LTC2488IDE#PBF

LTC®2488 is a 4-channel (2-channel differential), 16bit, NoLatencyDS™ ADCwithEasyDrive™ 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 LTC2488 includes an integrated oscillator. This device can be configured to measure an external signal from a combinations of 4 analogue input channels operating in single ended or differential modes. It automatically rejects line frequencies of 50Hz and 60Hz simultaneously. Any combination of single-ended or differential inputs can be selected and the first conversion after a new channel selection is valid. 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
• Simultaneous 50Hz/60Hz rejection, 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, TA = 25°C)
• No latency digital filter settles in a single cycle, even after a new channel is selected
• Internal oscillator
• Resolution is 16bits (min, 0.1V ≤ VREF ≤ VCC, –FS ≤ VIN ≤ +FS)
• 14lead plastic DFN package, operating temperature range from -40°C to 85°C

附註

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