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1. Re: I2C 16 bit data transfers - PSOC3 or PSOC%
bob.marlowe Jan 30, 2013 5:04 PM (in response to philip.nielsen)The PSoC can send via I2C 16-bit data, but you will not find a 16-bit DAC in the PSoC world.
Bob
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2. Re: I2C 16 bit data transfers - PSOC3 or PSOC%
user_14586677 Jan 30, 2013 7:54 PM (in response to philip.nielsen)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.
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TI PWM DAC.pdf 2.8 MB
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3. Re: I2C 16 bit data transfers - PSOC3 or PSOC%
gautam.das.g Jan 31, 2013 10:57 PM (in response to philip.nielsen)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
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4. Re: I2C 16 bit data transfers - PSOC3 or PSOC%
philip.nielsen Feb 13, 2013 9:04 AM (in response to philip.nielsen)LTC2642