[DigiKey "Smart Manufacturing, Non-stop Happiness" Creative Competition] - DAC output circuit board

lansebuluo

[DigiKey "Smart Manufacturing, Non-stop Happiness" Creative Competition] - DAC output circuit board [Copy link]

 

High-speed digital isolator circuit, used for isolation between MCU and analog quantity, mainly SPI interface isolation, uses one four-channel and one two-channel isolation chip.

There are two DACs on an AD5449 chip. The reference voltage is provided by ADR01 (10V) and ADR02 (5V), and the bipolar voltage output is formed through two op amp chips.

The analog end is powered by the external interface H1, which includes +12V, -12V, +3.3VA, and +3.3VD.

Analog voltage output port

The MCU end crystal oscillator uses a temperature compensated crystal oscillator to provide a stable clock.

The MCU uses STM32G473CBT6, 170MHz, which should be enough. In order not to waste the interface, all that can be guided are guided to the interface.

Storage chip, I bought AT34C04 before, but I couldn’t find it recently, so I made it compatible with AT24C16, which is used to save configuration parameters and should be enough.

Program download interface

Function pin interface, used to connect wifi module and HID interface board.

The final rendering has not been projected yet. This took me a week. After all, it is not my main business, so I will try to use finished products in the future.

秦天qintian0303

There is a different kind of fun in drawing your own board, but it is more expensive.

lansebuluo

Qintianqintian0303 posted on 2023-12-11 09:10 Drawing your own board is a different kind of fun, but it costs more materials

Yes, I am interested, otherwise I wouldn't bother myself, it's mainly a waste of time