1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/iio/dac/adi,ltc2672.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Analog Devices LTC2672 DAC
8
9 maintainers:
10 - Michael Hennerich <michael.hennerich@analog.com>
11 - Kim Seer Paller <kimseer.paller@analog.com>
12
13 description: |
14 Analog Devices LTC2672 5 channel, 12-/16-Bit, 300mA DAC
15 https://www.analog.com/media/en/technical-documentation/data-sheets/ltc2672.pdf
16
17 properties:
18 compatible:
19 enum:
20 - adi,ltc2672
21
22 reg:
23 maxItems: 1
24
25 spi-max-frequency:
26 maximum: 50000000
27
28 vcc-supply:
29 description: Analog Supply Voltage Input.
30
31 v-neg-supply:
32 description: Negative Supply Voltage Input.
33
34 vdd0-supply:
35 description: Positive Supply Voltage Input for DAC OUT0.
36
37 vdd1-supply:
38 description: Positive Supply Voltage Input for DAC OUT1.
39
40 vdd2-supply:
41 description: Positive Supply Voltage Input for DAC OUT2.
42
43 vdd3-supply:
44 description: Positive Supply Voltage Input for DAC OUT3.
45
46 vdd4-supply:
47 description: Positive Supply Voltage Input for DAC OUT4.
48
49 iovcc-supply:
50 description: Digital Input/Output Supply Voltage.
51
52 ref-supply:
53 description:
54 Reference Input/Output. The voltage at the REF pin sets the full-scale
55 range of all channels. If not provided the internal reference is used and
56 also provided on the VREF pin.
57
58 reset-gpios:
59 description:
60 Active Low Asynchronous Clear Input. A logic low at this level triggered
61 input clears the device to the default reset code and output range, which
62 is zero-scale with the outputs off. The control registers are cleared to
63 zero.
64 maxItems: 1
65
66 adi,rfsadj-ohms:
67 description:
68 If FSADJ is tied to VCC, an internal RFSADJ (20 kΩ) is selected, which
69 results in nominal output ranges. When an external resistor of 19 kΩ to
70 41 kΩ can be used instead by connecting the resistor between FSADJ and GND
71 it controls the scaling of the ranges, and the internal resistor is
72 automatically disconnected.
73 minimum: 19000
74 maximum: 41000
75 default: 20000
76
77 io-channels:
78 description:
79 ADC channel to monitor voltages and currents at the MUX pin.
80 maxItems: 1
81
82 '#address-cells':
83 const: 1
84
85 '#size-cells':
86 const: 0
87
88 patternProperties:
89 "^channel@[0-4]$":
90 $ref: dac.yaml
91 type: object
92 additionalProperties: false
93
94 properties:
95 reg:
96 description: The channel number representing the DAC output channel.
97 maximum: 4
98
99 adi,toggle-mode:
100 description:
101 Set the channel as a toggle enabled channel. Toggle operation enables
102 fast switching of a DAC output between two different DAC codes without
103 any SPI transaction.
104 type: boolean
105
106 output-range-microamp:
107 items:
108 - const: 0
109 - enum: [3125000, 6250000, 12500000, 25000000, 50000000, 100000000,
110 200000000, 300000000]
111
112 required:
113 - reg
114 - output-range-microamp
115
116 required:
117 - compatible
118 - reg
119 - spi-max-frequency
120 - vcc-supply
121 - iovcc-supply
122 - v-neg-supply
123
124 allOf:
125 - $ref: /schemas/spi/spi-peripheral-props.yaml#
126
127 additionalProperties: false
128
129 examples:
130 - |
131 spi {
132 #address-cells = <1>;
133 #size-cells = <0>;
134 dac@0 {
135 compatible = "adi,ltc2672";
136 reg = <0>;
137 spi-max-frequency = <10000000>;
138
139 vcc-supply = <&vcc>;
140 iovcc-supply = <&vcc>;
141 ref-supply = <&vref>;
142 v-neg-supply = <&vneg>;
143
144 io-channels = <&adc 0>;
145
146 #address-cells = <1>;
147 #size-cells = <0>;
148 channel@0 {
149 reg = <0>;
150 adi,toggle-mode;
151 output-range-microamp = <0 3125000>;
152 };
153
154 channel@1 {
155 reg = <1>;
156 output-range-microamp = <0 6250000>;
157 };
158 };
159 };
160 ...
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