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ADS1015 (I2C)
This device is a 12-bit A-D converter with 4 inputs.
The inputs can be used single ended or in certain differential combinations.
For configuration all possible combinations are mapped to 8 channels:
0: Voltage over AIN0 and AIN1.
1: Voltage over AIN0 and AIN3.
2: Voltage over AIN1 and AIN3.
3: Voltage over AIN2 and AIN3.
4: Voltage over AIN0 and GND.
5: Voltage over AIN1 and GND.
6: Voltage over AIN2 and GND.
7: Voltage over AIN3 and GND.
Each channel can be configured individually:
- pga is the programmable gain amplifier (values are full scale)
0: +/- 6.144 V
1: +/- 4.096 V
2: +/- 2.048 V (default)
3: +/- 1.024 V
4: +/- 0.512 V
5: +/- 0.256 V
- data_rate in samples per second
0: 128
1: 250
2: 490
3: 920
4: 1600 (default)
5: 2400
6: 3300
1) The /ads1015 node
Required properties:
- compatible : must be "ti,ads1015"
- reg : I2C bus address of the device
- #address-cells : must be <1>
- #size-cells : must be <0>
The node contains child nodes for each channel that the platform uses.
Example ADS1015 node:
ads1015@49 {
compatible = "ti,ads1015";
reg = <0x49>;
#address-cells = <1>;
#size-cells = <0>;
[ child node definitions... ]
}
2) channel nodes
Required properties:
- reg : the channel number
Optional properties:
- ti,gain : the programmable gain amplifier setting
- ti,datarate : the converter data rate
Example ADS1015 channel node:
channel@4 {
reg = <4>;
ti,gain = <3>;
ti,datarate = <5>;
};
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