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DAC3482EVM: The output of DAC3482 with different input signal

Part Number: DAC3482EVM
Other Parts Discussed in Thread: TIDA-00069, ADS4249EVM, DAC3482

Hi Ti,

I have the problem about the DAC3482EVM output.

My project is using ADS4249EVM, TSW1400evm and DAC3482EVM.I give the 200kHz sine wave and 20MHz CLK to ADC4249EVM. And using HSDC Pro to download the firmware(TIDA-00069). and the DAC 3482EVM config file is.

   x00	   xD208
   x01	   x0000
   x02	   x8012
   x03	   xA001
   x04	   xFFFF
   x05	   x8660
   x06	   x2B00
   x07	   xFFFF
   x08	   x0000
   x09	   x8000
   x0A	   x0000
   x0B	   x0000
   x0C	   x05A6
   x0D	   x05A6
   x0E	   x05A6
   x0F	   x05A6
   x10	   x3000
   x11	   x0000
   x12	   x0000
   x13	   x0000
   x14	   xB94F
   x15	   x3FFC
   x16	   xDE5E
   x17	   x4CC8
   x18	   x205F
   x19	   x10F4
   x1A	   x4820
   x1B	   x0800
   x1C	   x0000
   x1D	   x0000
   x1E	   x1188
   x1F	   x8882
   x20	   x2400
   x22	   x1B1B
   x23	   x001F
   x24	   x1000
   x25	   x7A7A
   x26	   xB6B6
   x27	   xEAEA
   x28	   x4545
   x29	   x1A1A
   x2A	   x1616
   x2B	   xAAAA
   x2C	   xC6C6
   x2D	   x0000
   x2E	   x0000
   x2F	   x0000
   x30	   x61A8
   x7F	   x0004
CDCE62005 Registers
Freq:19.200000MHz
Address	Data
00		80400000
01		811C0321
02		81400302
03		810C0303
04		00040304
05		38101A85
06		04BF1F66
07		151877F7
08		20001808

And i can get the clear sinewave in the digital Oscillosocpe, but when I change the input sinewave to Squarewave or Rampwave, the output in the oscilloscope is not right.

can you tell me why?

Sifei