Product description
24-bit ADC with four channels based on the ADS1219. A high-resolution analog-to-digital converter for applications where small signal variations need to be measured accurately. The board communicates via I²C and can be connected using Qwiic or header pins. All signals are broken out to 2.54 mm pitch pins for use on a breadboard.
The ADS1219 offers up to 24-bit resolution (approximately 20 bits effective) and can be configured with four single-ended inputs or as two differential channels. The integrated amplifier with selectable gain makes it possible to measure very small voltage changes. Both an internal 2.048 V reference and an external reference are supported for flexible system design.
The board supports multiple operating modes such as single-shot, continuous conversion, and power-down, and includes built-in filtering to reduce interference from 50 Hz and 60 Hz mains noise. With up to sixteen selectable I²C addresses, multiple devices can be used on the same bus to scale the number of measurement channels.
Specifications:
- Resolution: 24 bit (max), approximately 20 bits effective
- Number of channels: 4 single-ended or 1–2 differential
- Interface: I²C via Qwiic or header pins
- Supply voltage: 2.3 to 5.5 V (3.3 V via Qwiic)
- Sample rate: 20 Hz to 1 kHz
- Gain: PGA x1 or x4
- Reference: Internal 2.048 V or external via REFP/REFN
- Current consumption (typical): 8 µA to 410 µA
- I²C addresses: 0x40 (default) to 0x4F, 16 selectable (via solder jumper)
- Operating modes: Single-shot, continuous, power-down
- Connections: Two Qwiic connectors and breakout pins
- Operating temperature range: -40 to 125 °C