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LTC2482 Datasheet(PDF) 1 Page - Linear Technology |
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LTC2482 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 32 page  LTC2482 1 2482fb TYPICAL APPLICATION FEATURES APPLICATIONS DESCRIPTION 16-Bit ΔΣ ADC with Easy Drive Input Current Cancellation L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. No Latency ΔΣ and Easy Drive are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Patent pending. +FS Error vs RSOURCE at IN+ and IN– n Easy Drive Technology Enables Rail-to-Rail Inputs with Zero Differential Input Current n Directly Digitizes High Impedance Sensors with Full Accuracy n 600nV RMS Noise, Independent of VREF n Operates with a Reference as Low as 100mV with 16-Bit Resolution n GND to VCC Input/Reference Common Mode Range n Simultaneous 50Hz/60Hz Rejection Mode n 2ppm INL, No Missing Codes n 1ppm Offset and 15ppm Total Unadjusted Error n No Latency: Digital Filter Settles in a Single Cycle n Single Supply 2.7V to 5.5V Operation n Internal Oscillator n Available in a Tiny (3mm × 3mm) 10-Lead DFN Package n Direct Sensor Digitizer n Weight Scales n Direct Temperature Measurement n Strain Gauge Transducers n Instrumentation n Industrial Process Control n DVMs and Meters The LTC ®2482 combines a 16-bit plus sign No Latency ΔΣ™analog-to-digitalconverterwithpatentedEasyDrive™ technology. The patented sampling scheme eliminates dynamic input current errors and the shortcomings of on-chip buffering through automatic cancellation of dif- ferential 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 LTC2482 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 LTC2482 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, transparent, offset and full-scale calibration. RSOURCE (Ω) 1 –20 0 20 1k 100k 2482 TA02 –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 LTC2482 VREF VCC VCC GND fO 1μF SDO 3-WIRE SPI INTERFACE 1μF 10k IDIFF = 0 10k SCK 2482 TA01 CS SENSE VIN + VIN – |
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