LTC2481
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LTC2481

16-Bit ∆Σ ADC with Easy Drive Input Current Cancellation and I²C Interface

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Part Details
Part Models 6
1ku List Price Starting From $2.25
Features
  • Easy Drive Technology Enables Rail-to-Rail Inputs with Zero Differential Input Current
  • Directly Digitizes High Impedance Sensors with Full Accuracy
  • Programmable Gain from 1 to 256
  • GND to VCC Input/Reference Common Mode Range
  • 2-Wire I2C Interface
  • Programmable 50Hz, 60Hz or Simultaneous 50Hz/60Hz Rejection Mode
  • 2ppm (0.25LSB) INL, No Missing Codes
  • 1ppm Offset and 15ppm Full-Scale Error
  • Selectable 2x Speed Mode
  • No Latency: Digital Filter Settles in a Single Cycle
  • Single Supply 2.7V to 5.5V Operation
  • Internal Oscillator
  • Six Addresses Available and One Global Address for Synchronization
  • Available in a Tiny (3mm × 3mm) 10-Lead DFN Package
Additional Details
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The LTC2481 combines a 16-bit plus sign No Latency ΔΣ analog-to-digital converter with patented Easy Drive technology and I2C digital 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 input signals, with rail-torail input range to be directly digitized while maintaining exceptional DC accuracy.

The LTC2481 includes on-chip programmable gain and an oscillator. The LTC2481 can be configured through an I2C interface to provide a programmable gain from 1 to 256 in 8 steps, to digitize an external signal or internal temperature sensor, reject line frequencies (50Hz, 60Hz or simultaneous 50Hz/60Hz) as well as a 2x speed-up mode.

The LTC2481 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 LTC2481 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 6
1ku List Price Starting From $2.25

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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)

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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)

LTC2481CDD#PBF

PRODUCTION

LTC2481CDD#TRPBF

PRODUCTION

LTC2481HDD#PBF

PRODUCTION

LTC2481HDD#TRPBF

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