ProtoCentral ADS1293 3-channel, 24-bit ECG Breakout Board (with cables and electrodes)

The ProtoCentral ADS1293 Breakout is a 3-channel, 24-bit ECG analog front-end built around the Texas Instruments ADS1293 — a low-power AFE designed for portable and wearable cardiac monitoring. It gives you a complete ECG signal chain on a small board you drive over SPI from an Arduino, ESP32, Raspberry Pi or any other microcontroller.

Two 3.5 mm jacks take the supplied snap-lead electrode cables, so you can be recording a real ECG trace within minutes of unboxing — no electrode wiring to solder, no instrumentation amplifier to design, no analog filter chain to get right.

New in revision v2

• Runs from 3.3 V or 5 V — supply and logic, with no jumpers to set. The v1 board needed solder jumpers to select logic level; v2 accepts either rail directly.
• Electrode assignments printed on the board. RA, LA, LL, RL, V1 and IN6 are silkscreened next to the jack pins they belong to.
• Four plated mounting holes on the corners, for enclosures and stacked assemblies.
• A SYNC pin and a CLK OUT/IN pad for running several boards from one clock, synchronised.
• One solder jumper instead of four — CONN selects whether the shared input goes to IN6 or to the Wilson Central Terminal.

Features

• Texas Instruments ADS1293 analog front-end
• Three simultaneously sampled, 24-bit ECG channels
• Fourth analog channel for pace-pulse detection
• 0.3 mW per channel
• On-chip right-leg drive amplifier and Wilson Central Terminal generation
• AC and DC lead-off detection
• Onboard 4.096 MHz crystal, or clock the board externally through the CLK pad
• Onboard level translators — safe to drive from 3.3 V or 5 V logic
• Two 3.5 mm jacks for the supplied electrode cables
• SPI interface

Pinout

Upgrading from v1? The v2 header is 10 pins and is not pin-compatible with the 12-pin v1 header. WCT and CLK are no longer brought out to the header, and a SYNC pin has been added. The Arduino library is unchanged — only your wiring is.

What’s in the box

• 1 × ADS1293 breakout board (v2)
• 2 × 3-lead snap electrode cables with 3.5 mm plugs
• 10 × disposable stick-on ECG electrodes
• 1 × 10-pin 0.1″ header strip, unsoldered