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PLL2 is not locking

Category: Hardware
Product Number: AD9523-1

Hello,

I am working on AD9523-1 customized board. in this new board, I'm having issue i.e. PLL2 is not getting locked. inputs that we are providing are REF A is 100 MHz, REF B is 10 MHz and VCXO input is 100 MHz. and the responses I'm getting are

at 0x22C - 0xE9, at 0x22D - 0x04, at 0x230 - 0x00, at 0x231 - 0x01, at 0x232 - 0x0D. and register map file giving to AD9523 is as follows:

"AD9523 Regmap File"
"Rev.","1.0"
""
"Addr(Hex)","Value(Bin)","Value(Hex)"
"0000","10000001","81"
"0002","00000000","00"
"0003","00000000","00"
"0004","00000000","00"
"0005","00000000","00"
"0006","00000000","00"
"0010","00000001","01"
"0011","00000000","00"
"0012","00000100","04"
"0013","00000000","00"
"0014","00000001","01"
"0015","00000000","00"
"0016","00101000","28"
"0017","00000000","00"
"0018","00001100","0C"
"0019","00011111","1F"
"001A","00010010","12"
"001B","00010110","16"
"001C","10010000","90"
"001D","00000000","00"
"001E","00000000","00"
"001F","00000000","00"
"0020","00000000","00"
"00F0","00000111","07"
"00F1","10000111","87"
"00F2","00010011","13"
"00F3","00000010","02"
"00F4","01000000","40"
"00F5","00000000","00"
"00F6","00000000","00"
"00F7","00000001","01"
"00F8","00000000","00"
"00F9","00000000","00"
"00FA","00000000","00"
"0190","01110011","73"
"0191","00001001","09"
"0192","00000100","04"
"0193","00100000","20"
"0194","00011111","1F"
"0195","00000100","04"
"0196","01001000","48"
"0197","01100011","63"
"0198","00000000","00"
"0199","01110110","76"
"019A","00011111","1F"
"019B","00000100","04"
"019C","01001000","48"
"019D","01100011","63"
"019E","00000000","00"
"019F","00100000","20"
"01A0","00011111","1F"
"01A1","00000100","04"
"01A2","00100000","20"
"01A3","00011111","1F"
"01A4","00000100","04"
"01A5","00100000","20"
"01A6","00011111","1F"
"01A7","00000100","04"
"01A8","01100110","66"
"01A9","00001001","09"
"01AA","00000100","04"
"01AB","01001001","49"
"01AC","01100011","63"
"01AD","00000000","00"
"01AE","01001001","49"
"01AF","01100011","63"
"01B0","00000000","00"
"01B1","01101000","68"
"01B2","00001001","09"
"01B3","00000100","04"
"01B4","01101000","68"
"01B5","00001001","09"
"01B6","00000100","04"
"01B7","01010110","56"
"01B8","00001001","09"
"01B9","00000000","00"
"01BA","00000000","00"
"01BB","00000000","00"
"022C","00000000","00"
"022D","00000000","00"
"022E","00000000","00"
"022F","00000000","00"
"0230","00000000","00"
"0231","00000001","01"
"0232","00001101","0D"
"0233","00000000","00"
"0234","00000001","01"
"0A00","00000000","00"
"0A01","00000000","00"
"0A02","00000000","00"
"0A03","00000010","02"
"0A04","00000000","00"
"0A05","00000100","04"
"0A06","00001110","0E"
"0A07","00000000","00"
"0A08","00010000","10"
"0A09","00001110","0E"
"0A0A","00000000","00"
"0A0B","11110000","F0"
"0A0C","00101011","2B"
"0A0D","00000001","01"
"0A0E","10010000","90"
"0A0F","00000001","01"
"0A10","00000001","01"
"0A11","11100000","E0"
"0A12","00000011","03"
"0A13","00000010","02"
"0A14","00110000","30"
"0A15","10000000","80"
"0A16","11111111","FF"
"0B00","00000000","00"
"0B01","00000000","00"
"0B02","00000000","00"
"0B03","00000000","00"

kindly help me in resolving this issue.

Parents Reply
  • HI,

    if you want, you mat start a failure analysis process for this AD9523-1 that you moved from board 2 to board 1 and it continues to not work. Contact your ADI representative to initiate it.

    Could you please replace this AD9523-1 with others that you have and see if the board continues to not function?

    Petre

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