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AD4130-8 is an ultra-low power, high precision, measurement solution for low bandwidth battery operated applications. The fully integrated AFE (Analog Front-End) includes a multiplexer for up to 16 single-ended or 8 differential inputs, PGA (Programmable Gain Amplifier), 24-bit Sigma-Delta ADC, on-chip reference and oscillator, selectable filter options, smart sequencer, sensor biasing and excitation options, diagnostics, and a FIFO buffer. Signed-off-by: Cosmin Tanislav <cosmin.tanislav@analog.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20221021104115.1812486-3-demonsingur@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
37 lines
1.6 KiB
Plaintext
37 lines
1.6 KiB
Plaintext
What: /sys/bus/iio/devices/iio:deviceX/in_voltage-voltage_filter_mode_available
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KernelVersion: 6.2
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Contact: linux-iio@vger.kernel.org
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Description:
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Reading returns a list with the possible filter modes.
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"sinc4" - Sinc 4. Excellent noise performance. Long 1st
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conversion time. No natural 50/60Hz rejection.
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"sinc4+sinc1" - Sinc4 + averaging by 8. Low 1st conversion time.
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"sinc3" - Sinc3. Moderate 1st conversion time. Good noise
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performance.
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"sinc3+rej60" - Sinc3 + 60Hz rejection. At a sampling frequency
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of 50Hz, achieves simultaneous 50Hz and 60Hz
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rejection.
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"sinc3+sinc1" - Sinc3 + averaging by 8. Low 1st conversion time.
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Best used with a sampling frequency of at least
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216.19Hz.
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"sinc3+pf1" - Sinc3 + Post Filter 1.
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53dB rejection @ 50Hz, 58dB rejection @ 60Hz.
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"sinc3+pf2" - Sinc3 + Post Filter 2.
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70dB rejection @ 50Hz, 70dB rejection @ 60Hz.
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"sinc3+pf3" - Sinc3 + Post Filter 3.
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99dB rejection @ 50Hz, 103dB rejection @ 60Hz.
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"sinc3+pf4" - Sinc3 + Post Filter 4.
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103dB rejection @ 50Hz, 109dB rejection @ 60Hz.
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What: /sys/bus/iio/devices/iio:deviceX/in_voltageY-voltageZ_filter_mode
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KernelVersion: 6.2
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Contact: linux-iio@vger.kernel.org
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Description:
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Set the filter mode of the differential channel. When the filter
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mode changes, the in_voltageY-voltageZ_sampling_frequency and
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in_voltageY-voltageZ_sampling_frequency_available attributes
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might also change to accommodate the new filter mode.
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If the current sampling frequency is out of range for the new
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filter mode, the sampling frequency will be changed to the
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closest valid one.
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