FMCP-ADC3P0 comes as an AC coupled differential (or single-ended, as a build option) ADC module, without any balun on the differential input path to provide maximum accuracy. It supplies four channels of ADC with 3GS/s each at 14bits by using 2 AD9208 ADC ICs (or AD9689BBPZ-2600 for 2.6GS/s) . ADC input is to interface with the JESD204B IP core. The full power bandwidth of this module is 5GHz. Trigger and external clock input connectors are available on the module. The trigger input allows the user to add a timestamp to the sample stream from ADC.
In this module, the ADC input is connected directly to the input differential signal, and the maximum input swing is 1.7V and 2.7V for the differential and single-ended, respectively.
Board clocking structure has been designed based on HMC7044, which provides the possibility of deterministic latency and subclass one synchronization between multiple ADCs.
The module uses 2 ADCs. This device is a JESD204B complaint. They can work at various sample rates, and there is a possibility to enable decimation for the ADC.
Board provides internal VCXO and TCXO clocks. In this case, clocks from HMC7044 go to ADC. This IC also provides the SYSREF clock with known and adjustable delays. According to JESD204B, this also provides REF CLK and SYSREF CLK for FPGA, to achieve the requirement of subclass 1 JESD204B.
The FPGA REF CLK can be used to clock the Rx path. Inside the FPGA transceivers, there are two PLLs. One QPLL – is shared for four transceivers (called quad)- and CPLL one for each transceiver.
- FMC+, Vita 57.4 compliant, form factor, HPC
- Conduction cooled
- 4 channels of ADC at 3GS/as 14 bits, using 2 AD9208 ICs (or AD9689BBPZ-2600 for 2.6GS/s)
- flexible clocking
- trigger and external clock inputs
- supported by JESD204C class 1 supported by using HMC7044 clock IC
ADC parameters from ADI datasheet:
- 14-Bit Resolution, Dual-Chanel, 3000MSPS ADC;
- -3 dB bandwidth – 9GHz;
- Full power bandwidth – 5GHz;
- INL: ±6 LSB (Ta = 25);
- DNL: ±0.4 LSB (Ta = 25);
- NF: 24.5 dB;
- Spectral Performance (fIN = 255 MHz at –2 dBFS):
- SNR: 60.2 dBFS
- NSD: –152 dBFS/Hz
- SFDR: 71 dBFS
- ENOB: 9.6 Bits
- Spectral Performance (fIN = 3950 MHz at –2 dBFS):
- SNR: 55.1 dBFS
- SFDR: 58 dBFS
- ENOB: 8.5 Bits
- Input Full-Scale differential: from 1.13 to 2.04 VPP(software selectable). 1.7V default.
- Input type: Differential (single-ended – option), AC coupled
- Input impedance: 200 Ohm(differential)
- Maximum input voltage range for AC coupled input: 2 Vpp (differential).
Trigger input :
- Input type: DC – coupled, single-ended, 3.3V logic, ESD protected;
- Input impedance : >100 kOhm;
- Frequency range: DC – 10 MHz;
- Maximum input voltage – 6V;
- Logic “0” voltage <0.8V;
- Triggering voltage >2V.
Estimated total Board Power Dissipation: 20W max.
- Defense and Aerospace
- Diversity multiband, multimode digital receivers
- 3G/4G, TD-SCDMA, W-CDMA, GSM, LTE, LTE-A
- Electronic test and measurement systems
- Phased array radar and electronic warfare
- DOCSIS 3.0 CMTS upstream receive paths
- HFC digital reverse path receivers
A complete Vivado project showing the capture of ADC signals by using the Xilinx JESD204B IP core with sample data sent to host via carrier card PCIe interface.
Where xx=SE means the input are Single Ended and blank means differential input.