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LTC2483 Datasheet(PDF) 1 Page - Linear Technology |
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LTC2483 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 32 page  1 LTC2483 2483f RSOURCE (Ω) 1 –20 0 20 1k 100k –40 –60 –80 10 100 10k 40 60 80 VCC = 5V VREF = 5V VIN + = 3.75V VIN – = 1.25V FO = GND TA = 25°C CIN = 1µF 2483 TA02 ■ Direct Sensor Digitizer ■ Weight Scales ■ Direct Temperature Measurement ■ Strain Gauge Transducers ■ Instrumentation ■ Industrial Process Control ■ DVMs and Meters 16-Bit ∆Σ ADC with Easy Drive Input Current Cancellation and I2C Interface ■ Easy Drive Technology Enables Rail-to-Rail Inputs with Zero Differential Input Current ■ Directly Digitizes High Impedance Sensors with Full Accuracy ■ 600nV RMS Noise, Independent of VREF ■ GND to VCC Input/Reference Common Mode Range ■ 2-Wire I2C Interface ■ Simultaneous 50Hz/60Hz Rejection ■ 2ppm (0.25LSB) INL, No Missing Codes ■ 1ppm Offset and 15ppm Full-Scale Error ■ 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 FEATURES DESCRIPTIO APPLICATIO S TYPICAL APPLICATIO The LTC ®2483combinesa16-bitplussignNoLatency ∆ΣTM analog-to-digital converter with patented Easy Drive TM tech- nology 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-to- rail input range to be directly digitized while maintaining exceptional DC accuracy. The LTC2483 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 noise level is 600nV RMS independent of VREF. This allows direct digitization of low level signals with 16- bit accuracy. The LTC2483 includes an on-chip trimmed oscillator, eliminating the need for external crystals or oscillators and provides 87dB rejection of 50Hz and 60Hz line frequency noise. Absolute accuracy and low drift are automatically maintained through continuous, transpar- ent, offset and full-scale calibration. +FS Error vs RSOURCE at IN + and IN– LTC2483 VIN + REF+ VCC VCC GND VIN – 1 µF SDA 2-WIRE I2C INTERFACE 1 µF 10k IDIFF = 0 10k CA0/F0 2483 TA01 CA1 SCL 6 ADDRESSES REF– SENSE , LTC and LT are registered trademarks of Linear Technology Corporation. No Latency ∆Σ and Easy Drive are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Patent Pending. |
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