Documentation/iio/ad7380.rst

1 .. SPDX-License-Identifier: GPL-2.0-only
23 * `AD7380-4 <https://www.analog.com/en/products/ad7380-4.html>`_
24 * `AD7381-4 <https://www.analog.com/en/products/ad7381-4.html>`_
25 * `AD7383-4 <https://www.analog.com/en/products/ad7383-4.html>`_
26 * `AD7384-4 <https://www.analog.com/en/products/ad7384-4.html>`_
27 * `AD7386-4 <https://www.analog.com/en/products/ad7386-4.html>`_
28 * `AD7387-4 <https://www.analog.com/en/products/ad7387-4.html>`_
29 * `AD7388-4 <https://www.analog.com/en/products/ad7388-4.html>`_
36 ----------------
38 ad738x ADCs can output data on several SDO lines (1/2/4). The driver currently
42 -----------------
44 ad7380-4
47 ad7380-4 supports only an external reference voltage (2.5V to 3.3V). It must be
48 declared in the device tree as ``refin-supply``.
55 - Internal reference (2.5V)
56 - External reference (2.5V to 3.3V)
58 The source is determined by the device tree. If ``refio-supply`` is present,
62 ---------------------------------
64 This family supports 2 types of oversampling: normal average and rolling
65 average. Only normal average is supported by the driver, as rolling average can
69 When the on-chip oversampling function is enabled the performance of the ADC can
77 Since the resolution boost feature causes 16-bit chips to now have 18-bit data
83 .. code-block:: bash
87 Channel selection and sequencer (single-end chips only)
88 -------------------------------------------------------
90 Single-ended chips of this family (ad7386/7/8(-4)) have a 2:1 multiplexer in
96 export 4 channels and ad7386-4/7-4/8-4 export 8 channels.
99 0-1 or 0-3) and inputs ``AinX1`` correspond to second half (i.e 2-3 or 4-7).
102 .. code-block::
105 	         |         +----------------------------
108 	voltage0 | AinA0 --|--->|     |      |      |
109 	         |         |    | mux |----->| ADCA |---
110 	voltage2 | AinA1 --|--->|     |      |      |
114 	voltage1 | AinB0 --|--->|     |      |      |
115 	         |         |    | mux |----->| ADCB |---
116 	voltage3 | AinB1 --|--->|     |      |      |
119 	         |         +----------------------------
125 ----------------------
127 - 2/4 SDO lines
128 - Rolling average oversampling
129 - Power down mode
130 - CRC indication
131 - Alert