1. Board overview
The board is a four-channel 250M frequency acquisition card, which can realize the conversion of four-channel high-speed analog data to the PCI-E bus. There are two high-performance AD chips (ADS42LB69) with 250M sampling frequency on board, the data output mode is LVDS (DDR) parallel mode, this backplane provides X8 PCI-E interface, the interface protocol adopts PCI-E2.0, and the maximum transmission rate can be 3GB/s.
This board can be widely used in signal acquisition, glitch detection, pulse detection and other fields in the field of radar and communication.
2. performance indicators
| Board function |
parameter |
content |
| ADC |
Chip model |
ADS42LB69 |
| Number of roads |
4 ADCs, |
| Sample rate |
30Msps-250Msps |
| Data bits |
16bit |
| Digital interfaces |
GDR LVDS |
| Analog interface |
AC coupling |
| Analog inputs |
±1V |
| connector |
6-way SMA |
| Input impedance |
50Ω |
| Simulated indicators |
SFDR：97dBFS at 170MHz FinS SNR = 74.9 dBFS at 170 MHz fINENOB = 12.03BITS，fIN = 170 MHz, 2.5 V p-p FSDNL = ±0.6 LSBINL = ±3.5 LSB |
| clock |
PLL chips |
AD9516-1 |
| On-board crystal oscillator |
10MHz 温补晶振VCXO |
| External input clock |
默认10MHz，3.3V LVTTL电平 |
| trigger |
Number of roads |
1 off-line input |
| Level |
5V input, opto-decoupled, TTL level, access to FPGA. |
| FPGA |
Model |
XC7K325T-FGG900I可升级为XC7K410T |
| External cache |
There are 8 DDR3 memories on board, each with 4Gbit chips, divided into two groups, each with a capacity of 2GB, using a 64-bit bus, which can use industrial-grade chips. DDR 3 can work stably at 1066MHz, and DDR3 read and write speeds can reach 6G-8GB/s. |
| Loading method |
QSPI Flash |
| Pcie |
V2.0 PCIeX8; |
| Software |
operating system |
Windows software driver, fixed Linux driver |
| function |
Trigger acquisition, continuous acquisition, hard disk storage, playback display |
| Board standard |
PCIe specification |
| Board size |
200.00mm*106.85mm/装配高度 = 38mm |
| Board weight |
(including heat sink) 1Kg |
| Power supply to the board |
+12V@2A;20W |
| Operating temperature |
Industrial -40℃到+85℃ |
3. Software Functions
Systematic indicators
The board provides supporting storage management software. AD data acquisition and storage software is a set of application software developed based on the computer PCI-E bus, the main purpose is to realize the data of the PCI-E data acquisition card, through the PCI-E bus storage to the memory, must ensure that the data is stored through the PCI-E bus without losing data. Around this main function, expand other accessibility functions. With this software, it is possible to store high-speed data, and the speed of data storage is greatly related to the performance of the computer and the performance of the memory (currently mainly SSD). It mainly depends on the following parameters: the main frequency of the CPU, the channel bandwidth of the memory, the bandwidth of the PCI-E bus, and the bandwidth of the high-speed SSD.
In general, the performance of this software is combined with the performance of the computer, which is mainly divided into three levels of performance: general speed storage products, 4GB/s; Medium-speed storage products, 8GB/s; Ultra-fast storage products are more than 10GB/s. The functions of this software mainly include: 4-channel data real-time storage, real-time acquisition and extraction display, and data playback and other functions.
For the convenience of users, we also provide users with dedicated storage workstations, which are easy to use.
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