LTC2489
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LTC2489

16-Bit 2-/4-Channel ∆Σ ADC with Easy Drive Input Current Cancellation and I2C Interface

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Part Details
Part Models 4
1ku List Price Starting From $2.60
Features
  • 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
  • 2-Wire I2C Interface with 9 Addresses Plus One Global Address for Synchronization
  • 600nV RMS 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
Additional Details
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The LTC2489 is a 4-channel (2-channel differential), 16-bit, No Latency ΔΣ ADC with Easy Drive technology and a 2-wire, I2C interface. 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 LTC2489 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 LTC2489 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 is selected, is valid. Access to the multiplexer output enables optional external amplifiers to be shared between all analog inputs and auto calibration continuously removes their associated offset and drift.

Applications

  • Direct Sensor Digitizer
  • Direct Temperature Measurement
  • Instrumentation
  • Industrial Process Control
Part Models 4
1ku List Price Starting From $2.60

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Documentation

Documentation

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Product Lifecycle

PCN

Feb 20, 2022

- 21_0269

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

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PRODUCTION

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LTC2489IDE#PBF

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Product Lifecycle

PCN

Feb 20, 2022

- 21_0269

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Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC2489CDE#PBF

PRODUCTION

LTC2489CDE#TRPBF

PRODUCTION

LTC2489IDE#PBF

PRODUCTION

LTC2489IDE#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

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Evaluation Kit

Evaluation Kits 1

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DC1010A-B

LTC2489 | 16-Bit 4/2-Channel I2C Easy Drive ΔΣ ADC (Requires DC590B)

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