所述的概念配合使用。

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VQFN (RGV) 16 Ultra Librarian
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