PX14400D – 400 MS/s, 14 bit, DC Coupled, 2 Channel, Xilinx Virtex-5 FPGA, PCIe x8, High Speed Digitizer Board

The PX14400D is a dual channel DC-coupled waveform capture board that can acquire up to 400 MS/s on each channel with 14-bit resolution. (For AC-coupled requirements, refer to PX14400A product model.) The PX14400D analog front end has a signal frequency capture range of DC to 200 MHz with 3-pole Bessel filters on each input channel.

The PX14400D has two software selectable input voltage ranges of 400mV and 1.2V peak-to-peak. Optional inline SMA attenuators are available for changing these levels if needed; for example, the use of 6 dB attenuators effectively change the input levels to 800mV and 2.4V peak-to-peak. Alternatively, please refer to the separate product model that provides six software selectable input ranges of 200mV, 333mV, 600mV, 1V, 1.6V, and 3V with various bandwidth specifications at each of these input ranges.

A frequency synthesized clock allows the ADC sampling rate to be set to virtually any value from 20 MHz to 400 MHz (except for an un-settable range of 277 MHz to 308 MHz), offering maximum flexibility for sampling rate selection. This frequency selection flexibility comes at no cost to the acquisition clock quality/performance when locked to either the onboard 10 MHz, ±5 PPM reference clock or to an externally provided 10 MHz reference clock. The ADC may also be clocked from an external clock source.

The PX14400D has a primary sample-data RAM bank of 512 MB memory for onboard sample data storage. Alternatively, PCIe Buffered Acquisition mode utilizes the onboard RAM as a FIFO to provide non-stop continuous acquisition and streaming of sample data to the host PC via the PCIe interface. With PCIe Buffered Acquisition mode, the PX14400D can sustain up to a maximum 1.4 GB/s data streaming rate over its PCIe Gen1 x8 interface to the host PC for real-time high-speed processing and/or data recordings.

The PX14400D also provides an option for an onboard secondary Xilinx Virtex-5 SX50T or SX95T FPGA with its own 512 MB RAM bank for dedicated embedded signal processing. FPGA processing models of the PX14400D include DDC, FFT, and FIR Filter features standard. The processing FPGA is fully end user programmable, allowing for custom developed embedded processing routines.

Up to five PX14400D digitizers can be setup for synchronous acquisition operations for a total of 10 input channels by utilizing the separate Signatec SYNC1500 clock/trigger driver source card.

A Windows oscilloscope program, the PX14400 Scope App, allows the operator to view/edit all digitizer hardware settings as well as record and display acquisition data. It is included along with a full complete C SDK for custom application development.

Product Specifications

Product: PX14400D (DC-Coupled) Full Data Sheet
Update: Revision 1.3 - 08/24/2015
File Size: 698 KB

External Signal Connections
     Analog Input, Channel 1: SMA
     Analog Input, Channel 2: SMA
     Clock Input: SMA
     Trigger Input: SMA
     Digital Input / Output: SMA
Analog Inputs
     Full Scale Voltage Ranges: 400mV and 1.2V peak-to-peak
     Impedance: 50 ohms
     Bandwidth: DC - 200 MHz (Bessel filter)
     Coupling: DC
     SNR (1-200 MHz): 67 dB
     SFDR (@ 25 MHz): 80 dB
     SFDR (@ 100 MHz): 73 dB
External Trigger
     Signal Type: digital, LVCMOS signal level
     Impedance: >10k ohms
     Bandwidth: 50 MHz
Internal Synthesized Clock
     Frequency Range: 20 MHz to 400 MHz
     Unsettable Ranges: 277 MHz to 308 MHz
     Resolution: better than ±10 PPM
     Accuracy: better than ±5 PPM
External Clock
     Signal Type: sine wave or square wave
     Coupling: AC
     Impedance: 50 ohms
     Frequency: 20 MHz to 400 MHz
     Amplitude: 100mV to 2.0V peak-peak
     Clock Dividers: 1 to 20
Post ADC Clock Divider
     Divider Settings: 1, 2, 4, 8, 16, 32
Reference Clock
     Internal: 10.0 MHz, ±5 PPM max.
     External: 10.0 MHz, ±50 PPM max (required for lock)
Digital Input / Output
     Type: TTL Logic Level (standard)
     Max. Frequency: 200 MHz
     Connection: 50 ohms to FPGA I/O
     Output Modes: 0V, Synchronized Trigger, ADC Clock ÷ 2, 3.3V
     Input Modes: Digital pulse for timestamp request
Trigger Modes
     Post Trigger: single start trigger fills active memory
     Segmented: start trigger for each memory segment
Trigger Options
     Pre-trigger Samples: samples prior to trigger are stored; Single Channel: 8k max.; Dual Channel: 4k max per channel
     Trigger Delay Samples: delay from trigger to data storage; Up to 64k digitizer clock cycles
     Total Size for Acquisition: 256 Megasamples (512 MB)
     Segment Size: Up to 128 Megasamples
     Segment Re-Arm Time: 150 nanoseconds
     Addressing: DMA transfers from starting address
Power Requirements
     +3.3V: 3.3 Amps max.
     +12V: 1.0 Amps max.
Absolute Maximum Ratings
     Analog Inputs: ±4V
     Trigger Input: -0.2V to +4V DC
     Clock Input: 5V peak-to-peak
     Operating Temperature: +32 to +122F / 0 to +50C
     Storage Temperature: -4 to +158F / -20 to +70C
     Operating Relative Humidity: 10% to 90%, non-condensing
     Operating Vibration: 0.25 G, 5 Hz to 500 Hz
     Operating Shock: 2.5 G, 11 ms, 1/2 sine
     Board Dimensions: 7.5" L x 4.3" H x 0.75" W /
190.5 mm L x 109.22 mm H x 19.05 mm W