ADS1220 24-bit Precision ADC (ESP32)

What you'll build

Step up from the noisy internal ADC to a real precision instrument: the 24-bit ADS1220 SPI ADC, able to resolve microvolt-level signals. You'll learn the layout discipline that makes high-resolution measurement actually work: a clean low-noise voltage reference and a carefully separated analog ground. It's the first step toward reading biopotentials like ECG, and eventually EEG.

It sits on the SENSE track: reading real-world signals and turning voltages, currents, and biopotentials into clean digital data.

The build pipeline

No steps skipped, no black boxes. Each stage is gated on real proof of work: a clean ERC, valid gerbers, a passing bring-up. You finish having actually done the engineering, not just watched it.

1. 01REQUIREMENTS
2. 02BOM SOURCING
3. 03SCHEMATIC
4. 04LAYOUT
5. 05DRC + GERBER
6. 06ORDERING
7. 07ASSEMBLY
8. 08BRING-UP
9. 09REVISION

Builds on

• ESP32-S3 USB-C Breakout Board→

Part of these builds

Questions

When does this course open?

It's in active production. Join the waitlist and we'll email you the moment it goes live, and the demand signal helps us decide what to build next.

Is it beginner-friendly?

This is an intermediate L2 subsystem that builds on the foundations. Every stage is explained from first principles, so you can follow along as long as you're comfortable reading a schematic.

What will I need to build it?

The course overview will preview for free; the full course is a one-time purchase (no subscription). Building the board for real also needs its bill of materials (listed in the course) and a small PCB order from a fab house. The course walks you through both.

What will I actually learn?

You'll learn reading real-world signals and turning voltages, currents, and biopotentials into clean digital data, plus the full board workflow: schematic capture, layout, DRC, gerber export, ordering, assembly, and bring-up.