TM7705 / AD7705 Dual-Channel 16-bit ADC Module with SPI
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Prices updated: 13 Oct 2026
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About this product
Dual-channel 16-bit analog-to-digital converter module built around the TM7705, which the listing describes as fully compatible with the AD7705. It communicates over SPI and includes a programmable gain amplifier from 1 to 128, suited to reading low-level sensor signals in measurement projects.
Specifications
- ADC resolution
- 16-bit
- Channels
- 2 (dual channel)
- Interface
- SPI
- Supply voltage
- 3.3V or 5.0V
- Programmable gain
- 1 to 128
- Voltage reference
- LM285-2.5 (external)
Frequently asked questions
How do I wire it to an Arduino?
Connect the SPI pins (SCK, MOSI, MISO) and a chip-select pin, then power the module at 3.3V or 5V with GND, matching the voltage to your board.
How can I change the gain range?
The gain is set in software through the programmable gain amplifier. The listing also notes that the input divider resistors and RC filter can be changed to suit other input ranges.
