LTC2481IDD#PBF

LTC®2481 combines a 16-bit plus sign no Latency ∆Σ™ 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-to rail input range to be directly digitized while maintaining exceptional DC accuracy. It includes on-chip programmable gain and an oscillator. It 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. Typical applications are direct sensor digitizer, 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, 2-wire I2C interface
• Programmable gain from 1 to 256, GND to VCC input/reference common mode range
• 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
• Internal oscillator, six addresses available and one global address for synchronization
• Offset error is 0.5mV (2.5V ≤ VREF ≤ VCC, GND ≤ IN+=IN– ≤ VCC, TA=25°C)
• Output noise is 0.84µVRMS (5V ≤ VCC ≤ 5.5V, VREF=5V, GND ≤ IN–=IN+ ≤ VCC, TA=25°C)
• 10-lead plastic DFN package
• Temperature rating range from –40°C to 85°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party