DRV2667: Sawtooth shape on the output sine wave

Hi Zhang,

Can you share a scope capture of the sawtooth wave on the sine wave? Also can you share your I2C script?

Thank you,
Jeff McPherson

Hi Zhang,

zhang ce said:

I use I2C，control waveform generator enerate sine wave，but some santooth shape is on the sine wave. How to eliminate this sawtooth wave？

What is the frequency and amplitude of the sinewave? I would think the DAC output might have big steps (sawtooth) if the frequency is low and magnitude is high.

Brian

as follows:

usage example: setWave 0 0 0 128 19 2 0
$1 | --Mode: 0:Digital 1:Analog, Default 0
$2 | --Waveform: 0:Sin, Default:0
$3 | --Voltage Gain: 0:50 1:100 2:150 3:200, Default:0
$4 | --Amplitude:0:no-signal 128:half-scale 255:Full-scale, Default:128
$5 | --Frequency: 19:150hz 26:200hz 32:250hz 38:300hz, Default:19
$6 | --NumberOfCycles: 1,2...10, Default:2
$7 | --Rise/Fall Time: 0:No Envelope 1:32 2:64 3:96 4:128 5:160...15:2048, Default:0

zhang ce said:

as follows:

Hi,

The waveform is unipolar above 0v, and so it's not a sinewave. Is this a custom waveform that written into the memory?

Brian