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- /**
- * Example for Arduino Library for Texas Instruments ADS1118 - 16-Bit Analog-to-Digital Converter with
- * Internal Reference and Temperature Sensor
- *
- * @author Alvaro Salazar <alvaro@denkitronik.com>
- * http://www.denkitronik.com
- *
- */
- #include "ADS1118.h"
- #include <SPI.h>
- //Definition of the Arduino pin to be used as the chip select pin (SPI CS pin). Example: pin 5
- #define CS 5
- //Creating an ADS1118 object (object's name is ads1118)
- ADS1118 ads1118(CS);
- void setup(){
- Serial.begin(115200);
- ads1118.begin(); //Initialize the ADS1118. Default setting: PULLUP RESISTOR, ADC MODE, RATE 8SPS, SINGLE SHOT, ±0.256V, DIFFERENTIAL AIN0-AIN1
- /*
- * EXAMPLES:
- * The lines above in this method are needed only if you want to change the default setting. Use them to fit your needs
- * If you need to take care of noise and the ENOB (Effective Number of Bits) see the tables at the end of this file
- */
- /* Changing the sampling rate.
- Available values: RATE_8SPS, RATE_16SPS, RATE_32SPS, RATE_64SPS, RATE_128SPS, RATE_250SPS, RATE_475SPS, RATE_860SPS */
- ads1118.setSamplingRate(ads1118.RATE_8SPS); //Using the setter method to change the sampling rate
- //ads1118.configRegister.bits.rate=ads1118.RATE_8SPS; //Driving the config register directly. Uncomment if you want to use this way
- /* Changing the input selected.
- Available values: Diferential inputs: DIFF_0_1, DIFF_0_3, DIFF_1_3, DIFF_2_3.
- Single ended input: AIN_0, AIN_1, AIN_2, AIN_3*/
- ads1118.setInputSelected(ads1118.DIFF_0_1); //Using the setter method to change the input selected
- //ads1118.configRegister.bits.mux=ads1118.DIFF_0_1; //Driving the config register directly. Uncomment if you want to use this way
- /* Changing the full scale range.
- Available values: FSR_6144 (±6.144V)*, FSR_4096(±4.096V)*, FSR_2048(±2.048V), FSR_1024(±1.024V), FSR_0512(±0.512V), FSR_0256(±0.256V).
- (*) No more than VDD + 0.3 V must be applied to this device. */
- ads1118.setFullScaleRange(ads1118.FSR_0256); //Using the setter method to change the full scale range
- //ads1118.configRegister.bits.pga=ads1118.FSR_0256; //Driving the config register directly. Uncomment if you want to use this way
-
- /* Setting to continuous conversion mode */
- ads1118.setContinuousMode(); //Using the setter method to set it to continuous mode
- //ads1118.configRegister.bits.operatingMode=CONTINUOUS; //Driving the config register directly. Uncomment if you want to use this way
- /* Setting to single shot conversion mode */
- ads1118.setSingleShotMode(); //Using the setter method to set it to "single shot conversion and power down" mode
- //ads1118.configRegister.bits.operatingMode=SINGLE_SHOT;//Driving the config register directly. Uncomment if you want to use this way
- /* Disabling the pull-up resistor */
- ads1118.disablePullup(); //Using the setter method to disable the pull-up resistor in Dout
- //ads1118.configRegister.bits.pullUp=PULLUP; //Driving the config register directly. Uncomment if you want to use this way
- /* Enabling the pull-up resistor */
- ads1118.enablePullup(); //Using the setter method to enable the pull-up resistor in Dout
- //ads1118.configRegister.bits.pullUp=NO_PULLUP; //Driving the config register directly. Uncomment if you want to use this way
- }
- void loop(){
- Serial.println(String(ads1118.getTemperature(),6)+" C"); //Getting temperature
- Serial.println(String(ads1118.getMilliVolts(),10)+"mV"); //Getting millivolts measured in the input selected
-
- //Serial.println(String(ads1118.getMilliVolts(ads1118.DIFF_0_1),10)+"mV"); //Specifying the input to be selected
-
- delay(200); //You can use a delay to save power. The ADS1118 will be in power down state during all the delay time. Optional
-
- }
- /*
- Table 1. Noise in μVRMS (μVPP) at VDD = 3.3 V [1]
- DATA RATE FSR (Full-Scale Range)
- (SPS) ±6.144 V ±4.096 V ±2.048 V ±1.024 V ±0.512 V ±0.256 V
- 8 187.5 (187.5) 125 (125) 62.5 (62.5) 31.25 (31.25) 15.62 (15.62) 7.81 (7.81)
- 16 187.5 (187.5) 125 (125) 62.5 (62.5) 31.25 (31.25) 15.62 (15.62) 7.81 (7.81)
- 32 187.5 (187.5) 125 (125) 62.5 (62.5) 31.25 (31.25) 15.62 (15.62) 7.81 (7.81)
- 64 187.5 (187.5) 125 (125) 62.5 (62.5) 31.25 (31.25) 15.62 (15.62) 7.81 (7.81)
- 128 187.5 (187.5) 125 (125) 62.5 (62.5) 31.25 (31.25) 15.62 (15.62) 7.81 (12.35)
- 250 187.5 (252.09) 125 (148.28) 62.5 (84.03) 31.25 (39.54) 15.62 (16.06) 7.81 (18.53)
- 475 187.5 (266.92) 125 (227.38) 62.5 (79.08) 31.25 (56.84) 15.62 (32.13) 7.81 (25.95)
- 860 187.5 (430.06) 125 (266.93) 62.5 (118.63) 31.25 (64.26) 15.62 (40.78) 7.81 (35.83)
-
- Table 2. ENOB from RMS Noise (Noise-Free Bits from Peak-to-Peak Noise) at VDD = 3.3 V
- DATA RATE FSR (Full-Scale Range)
- (SPS) ±6.144 V ±4.096 V ±2.048 V ±1.024 V ±0.512 V ±0.256 V
- 8 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16)
- 16 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16)
- 32 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16)
- 64 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (16)
- 128 16 (16) 16 (16) 16 (16) 16 (16) 16 (16) 16 (15.33)
- 250 16 (15.57) 16 (15.75) 16 (15.57) 16 (15.66) 16 (15.96) 16 (14.75)
- 475 16 (15.49) 16 (15.13) 16 (15.66) 16 (15.13) 16 (14.95) 16 (14.26)
- 860 16 (14.8) 16 (14.9) 16 (15.07) 16 (14.95) 16 (14.61) 16 (13.8)
-
-
- [1] Texas Instruments, "ADS1118 Ultrasmall, Low-Power, SPI™-Compatible, 16-Bit Analog-to-Digital
- Converter with Internal Reference and Temperature Sensor", ADS1118 datasheet, SBAS457E [OCTOBER 2010–REVISED OCTOBER 2015].
-
- Note: This information is taken from http://www.ti.com
- Copyright © 2010–2015, Texas Instruments Incorporated
- */
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