24-Bit High Speed 8-/16-Channel ∆∑ ADCs with Selectable Speed/Resolution

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Part Details
Part Models 4
1ku List Price Starting From $9.39
  • 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
Additional Details
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The LTC2444/LTC2445/LTC2448/LTC2449 are 8-/16- channel (4-/8-differential) high speed 24-bit No Latency ∆∑ 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.


  • High Speed Multiplexing
  • Weight Scales
  • Auto Ranging 6-Digit DVMs
  • Direct Temperature Measurement
  • High Speed Data Acquisition
Part Models 4
1ku List Price Starting From $9.39

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LTC2448UHF | 24-Bit High Speed 8-/16-Channel Delta Sigma ADC (Requires DC590)

Tools & Simulations

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Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.

Linduino code repository on GitHub and instructions on how to use the code.

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