LTC2480HMS#PBF

LTC2480HMS#PBF is a 16bit ∆Σ ADC with easy drive input current cancellation. The patented sampling scheme eliminates dynamic input current errors and the shortcomings of on-chip buffering through the 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. It includes an on-chip programmable gain and an oscillator. It can be configured to provide a programmable gain from 1 to 256 in 8 steps, measure an external signal or internal temperature sensor, and reject line frequencies. 50Hz, 60Hz or simultaneous 50Hz/60Hz line frequency rejection can be selected as well as a 2x speed-up mode. Applications include direct sensor digitizers, weight scales, direct temperature measurement, strain gauge transducers, instrumentation, industrial process control, DVMs and meters.

• 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, internal oscillator
• Single supply operation range from 2.7V to 5.5V
• Integral nonlinearity is 2ppm of VREF typ at (5V ≤ VCC ≤ 5.5V, VREF = 5V, VIN(CM) = 2.5V)
• Offset error is 0.5µV typical at (2.5V ≤ VREF ≤ VCC, GND ≤ IN+ = IN– ≤ VCC)
• Total unadjusted error is 15ppm of VREF typ at (5V ≤ VCC ≤ 5.5V, VREF = 2.5V, VIN(CM) = 1.25V)
• Supply current is 160µA (conversion mode, TA = 25°C)
• Internal SCK frequency is 38.4KHz typical at (TA = 25°C)
• Operating temperature range from -40°C to 125°C, 10-lead plastic MSOP package

附註

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