I2C 16 bit data transfers - PSOC3 or PSOC%

The PSoC can send via I2C 16-bit data, but you will not find a 16-bit DAC in the PSoC world.

Bob

Of course you can get I2C external 16 bit DACs, or you could use PSOC 3/5,

16 bit PWM, to build a DAC. Its inherently montonic, requires a LP filter, usually

simple RC. Filter BW trades off settling time for ripple. Generally speaking this

approach is slower than a ladder DAC, but if you do not need speed its a great

way of getting hi res DAC.

If you need absolute accuracy run the PWM out thru a pin whose reference is

a known accurate value, or derive Vdd from a reference.

Attached an ap note on design considerations.

This approach cannot be used for audio. Or fast motor control.

Regards, Dana.

Hi pnielsen3,

It is possible to interface I2C based external DAC with PSoC 3 or PSoC 5. What is the part number of the DAC you planning to use?

Regards,

Gautam Das