1. Products
  2. A/D Converters (ADC)
  3. Precision A/D Converters
  4. Multiplexed A/D Converters
  5. LTC1859


Features and Benefits

  • Sample Rate: 100ksps
  • 8-Channel Multiplexer with ±25V Protection
  • Single 5V Supply
  • Software-Programmable Input Ranges:
    • 0V to 5V, 0V to 10V, ±5V or ±10V
    • Single Ended or Differential
  • ±3LSB INL for the LTC1859, ±1.5LSB INL for the LTC1858, ±1LSB INL for the LTC1857
  • Power Dissipation: 40mW (Typ)
  • SPI/MICROWIRE Compatible Serial I/O
  • Power Shutdown: Nap and Sleep
  • Signal-to-Noise Ratio: 87dB (Typ) for the LTC1859
  • Operates with Internal or External Reference
  • Internal Synchronized Clock
  • 28-Pin SSOP Package

Product Details

The LTC1857/LTC1858/LTC1859 are 8-channel, low power, 12-/14-/16-bit, 100ksps, analog-to-digital converters (ADCs). These SoftSpan ADCs can be software programmed for 0V to 5V, 0V to 10V, ±5V or ±10V input spans and operate from a single 5V supply. The 8-channel multiplexer can be programmed for single-ended inputs or pairs of differential inputs or combinations of both. In addition, all channels are fault protected to ±25V.  A fault condition on any channel will not affect the conversion result of the selected channel.

An onboard high performance sample-and-hold and precision reference minimize external components. The low 40mW power dissipation is made even more attractive with two user selectable power shutdown modes. DC specifications include ±3LSB INL for the LTC1859, ±1.5LSB INL for the LTC1858 and ±1LSB for the LTC1857.

The internal clock is trimmed for 5µs maximum conversion time and the sampling rate is guaranteed at 100ksps. A separate convert start input and data ready signal (BUSY) ease connections to FIFOs, DSPs and microprocessors.


  • Industrial Process Control
  • Multiplexed Data Acquisition Systems
  • High Speed Data Acquisition for PCs
  • Digital Signal Processing

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Tools & Simulations


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.

Purchase Linduino


Product Recommendations

LTC1859 Companion Parts

Recommended µModule Isolator

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
LTC1859CG#PBF Material Declaration Reliability Data 28-Lead SSOP
LTC1859CG#TRPBF Material Declaration Reliability Data 28-Lead SSOP
LTC1859IG#PBF Material Declaration Reliability Data 28-Lead SSOP
LTC1859IG#TRPBF Material Declaration Reliability Data 28-Lead SSOP
Wafer Fabrication Data R380 Reliability Data

PCN-PDN Information

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Sample & Buy

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Buy Now Pricing

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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.