Hence, ADCs are used to convert the analog to digital input to the microcontroller. It is done so because sensors give analog output whereas microcontrollers expect digital input. Connect a 100nF capacitor to GND and 5V.ĪDCs are used extensively where there’s input from sensors. Note: Connect the 10k potentiometer's ends to 5V and GND. For great precision, it has an inbuilt calibrated reference.Ĭonnections for interfacing ADS1115 Breakout Board with Arduino are given in below table:
The ADS1115 is a 16-bit precision ADC with four multiplexed inputs that can be used individually or in pairs for differential measurements. You can connect to Arduino, ESP8266, Raspberry Pi, etc.
#Analog to digital converter board how to
How to use ADS1115 Analog to Digital Converter ICĪDS1115 IC is mounted on an easy-to-use breakout board.
These RDY and alert signal can be used to interrupt the microcontroller. The ADS1115 also has a programmable digital comparator where the analog input is compared with reference voltage and accordingly gives the output as ready (RDY) or alert. The input is then transferred to 16-bit ADC and then to I2C interface block for connecting with the microcontroller through the pins: SDA, SCL, and ADDR. This range is (+ or -) 256 millivolt to (+ or -) 6.144 volts. PGA enables the ADS1115 to accept different ranges of inputs as discussed earlier. Note: Complete technical details about this IC can be found in the ADS1115 datasheet, given at the end of the page.Īs shown in the block diagram below, the IC accepts 4 analog inputs (A0, A1, A2, A3) they are given to the multiplexer whose output is fed to the Programmable Gain Amplifier (PGA). In the same product family: ADS1113, ADS1114, ADS1013, ADS1014, ADS1015ĪDC0804 : DIP-20 Package, 8-Bit Analog to Digital Converter ICĪDC0808 : DIP-28 Packaged, 8-Bit A/D Converter with 8-Channel Multiplexer ICĪDC0809 : 8-Bit A/D Converter with 8-Channel Multiplexer IC, DIP-28 Packageįew other ADCs are: HI7190IP, MC1408, ICL7135, MAX186, MCP3201, MCP3008, MCP3202, etc. Programmable Data Rate: 8 Samples per Second (SPS) to 860 SPS.Four single-ended inputs or two differential inputs.I2C interface: Four pin-selectable addresses.Low Current Consumption (in Continuous-Conversion mode): 150 μA.Supply Range: 2.0 V to 5.5 V (Minimum Analog voltage (AVDD) 2V, Maximum Input voltage: 5.5V).Operating Temperature Range: –40☌ to +125☌.
#Analog to digital converter board serial
Serial clock input: Clocks data on SDA (used for I2C communication) Serial data: Transmits and receives data (used for I2C communication) It also features PGA (Programmable Gain Amplifier), using which we can measure very low voltages like millivolts by programming the amplifier to multiply with a gain value so the measurement is accurate.ĭigital comparator output or conversion readyĭifferential channel 1: Single-ended channel 1 input or Negative inputĭifferential channel 1: Single-ended channel 2 input or Negative inputĭifferential channel 2: Single-ended channel 3 input or Positive inputĭifferential channel 2: Single-ended channel 4 input or Negative input Hence, ADS1115 can give a better resolution, which means, ADS1115 can give finer values and it can be more accurate. Let’s do a little comparison between Arduino and ADS1115 to understand how powerful ADS1115 ADC is Arduino has a 10-bit ADC which means it can hold a digital value of 0 to 1023 (because 2 10 is 1024) whereas the 16-bit ADS1115 can hold 2 16 which is 65536. Sometimes these built-in ADCs don’t suffice the need (they have lesser gain and poor resolution) hence ADS1115 type of compact ADC boards come in handy. A lot of microcontrollers (like the Arduino boards, ESP8266 boards) have built-in ADCs and it’s very essential because most sensors give analog output whereas microcontrollers need digital input. A programmable gain amplifier (PGA) and a digital comparator are also included in the ADS1115 SMD IC.ĪDS1115 is one of the most powerful and versatile Analog to Digital Converter (ADC). This IC is from Texas Instruments a low-drift voltage reference and an oscillator are included in the ADS1115 IC. In simple terms, the ADS1115 is a 16-bit ADC with four inputs that are multiplexed. ADS1115 IC is a 16-Bit ADC with Internal Reference, Oscillator, 860-SPS, and Programmable Comparator which is ultra-small, low-power, and I2C compatible.
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