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LTC2449 - 典型应用图例:
LTC2449典型应用图例一
LTC2449典型应用图例二
LTC2449 - 封装图解:
LTC2449封装图解一
LTC2449封装图解二
LTC2449封装图解三
LTC2449封装图解四
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Linear产品 - LTC2449介绍
LTC2449 - LTC2449是具可选速度/分辨率的 24 位高速 8/16 通道 ΔΣ ADC

LTC2449是Linear公司的一款无延迟增量累加 ADC产品,LTC2449是具可选速度/分辨率的 24 位高速 8/16 通道 ΔΣ ADC,本站介绍了LTC2449的封装应用图解、特点和优点、功能等,并给出了与LTC2449相关的凌力尔特元器件型号供参考。

LTC2449 - 具可选速度/分辨率的 24 位高速 8/16 通道 ΔΣ ADC

LTC2449 - 具可选速度/分辨率的 24 位高速 8/16 通道 ΔΣ ADC - 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)
    LTC2449CUHF 5x7 QFN-38 C $8.75 $7.15
    LTC2449CUHF#PBF 5x7 QFN-38 C $8.75 $7.15
    LTC2449CUHF#TR 5x7 QFN-38 C $7.25
    LTC2449CUHF#TRPBF 5x7 QFN-38 C $7.25
    LTC2449IUHF 5x7 QFN-38 I $10.15 $8.25
    LTC2449IUHF#PBF 5x7 QFN-38 I $10.15 $8.25
    LTC2449IUHF#TR 5x7 QFN-38 I $8.35
    LTC2449IUHF#TRPBF 5x7 QFN-38 I $8.35
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  • LTC2448 - 24-Bit High Speed 8-/16-Channel Delta Sigma ADCs with Selectable Speed/Resolution
  • LTC2400 - 24-Bit μPower No Latency Delta-Sigma? ADC in SO-8
  • LT3080 - 可调 1.1A、单电阻、低压差稳压器
  • LTC2378-20 - 具 0.5ppm INL 的 20 位、1Msps、低功率 SAR ADC
  • LTC2983 - 多传感器高准确度数字温度测量系统
  • LT4320 / LT4320-1 - 理想二极管桥控制器
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  • LTC1262 - LTC1262是12V, 30mA Flash Memory Programming Supply
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  • LTC3810-5 - LTC3810-5是60V 电流模式同步开关稳压控制器
  • LT582X - LT582X是200°C 电压基准
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