This page (revision-14) was last changed on 2020-01-20 09:52 by Murray Altheim

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Page References

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Ads 1015 Analog Digital Converter
Ads1015AnalogDigitalConverter

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[{Image src='attach/Ads1015AnalogDigitalConverter/ads1015-chip.jpg' caption='ADS1015 Integrated Circuit (enlarged 20x; actual size: 2 x 1.5mm)' align='left' class='imgFloatLeft'}]
The ADS1015 is a +/- 24V Analog Digital Converter implemented by Pimoroni as a Breakout Garden board,
i.e., an [I2C] compatible breakout board. TIt has three channels that can read voltages from -24V to
+24V at sampling rates up to 3.3KHz with 12-bit resolution.
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The Texas Instruments __ADS1015 +/-24V Analog Digital Converter__ is a 2 x 1.5mm integrated circuit implemented by both AdaFruit and Pimoroni as [I2C]-compatible breakout boards (Pimoroni's is a "Breakout Garden" board). It can be used to measure analog voltage sources between -24V DC to +24V DC at sampling rates up to 3.3kHz, returning a value with 12 bit precision.
The ADS1015 has four channels (labeled {{{A0}}}, {{{A1}}}, {{{A2}}} and {{{A3}}}). The Pimoroni board only provides three of these channels as usable pins.
[{Image src='attach/Ads1015AnalogDigitalConverter/ads1015-thumb.jpg' link='attach/Ads1015AnalogDigitalConverter/ads1015.jpg' caption='ADS1015 Breakout Boards (click to enlarge)' align='right' class='imgFloatRight'}]
The thumbnail image to the right is roughly the size of the Adafruit and Pimoroni boards, which measure 28 x 17mm and 24 x 21mm respectively.
As of January 2020 the price of the AdaFruit board is US$9 (~NZ$14), also available from DigiKey NZ at NZ$16.57 (where shipping is free if you order over NZ$66). The price of the Pimoroni board is £12 (~NZ$24).
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[{Image src='attach/Ads1015AnalogDigitalConverter/ads1015-diagram.png' caption='ADS1015 Block Diagram' align='right' class='imgFloatRight'}]
* 12-bit precision (Adafruit also sell a 16-bit version, see [ADS1115|https://www.adafruit.com/product/1085])
* 12-bit precision
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* the TI ADS1015 has four channels: AdaFruit's provides all four, whereas Pimoroni's board only provides connections to three of them
* programmable gain (please consult the [ADS1015 TI datasheet|http://www.ti.com/lit/ds/symlink/ads1015.pdf] for details; the default is set at ±2.048V)
* pp to 3.3KHz sampling rate
* [I2C] interface: the Pimoroni board uses address 0x48 or 0x49 with a cut trace; the Adafruit board can be programmed for up to 4 different addresses)
* Three channels
* Programmable gain
* Up to 3.3KHz sampling rate
* I2C interface (address 0x48/0x49 (cut trace))
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* reverse polarity protection
* Reverse polarity protection
* Compatible with all models of Raspberry Pi, and Arduino
* [ads1015-python library | https://github.com/pimoroni/ads1015-python] on github
* ADS1015 ADC ([original TI datasheet|http://www.ti.com/lit/ds/symlink/ads1015.pdf])
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Both boards are compatible with all models of Raspberry Pi and Arduino, depending on which software libraries
you intend to use.
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The Adafruit board has its own installation page (which we won't repeat here, see ''[References|https://service.robots.org.nz/wiki/Edit.jsp?page=Ads1015AnalogDigitalConverter#section-Ads1015AnalogDigitalConverter-References]'' below).
You'll need [Python] and {{{pip}}} (or {{{pip3}}} for Python 3) already installed.
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For the Pimoroni board, [Python] and {{{pip}}} (or {{{pip3}}} for Python 3) must be installed.
Then, if you're using Python 2, just run:
If you're using Python 2, just run:
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or for Python 3:
For Python 3, use:
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* [ADS1015 12-Bit ADC - 4 Channel with Programmable Gain Amplifier|https://www.adafruit.com/product/1083] Adafruit product page
** [Adafruit 4-Channel ADC Breakouts: A guide to the ADS1115 and ADS1015 analog converters|https://learn.adafruit.com/adafruit-4-channel-adc-breakouts/]
* [ADS1015 +/-24V ADC breakout|https://shop.pimoroni.com/products/ads1015-adc-breakout] Pimoroni product page
** [ads1015-python library | https://github.com/pimoroni/ads1015-python] on github
* [Adafruit ADS1015|https://www.digikey.co.nz/catalog/en/partgroup/ads1015-12-bit-adc-4-channel-with-programmable-gain-amplifier/49471] product page on DigiKey
* [ADS101x Ultra-Small, Low-Power, I2C-Compatible, 3.3-kSPS, 12-Bit ADCs With Internal Reference, Oscillator, and Programmable Comparator|http://www.ti.com/lit/ds/symlink/ads1015.pdf] datasheet from Texas Instruments
* [!!! ADS1015 +/-24V ADC breakout|https://shop.pimoroni.com/products/ads1015-adc-breakout] product page
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This page (revision-14) was last changed on 2020-01-20 09:52 by Murray AltheimTop