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LTC2444 - 典型应用图例：
LTC2444典型应用图例一
LTC2444典型应用图例二
LTC2444 - 封装图解：
LTC2444封装图解一
LTC2444封装图解二
LTC2444封装图解三
LTC2444封装图解四
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LINEAR产品 - LTC2444介绍

LTC2444 - LTC2444是24-Bit High Speed 8-/16-Channel Delta Sigma ADCs with Selectable Speed/Resolution

LTC2444是LINEAR凌力尔特公司的一款无延迟增量累加 ADC产品，LTC2444是LTC2444是24-Bit High Speed 8-/16-Channel Delta Sigma ADCs with Selectable Speed/Resolution，本站介绍了LTC2444的封装应用图解、特点和优点、功能等，并给出了与LTC2444相关的LINEAR元器件型号供参考。

LTC2444 - LTC2444是24-Bit High Speed 8-/16-Channel Delta Sigma ADCs with Selectable Speed/Resolution - 无延迟增量累加 ADC - 数据转换 - 凌力尔特

LTC2444 - 24-Bit High Speed 8-/16-Channel Delta Sigma ADCs with Selectable Speed/Resolution

LTC2444 - 24-Bit High Speed 8-/16-Channel Delta Sigma ADCs with Selectable Speed/Resolution - Linear Technology（凌力尔特）

功能描述

The LTC2444/LTC2445/LTC2448/LTC2449 are 8-/16- channel (4-/8-differential) high speed 24-bit No Latency Delta SigmaTM ADCs. They use a proprietary delta-sigma architecture enabling variable speed/resolution. Through a simple 4-wire serial interface, ten speed/resolution combinations 6.9Hz/280nVRMS to 3.5kHz/25μVRMS (4kHz with external oscillator) can be selected with no latency between conversion results or shift in DC accuracy (offset, full-scale, linearity, drift). Additionally, a 2X speed mode can be selected enabling output rates up to 7kHz (8kHz if an external oscillator is used) with one cycle latency.

Any combination of single-ended or differential inputs can be selected with a common mode input range from ground to VCC, independent of VREF. While operating in the 1X speed mode the first conversion following a new speed, resolution, or channel selection is valid. Since there is no settling time between conversions, all 8 differential channels can be scanned at a rate of 500Hz. At the conclusion of each conversion, the converter is internally reset eliminating any memory effects between successive conversions and assuring stability of the high order delta-sigma modulator.

特点
  • Up to 8 Differential or 16 Single-Ended Input Channels
  • Up to 8kHz Output Rate
  • Up to 4kHz Multiplexing Rate
  • Selectable Speed/Resolution
  • 2μVRMS Noise at 1.76kHz Output Rate
  • 200nVRMS Noise at 13.8Hz Output Rate with Simultaneous 50/60Hz Rejection
  • Guaranteed Modulator Stability and Lock-Up Immunity for any Input and Reference Conditions
  • 0.0005% INL, No Missing Codes
  • Autosleep Enables 20μA Operation at 6.9Hz
  • <5μV Offset (4.5V < VCC < 5.5V, 40°C to 85°C)
  • Differential Input and Differential Reference with GND to VCC Common Mode Range
  • No Latency Mode, Each Conversion is Accurate Even After a New Channel is Selected
  • Internal Oscillator-No External Components
  • LTC2445/LTC2449 Include MUXOUT/ADCIN for External Buffering or Gain
  • Tiny QFN 5mm x 7mm Package
    • 应用
  • High Speed Multiplexing
  • Weight Scales
  • Auto Ranging 6-Digit DVMs
  • Direct Temperature Measurement
  • High Speed Data Acquisition
    • 以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）
    器件型号 封装 温度 价格 (以 1 ~ 99 片为批量) 价格 (以 1000 片为批量)
    LTC2444CUHF 5x7 QFN-38 C $7.95 $6.45
    LTC2444CUHF#PBF 5x7 QFN-38 C $7.95 $6.45
    LTC2444CUHF#TR 5x7 QFN-38 C $6.55
    LTC2444CUHF#TRPBF 5x7 QFN-38 C $6.55
    LTC2444IUHF 5x7 QFN-38 I $9.15 $7.45
    LTC2444IUHF#PBF 5x7 QFN-38 I $9.15 $7.45
    LTC2444IUHF#TR 5x7 QFN-38 I $7.55
    LTC2444IUHF#TRPBF 5x7 QFN-38 I $7.55
    下面可能是您感兴趣的Linear Technology（凌力尔特）元器件
  • LTC2440 - 具可选速度/分辨率的 24 位高速差分 ΔΣ ADC
  • LTC2442 - 具集成型放大器的 24 位、高速、4 通道 ΔΣ ADC
  • LTC6655 - 0.25ppm 噪声、低漂移、精准基准系列
  • LTC2449 - 具可选速度/分辨率的 24 位高速 8/16 通道 ΔΣ ADC
  • LTC2400 - 24-Bit μPower No Latency Delta-Sigma? ADC in SO-8
  • LTC2445 - 24-Bit High Speed 8-/16-Channel Delta Sigma ADCs with Selectable Speed/Resolution
  • LTC2448 - 24-Bit High Speed 8-/16-Channel Delta Sigma ADCs with Selectable Speed/Resolution
  • LT5400 - 四个匹配的电阻器
  • LTC2447 - 24-Bit High Speed 8-Channel Delta Sigma ADCs with Selectable Multiple Reference Inputs
  • LTC2446 - 24-Bit High Speed 8-Channel Delta Sigma ADCs with Selectable Multiple Reference Inputs
    • 下面可能是您感兴趣的凌力尔特公司无延迟增量累加 ADC元器件
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