LTC2484
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LTC2484

24-Bit ΔΣ ADC with Easy Drive Input Current Cancellation

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Part Details
Part Models 4
1ku List Price Starting From $2.95
Features
  • Easy Drive Technology Enables Rail-to-Rail Inputs with Zero Differential Input Current
  • Directly Digitizes High Impedance Sensors with Full Accuracy
  • 600nVRMS Noise
  • 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 Total Unadjusted Error
  • Selectable 2× Speed Mode (15Hz Using Internal Oscillator)
  • No Latency: Digital Filter Settles in a Single Cycle
  • Single Supply 2.7V to 5.5V Operation
  • Internal Oscillator
  • Available in a Tiny (3mm × 3mm) 10-Lead DFN Package
Additional Details
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The LTC2484 combines a 24-bit No Latency ΔΣ analog-to-digital converter with patented 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 input signals with rail-to-rail input range to be directly digitized while maintaining exceptional DC accuracy.

The LTC2484 includes an on-chip oscillator. The LTC2484 can be configured to reject line frequencies. 50Hz, 60Hz or simultaneous 50Hz/60Hz line frequency rejection can be selected as well as a 2× speed-up mode.

The LTC2484 allows a wide common mode input range (0V to VCC) independent of the reference voltage. The reference can be as low as 100mV or can be tied directly to VCC. The LTC2484 includes an on-chip trimmed oscillator, eliminating the need for external crystals or oscillators. Absolute accuracy and low drift are automatically maintained through continuous, transparent, offset and full-scale calibration.

Applications

  • Direct Sensor Digitizer
  • Weight Scales
  • Direct Temperature Measurement
  • Strain Gauge Transducers
  • Instrumentation
  • Industrial Process Control
  • DVMs and Meters
Part Models 4
1ku List Price Starting From $2.95

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC2484CDD#PBF
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LTC2484CDD#TRPBF
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LTC2484IDD#PBF
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LTC2484IDD#TRPBF
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Product Lifecycle

PCN

Jun 30, 2020

- 20_0244

Notification of Wafer Fab Location Change for 0.6µm CMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LTC2484CDD#PBF

PRODUCTION

LTC2484CDD#TRPBF

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LTC2484IDD#PBF

PRODUCTION

LTC2484IDD#TRPBF

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Filter by Model

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Part Models

Product Lifecycle

PCN

Jun 30, 2020

- 20_0244

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Notification of Wafer Fab Location Change for 0.6µm CMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LTC2484CDD#PBF

PRODUCTION

LTC2484CDD#TRPBF

PRODUCTION

LTC2484IDD#PBF

PRODUCTION

LTC2484IDD#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

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Evaluation Kit

Evaluation Kits 1

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DC939A

LTC2484IDD Demo Board | 24-Bit Delta Sigma ADC w/Temp (requires DC2026)

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DC939A

LTC2484IDD Demo Board | 24-Bit Delta Sigma ADC w/Temp (requires DC2026)

LTC2484IDD Demo Board | 24-Bit Delta Sigma ADC w/Temp (requires DC2026)

Product Detail

Demonstration circuit DC939 features the LTC2484, a 24-bit high performance DS analog-to-digital converter (ADC). The LTC2484 features 2ppm linearity, 0.5mV offset, and 600nV RMS noise. The input is fully differential, with input common mode rejection of 140 dB. The LTC2484 is available in a 10 pin DFN package and has an easy to use SPI interface. DC939 is a member of ADI's QuickEval family of demonstration boards. It is designed to allow easy evaluation of the LTC2484 and may be connected directly to the target application’s analog signals while using the DC590 USB Serial Controller board and supplied software to measure performance. The exposed ground planes allow proper grounding to prototype circuitry. After evaluating with ADI's software, the digital signals can be connected to the end application’s processor / controller for development of the serial interface.

Tools & Simulations

Tools & Simulations 1

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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