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The AD7176-2 has a maximum output data rate of 250 kSPS but a channel scan rate of 50 kSPS/channel. What does this mean?
When operating on a single channel the AD7176-2 can output data at up to 250 kSPS. However, when more than one channel is enabled the full filter settling time must be allowed for each channel. The data rate for fully settled data is 50 kSPS. So, if using 2 channels the output data rate for each channel is 50 kSPS/2 which is 25 kSPS.