This product qualifies for Free Surface Shipping !
B2B GST Credit Available
- Stock: 0 in Stock
- SKU: 08791
- Delivery Time
- Bulk & B2B RFQ
Adafruit ADS7128 8-Channel ADC and GPIO Expander - STEMMA QT / Qwiic
The Adafruit ADS7128 8-Channel ADC and GPIO Expander is a bit of a Platypus of the I2C expander world: hard to categorize as just an ADC or a GPIO expander since it combines the capabilities of both with great capabilites! Usually, you only get ADC or I/O so it's nice to see this combo product.
Featuring the aforementioned ADS7128, it can run on 3.3 or 5V logic and power, and all 8 I/O pins can individually configured to perform either 12-bit SAR analog input, push-pull or open drain digital output, or digital input. This makes it great as a general-purpose glue chip when you want to add more pins or analog/open-drain outputs to a microcontroller or microcomputer.
The ADS7128 also has a lot of fancy extras that make it a good ADC companion even if your main core already has analog inputs. It can run in standalone mode with zero-crossing detection or RMS computation. Not only can it count and track threshold crossings, but it also has an alert trigger output.
Unlike many ADC/expanders, it has two power supplies: the DVDD digital supply and AVDD analog supply are separate so you can use 3V logic for the digital I/O and I2C communications while the analog inputs and digital outputs can be as high as 5V. Or vice versa!
User Manual / Datasheet / Example Codes Etc.
Specifications
- channels configurable as any combination of:
- Up to 8 analog inputs, digital inputs, or digital outputs
- GPIOs for I/O expansion:
- Open-drain, push-pull digital outputs
- Analog watchdog:
- Programmable thresholds per channel
- Event counter for transient rejection
- Wide operating ranges:
- AVDD: 2.35 V to 5.5 V
- DVDD: 1.65 V to 5.5 V
- -40°C to +85°C temperature range
- CRC for read/write operations:
- CRC on data read/write
- CRC on power-up configuration
- I2C interface:
- Up to 3.4 MHz (high-speed mode)
- 8 configurable I2C addresses
- Programmable averaging filters
- Root-mean-square module:
- 16-bit true RMS output
- Programmable RMS time window
- Zero-crossing-detect module:
- ZCD output corresponding to any analog input
- Built-in transient rejection and hysteresis
- Digitally adjustable detection threshold
- Product Dimensions: 30.5mm x 17.8mm x 4.7mm / 1.2" x 0.7" x 0.2"
- Product Weight: 2.1g / 0.1oz
Package Includes
- 1x Adafruit ADS7128 8-Channel ADC and GPIO Expander - STEMMA QT / Qwiic
