LTC2344-18

Quad, 18-Bit, 400ksps/ch Differential SoftSpan ADC with Wide Input Common Mode Range

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Overview

Features and Benefits

  • 400ksps per Channel Throughput
  • Four Simultaneous Sampling Channels
  • ±4LSB INL (Maximum, ±4.096V Range)
  • Guaranteed 18-Bit, No Missing Codes
  • Differential, Wide Common Mode Range Inputs
  • Per-Channel SoftSpan Input Ranges:
    • ±4.096V, 0V to 4.096V, ±2.048V, 0V to 2.048V
    • ±5V, 0V to 5V, ±2.5V, 0V to 2.5V
  • 95dB Single-Conversion SNR (Typical)
  • −114dB THD (Typical) at fIN = 2kHz
  • 102dB CMRR (Typical) at fIN = 200Hz
  • Rail-to-Rail Input Overdrive Tolerance
  • Guaranteed Operation to 125°C
  • Integrated Reference and Buffer (4.096V)
  • SPI CMOS (1.8V to 5V) and LVDS Serial I/O
  • Internal Conversion Clock, No Cycle Latency
  • 81mW Power Dissipation (Typical)
  • 32-Lead (5mm × 5mm) QFN Package

Product Details

The LTC2344-18 is an 18-bit, low noise 4-channel simultaneous sampling successive approximation register (SAR) ADC with differential, wide common mode range inputs. Operating from a 5V supply and using the internal reference and buffer, each channel of this SoftSpan™ ADC can be independently configured on a conversion-by-conversion basis to accept ±4.096V, 0V to 4.096V, ±2.048V, or 0V to 2.048V signals. Individual channels may also be disabled to increase throughput on the remaining channels.

The wide input common mode range and 102dB CMRR of the LTC2344-18 analog inputs allow the ADC to directly digitize a variety of signals, simplifying signal chain design. This input signal flexibility, combined with ±4LSB INL, no missing codes at 18 bits, and 95dB SNR, makes the LTC2344-18 an ideal choice for many applications requiring wide dynamic range.

The LTC2344-18 supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces. Between one and four lanes of data output may be employed in CMOS mode, allowing the user to optimize bus width and throughput.

Applications

  • Programmable Logic Controllers
  • Industrial Process Control
  • Medical Imaging
  • High Speed Data Acquisition

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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)

Documentation

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

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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Linduino

Code Files

LTC2348 Linduino.CPP
LTC2348 Linduino Header File
LTC2348 - DC2094A.ino

Product Recommendations

LTC2344-18 Companion Parts

Recommended ADC Drivers

Recommended External Voltage References

Recommended Related Parts

Reference Materials

Product Selector Card (1)

Precision ADC Selector Guide

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.

LTC2344-18 Material Declaration
Quality And Reliability
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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.