Overview

Features and Benefits

  • Up to 2 Differential or 4 Single-Ended Inputs
  • Easy Drive Technology Enables Rail-to-Rail Inputs with Zero Differential Input Current
  • Directly Digitizes High Impedance Sensors with Full Accuracy
  • 600nVRMS Noise
  • Integrated High Accuracy Temperature Sensor
  • GND to VCC Input/Reference Common Mode Range
  • Programmable 50Hz, 60Hz, or Simultaneous 50Hz/60Hz Rejection Mode
  • 2ppm INL, No Missing Codes
  • 1ppm Offset and 15ppm Full-Scale Error
  • 2x Speed Mode/Reduced Power Mode (15Hz Using Internal Oscillator and 80μA at 7.5Hz Output)
  • No Latency: Digital Filter Settles in a Single Cycle, Even After a New Channel is Selected
  • Single Supply 2.7V to 5.5V Operation (0.8mW)
  • Internal Oscillator
  • Tiny DFN 4mm × 3mm Package

Product Details

The LTC2492 is a 4-channel (2-channel differential), 24-bit, No Latency ΔΣ ADC with Easy Drive technology. The patented sampling scheme eliminates dynamic input current errors and the shortcomings of on-chip buffering through automatic cancellation of differential input current. This allows large external source impedances and rail-to-rail input signals to be directly digitized while maintaining exceptional DC accuracy.

The LTC2492 includes a high accuracy temperature sensor and an integrated oscillator. This device can be configured to measure an external signal (from combinations of 4 analog input channels operating in single-ended or differential modes) or its internal temperature sensor. It can be programmed to reject line frequencies of 50Hz, 60Hz, or simultaneous 50Hz/60Hz and configured to double its output rate. The integrated temperature sensor offers 1/30th°C resolution and 2°C absolute accuracy.

The LTC2492 allows a wide common mode input range (0V to VCC), independent of the reference voltage. Any combination of single-ended or differential inputs can be selected and the first conversion after a new channel selection is valid.

Applications

  • Direct Sensor Digitizer
  • Direct Temperature Measurement
  • Instrumentation
  • Industrial Process Control

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)

Software & Systems Requirements

Evaluation Software

QuikEval

The QuikEval system is a USB-based product demonstration and data acquisition system that allows users to quickly evaluate the performance of products. The system consists of a USB Data Acquisition Controller board (DC590B) that connects to individual daughter cards for specific products.

Tools & Simulations

Linduino

Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits.

Linduino

Product Recommendations

LTC2492 Companion Parts

Recommended µModule Isolator

Recommended External Voltage References

Recommended Related Parts

Recommended Suggested Oscillator

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.

Discussions

LTC2492 Discussions

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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.


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Evaluation Boards Pricing displayed is based on 1-piece.
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.