LTC2488

PRODUCTION

16-Bit 2-/4-Channel ΔΣ ADC with Easy Drive Input Current Cancellation

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Overview

  • 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 (0.02LSB Transition Noise)
  • GND to VCC Input/Reference Common Mode Range
  • Simultaneous 50Hz/60Hz Rejection
  • 2ppm INL, No Missing Codes
  • 1ppm Offset and 15ppm Full-Scale Error
  • 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 4mm × 3mm DFN Package

The LTC2488 is a 4-channel (2-channel differential), 16-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 LTC2488 includes 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. It automatically rejects line frequencies of 50Hz and 60Hz simultaneously.

The LTC2488 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
LTC2488
16-Bit 2-/4-Channel ΔΣ ADC with Easy Drive Input Current Cancellation
Data Acquisition System Fullscale Error vs Source Resistance Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 2

Technical Articles 1

Data Sheet

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Matched Resistors & Transistors 1
LT5400
RECOMMENDED FOR NEW DESIGNS Quad Matched Resistor Network
Oscillators 1
LTC6991
PRODUCTION TimerBlox: Resettable, Low Frequency Oscillator
Temperature Sensors 1
LTC2995
PRODUCTION Temperature Sensor and Dual Voltage Monitor with Alert Outputs
Voltage References 1
LT6660
PRODUCTION Tiny Micropower Precision Series References in 2mm × 2mm DFN
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Evaluation Kits

eval board
schematic 1
DC1009A-B

LTC2488 16-bit 2-channel ADC, requires DC590

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Product Details

DC1009A-B: Demo Board for the LTC2488 16-Bit 2-/4-Channel Delta Sigma ADC with Easy Drive Input Current Cancellation.
DC1009A-B
LTC2488 16-bit 2-channel ADC, requires DC590
DC1009A-A - Schematic

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