Adafruit
ADS7830 8-Channel 8-Bit I2C ADC Breakout
· MPN: ADA5836
This breakout adds eight analogue input channels over I2C, making it a handy way to read potentiometers, LDRs, flex sensors and other analogue or resistive s...
This breakout adds eight analogue input channels over I2C, making it a handy way to read potentiometers, LDRs, flex sensors and other analogue or resistive sensors from boards that need more ADC inputs. It’s especially useful with single-board computers such as Raspberry Pi, which don’t include built-in analogue inputs.
The ADS7830 is an 8-bit SAR analogue-to-digital converter with up to 8 multiplexed input channels, supporting single-ended inputs or pseudo-differential measurements on adjacent pins. It can run from 2.7V to 5.25V, with the board designed for 3V or 5V power and logic. Maximum sample rate is up to 70kSPS, although the highest speed requires 3.4MHz I2C support. Two address pins allow up to four boards on one bus for a total of 32 analogue channels.
The board uses the STEMMA QT form factor, with dual connectors compatible with SparkFun Qwiic for quick solderless I2C connections and easy daisy-chaining. A 0.1" header strip is also included for breadboard or perfboard use, and there are four mounting holes for installation in a project.
- Resolution: 8-bit
- Channels: 8
- Interface: I2C
- Input modes: single-ended or pseudo-differential
- Supply voltage: 2.7V to 5.25V
- Operating temperature: -40°C to 85°C
Jargon buster
Plain-language definitions for the technical terms used above.
- ADC
- An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
- ADS7830
- A specific 8-channel analogue-to-digital converter chip used to read analogue signals and send the results over I2C. The part number matters because it tells you the board’s resolution, channel count, input modes, and software support requirements.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- Qwiic
- Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
- SAR analogue-to-digital converter
- SAR stands for successive approximation register, a common ADC design that measures an analogue voltage by narrowing in on its digital value step by step. It matters because SAR ADCs are often a good fit for general sensor reading where you need moderate speed and simple, predictable measurements.
- STEMMA QT
- A small plug-in connector system for I2C boards that lets you connect compatible sensors and controllers without soldering. It matters because it can make wiring faster and less error-prone, especially when adding several small modules to a project.
Supplier page — adafruit.com
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ADS7830 Datasheet
Datasheet · 544.5 KB · Click any page to view full size
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