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@xxxxxxxxxx> --- .../ABI/testing/sysfs-bus-iio-adc-ad4130 | 36 +++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-adc-ad4130 diff --git a/Documentation/ABI/testing/sysfs-bus-iio-adc-ad4130 b/Documentation/ABI/testing/sysfs-bus-iio-adc-ad4130 new file mode 100644 index 000000000000..942150991e75 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-iio-adc-ad4130 @@ -0,0 +1,36 @@ +What: /sys/bus/iio/devices/iio:deviceX/in_voltage-voltage_filter_mode_available +KernelVersion: +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Reading returns a list with the possible filter modes. + "sinc4" - Sinc 4. Excellent noise performance. Long 1st + conversion time. No natural 50/60Hz rejection. + "sinc4+sinc1" - Sinc4 + averaging by 8. Low 1st conversion time. + "sinc3" - Sinc3. Moderate 1st conversion time. Good noise + performance. + "sinc3+rej60" - Sinc3 + 60Hz rejection. At a sampling frequency + of 50Hz, achieves simultaneous 50Hz and 60Hz + rejection. + "sinc3+sinc1" - Sinc3 + averaging by 8. Low 1st conversion time. + Best used with a sampling frequency of at least + 216.19Hz. + "sinc3+pf1" - Sinc3 + Post Filter 1. + 53dB rejection @ 50Hz, 58dB rejection @ 60Hz. + "sinc3+pf2" - Sinc3 + Post Filter 2. + 70dB rejection @ 50Hz, 70dB rejection @ 60Hz. + "sinc3+pf3" - Sinc3 + Post Filter 3. + 99dB rejection @ 50Hz, 103dB rejection @ 60Hz. + "sinc3+pf4" - Sinc3 + Post Filter 4. + 103dB rejection @ 50Hz, 109dB rejection @ 60Hz. + +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY-voltageZ_filter_mode +KernelVersion: +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Set the filter mode of the differential channel. When the filter + mode changes, the in_voltageY-voltageZ_sampling_frequency and + in_voltageY-voltageZ_sampling_frequency_available attributes + might also change to accomodate the new filter mode. + If the current sampling frequency is out of range for the new + filter mode, the sampling frequency will be changed to the + closest valid one. -- 2.35.1
