ADC12DJ5200RF: No Data Output Even in Ramp/Test Pattern Mode

Tool/software:

Hi TI Team,

I’m working with the ADC12DJ5200RF on a custom board, interfaced with an FPGA using the JESD204 interface. The ADC has been configured via SPI, and I’m currently trying to validate the setup using the internal test pattern (Ramp mode).

However, I am not seeing any activity on the ADC JESD204B/C data lanes — even after enabling ramp mode via SPI.

Current Setup:

• ADC Mode: JMODE3 (16 lanes, JESD204B/C)

• Sampling Clock: 4.8 GHz (verified)

• REFCLK: 120 MHz (externally provided, verified with oscilloscope)

• SYSREF: Continuous mode, provided externally

• SPI Interface: Read/Write working correctly (Device ID 0xF0 read verified)

• FPGA JESD Core: Configured and waiting for link (no SYNC asserted, no CGS observed)

  Fullscreen HS_ADC_REGISTER 4.txt Download

  0x0000B0,
  0x000200,
  0x000303,
  0x000421,
  0x000500,
  0x000602,
  0x000C51,
  0x000D04,
  0x001000,
  0x020000,
  0x006100,
  0x002900,
  0x002A00,
  0x002B11,
  0x003000,
  0x0031A0,
  0x003200,
  0x0033A0,
  0x003800,
  0x003B00,
  0x004800,
  0x006001,
  0x006201,
  0x006400,
  // 0x006A00,
  0x006B00,
  0x006C01,
  0x006E88,
  0x007000,
  0x007100,
  0x007A00,
  0x007B00,
  0x007C00,
  0x007E00,
  0x007F00,
  0x009D01,
  0x016000,
  0x020103,
  0x02020F, 
  0x020301,
  0x020403,
  0x020500,
  0x020600,
  0x020700,
  0x020800,
  0x020900,
  0x020A00,
  0x020B00,
  0x020F00,
  0x021000,
  0x0211F2,
  0x0212AB,
  0x021307,
  0x021400,
  0x021500,
  0x021602,
  0x021700,
  0x021902,
  0x0220B4,
  0x022197,
  0x0222D0,
  0x02235E,
  0x022400,
  0x022800,
  0x022900,
  0x022A00,
  0x022BC0,
  0x022C00,
  0x023000,
  0x023100,
  0x023200,
  0x0233C0,
  0x023400,
  0x023500,
  0x023800,
  0x023900,
  0x023A00,
  0x023BC0,
  0x0240B4,
  0x024197,
  0x0242D0,
  0x02435E,
  0x024400,
  0x024500,
  0x024800,
  0x024900,
  0x024A00,
  0x024BC0,
  0x024C00,
  0x024D00,
  0x025000,
  0x025100,
  0x025200,
  0x0253C0,
  0x025400,
  0x025400,
  0x025500,
  0x025800,
  0x025900,
  0x025A00,
  0x025BC0,
  0x025C00,
  0x025D00,
  0x029700,
  0x02B000,
  0x02B105,
  0x02B200,
  0x02B500,
  0x02B600,
  0x02B700,
  0x02B800,
  0x02C000,
  0x02C11f,
  0x02C23f,
  0x02C400,
  0x031000,
  0x031300,
  0x031400,
  0x031500,
  0x031A00,
  0x031B00,
  0x034400,
  0x034600,
  0x034800,
  0x034A00,
  0x034C00,
  0x034E00,
  0x035000,
  0x035100,
  0x035200,
  0x035300,
  0x035400,
  0x035500,
  0x035600,
  0x035700,
  0x040000,
  0x041800,
  0x041A00,
  0x041C00,
  0x041E00,
  0x042000,
  0x042300,
  0x042500,
  0x042700,
  0x042900,
  0x044800,
  0x044A00,
  0x044C00,
  0x044E00,
  0x045000,
  0x045300,
  0x045500,
  0x045700,
  0x045900,
  0x006101,
  0x006C00,
  0x006C01,
  0x020001