LTC2484 Datasheet | Linear Technology

24-Bit ∆Σ ADC with Easy Drive Input Current Cancellation Features Description n Easy Drive Technology Enables Rail-to-Rail Inputs with Zero Differential Input Current n Directly Digitizes High Impedance Sensors with Full Accuracy n 600n VRMS Noise n GND to VCC Input/Reference mon Mode Range n Programmable 50Hz, 60Hz or Simultaneous 50Hz/60Hz Rejection Mode n2ppm INL, No Missing Codes n1ppm Offset and 15ppm Total Unadjusted Error n Selectable 2× Speed Mode (15Hz Using Internal Oscillator) 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 Applications 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®2484 bines a 24-bit No Latency ∆Σ™ analogto-digital converter with patented Easy Drive™ technology. The patented sampling scheme eliminates dynamic input current errors and the shortings 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 mon mode input range (0V to VCC) independent of the reference voltage. The reference can be as low as 100m V 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. L, LT, LTC and LTM, Linear Technology and the Linear...