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Green rectangular circuit board with 40 pin header, black chips and silver screw terminals

WaveShare

WaveShare AD/DA Expansion 2 in 1 Accessory

SKU CH-S55F-W1KQ4

Adds 8-channel 24-bit ADC and 2-channel 16-bit DAC to Raspberry Pi and Jetson Nano via 40-pin GPIO

  • Add precise analog input with 8-channel 24-bit ADC at 30 ksps
  • Generate accurate analog output using dual 16-bit DAC channels
  • Connect sensors easily via pin-header interface matching WaveShare standard
  • Attach field wiring securely through screw-terminal blocks for analog or digital signals
  • Expand Raspberry Pi or Jetson Nano via 40-pin GPIO header

AD/DA Expansion for Raspberry Pi and Jetson Nano

The WaveShare AD/DA Expansion adds high-precision analog-to-digital and digital-to-analog conversion to Raspberry Pi series boards and Jetson Nano via the standard 40PIN GPIO header. It targets makers, engineers and students who need laboratory-grade signal acquisition and output for instrumentation, sensor networks or control projects.

Upgrade from basic GPIO analog workarounds

The onboard ADS1256 provides eight channels of 24-bit ADC with four differential inputs at 30 ksps, while the DAC8552 delivers two channels of 16-bit DAC output. This combination replaces software-only or low-resolution ADC methods when precision, channel count and differential measurement matter for scientific or industrial data logging.

Check pin-header and screw-terminal wiring before

The board exposes analog inputs through pinheaders matching the WaveShare sensor standard and provides screw terminals for both analog and digital signals with an AD/DA detect circuit for demonstration. Verify that your Raspberry Pi model or Jetson Nano has the full 40PIN header accessible and that your enclosure allows clearance for the terminal blocks.

Highlights

  • Add precise analog input with 8-channel 24-bit ADC at 30 ksps
  • Generate accurate analog output using dual 16-bit DAC channels
  • Connect sensors easily via pin-header interface matching WaveShare standard
  • Attach field wiring securely through screw-terminal blocks for analog or digital signals
  • Expand Raspberry Pi or Jetson Nano via 40-pin GPIO header

Specifications

No published specifications for this item yet.

Questions about this item

What GPIO header does the WaveShare AD/DA board use to sit on a Raspberry Pi?

It uses the standard 40PIN GPIO extension header, which matches every Raspberry Pi series board and the Jetson Nano.

Which step do people miss when wiring sensors to the onboard pinheaders?

They forget that the pinheaders follow the WaveShare sensor interface standard, so the sensor module must match that pinout or the signal lines will be crossed.

When will the ADS1256 ADC or DAC8552 DAC need replacement?

Only if the 24bit ADC or 16bit DAC is damaged by over-voltage; otherwise they are solid-state parts with no scheduled replacement.

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