Features and Benefits

  • ±0.5ppm INL (Typ)
  • 145dB Dynamic Range (Typ) at 61sps
  • 131dB Dynamic Range (Typ) at 4ksps
  • Guaranteed 32-Bits No Missing Codes
  • Configurable Digital Filter with Synchronization
    • Relaxed Anti-Aliasing Filter Requirements
  • Dual Output 32-Bit SAR ADC
    • 32-Bit Digitally Filtered Low Noise Output
    • 14-Bit Differential + 8-Bit Common Mode 1Msps No Latency Output
  • Wide Input Common-Mode Range
  • Guaranteed Operation to 85°C
  • 1.8V to 5V SPI-Compatible Serial I/O
  • Low Power: 24mW at 1Msps
  • 24-Lead 7mm × 4mm DFN Package

Product Details

The LTC2508-32 is a low noise, low power, high-performance 32-bit ADC with an integrated configurable digital filter. Operating from a single 2.5V supply, the LTC2508-32 features a fully differential input range up to ±VREF , with VREF ranging from 2.5V to 5.1V. The LTC2508-32 supports a wide common mode range from 0V to VREF simplifying analog signal conditioning requirements.

The LTC2508-32 simultaneously provides two output codes: (1) a 32-bit digitally filtered high precision low noise code, and (2) a 22-bit no latency composite code. The configurable digital filter reduces measurement noise by lowpass filtering and down-sampling the stream of data from the SAR ADC core, giving the 32-bit filtered output code. The 22-bit composite code consists of a 14-bit code representing the differential voltage and an 8-bit code representing the common mode voltage. The 22-bit composite code is available each conversion cycle, with no cycle of latency.

The digital filter can be easily configured for 4 different down-sampling factors by pin strapping. The configurations provide a dynamic range of 131dB at 3.9ksps and 145dB at 61sps. The digital lowpass filter relaxes the requirements for analog anti-aliasing. Multiple LTC2508-32 devices can be easily synchronized using the SYNC pin.


  • Seismology
  • Energy Exploration
  • Automated Test Equipment (ATE)
  • High-Accuracy Instrumentation

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Software & Systems Requirements

Evaluation Software

LinearLab Tools

A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards.

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.

Download LTSketchbook

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Precision ADC Driver Tool

The Precision ADC Driver Tool is a web application that simulates the performance of precision ADC and driver combinations. Potential issues with driver selection, kickback settling, and distortion are flagged, and design tradeoffs can be quickly evaluated. Simulations and calculations include system noise, distortion, and settling of the ADC input


Software and Simulation

Product Recommendations

LTC2508-32 Companion Parts

Recommended ADC Drivers

Recommended External Voltage References

Recommended Related Parts

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.

Support & Discussions

LTC2508-32 Discussions

RE: ADAU1452 PEQ safeload
2 day(s) ago in SigmaDSP Processors and SigmaStudio Development Tool
RE: ADF4351 Evaluation Board with USB connector
2 day(s) ago in RF and Microwave

Sample & Buy

Sample & Buy functionality exists in desktop site
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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

Price Table Help


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.