LTC2494CUHF#PBF

LTC®2494 is a 16-channel (8-differential), 16bit, no latency DS™ ADC with easy drive technology. 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 rail-to-rail input signals to be directly digitized while maintaining exceptional DC accuracy. The LTC2494 includes programmable gain, a high accuracy temperature sensor and an integrated oscillator. This device can be configured to measure an external signal (from combinations of 16 analogue input channels operating in single-ended or differential modes) or its internal temperature sensor. The integrated temperature sensor offers 1/2°C resolution and 2°C absolute accuracy. Application includes direct sensor digitizerm, direct temperature measurement, instrumentation, industrial process control.

• Easy drive technology enables Rail-to-Rail inputs with zero differential input current
• Directly digitizes high impedance sensors with full accuracy
• 600nV RMS noise, GND to VCC input/reference common mode range
• Programmable 50Hz, 60Hz or simultaneous 50Hz/60Hz rejection mode
• 2ppm INL, no missing codes
• Offset error is 0.5µV (typ, 2.5V ≤ VREF ≤ VCC, GND ≤ IN+ = IN– ≤ VCC)
• Positive full-scale error is 32ppm of VREF (max, 2.5V ≤ VREF ≤ VCC, IN+ = 0.75VREF, IN– = 0.25VREF)
• No latency digital filter settles in a single cycle, even after a new channel is selected
• Single-supply 2.7V to 5.5V operation range, internal oscillator
• 38 lead plastic QFN package, operating temperature range from 0°C to 70°C

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