PX12500A – 500 MS/s, 12 bit, AC Coupled, 2 Channel, PCIe x8, High Speed Digitizer Board

The PX12500A is an AC-coupled dual channel waveform capture board that provides a remarkable combination of high speed and high resolution sampling along with a very large memory capacity. Signal frequencies up to 200 MHz can be accurately captured when using the programmable gain amplifier or up to 500 MHz if the direct transformer coupled connection is used.

The PX12500A has a primary sample-data RAM bank of 512 MB memory that may be used as an exceptionally large FIFO for acquiring non-stop, continuous data directly to the PCI Express (PCIe) bus. In Buffered Acquisition Mode (where the 512 MB RAM FIFO is used) the PX12500A is capable of sustaining 1400 MB/s over the PCIe bus. Significant test data has shown that recording with large FIFO buffering can be continuous at these rates even when operating in traditional non real-time environments such as the Windows operating system.

The PX12500A was designed to maximize the quality of the captured signal in terms of signal-to-noise ratio and spurious-free dynamic range over a very wide frequency range. The programmable amplifier allows for setting the full scale input voltage from 220 millivolts to 3.5 volts in 1 dB steps.

A frequency synthesized clock allows the ADC sampling rate to be set to virtually any value from 20 to 500 MHz (except 277.5 to 308.3 MHz and 444 to 463 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.





Product Specifications


Product: PX12500A (AC-Coupled) Full Data Sheet
Update: Revision 1.02 - 04/03/2012
File Size: 619 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 – Amplifier
     Full Scale Voltage Ranges: 220 mV to 3.5 V in 1dB steps
     Impedance: 50 ohms
     Bandwidth: 100kHz - 200 MHz (Bessel filter)
     SNR (1-200 MHz): 61 dB
     SFDR (@ 100 MHz): 75 dB
 
Analog Inputs – Transformer
     Full Scale Voltage Ranges: 1.1 Volts
     Impedance: 50 ohms
     Bandwidth: 500 kHz to 500 MHz
     SNR (1-200 MHz): 63 dB
     SFDR (@ 100 MHz): 77 dB
 
External Trigger
     Signal Type: digital, TTL signal level
     Impedance: >10k ohms
     Bandwidth: 50 MHz
 
Internal Synthesized Clock
     Frequency Range: 58.0 - 500 MHz
     Resolution: better than 10 PPM
     Accuracy: better than 5 PPM
     Unsettable Ranges: 277.5 - 308.3 MHz and 444 - 463 MHz
 
External Clock
     Signal Type: sine wave or square wave
     Coupling: AC
     Impedance: 50 ohms
     Frequency: 20 MHz to 500 MHz
     Amplitude: 100 mV p-p to 2.0 V p-p
 
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
 
Trigger Modes
     Post Trigger: single start trigger fills active memory
     Pretrigger: single trigger stops acquisition
     Segmented: start trigger for each memory segment
 
Trigger Options
     Pretrigger Samples: samples prior to trigger are stored; Single Channel: 8k max.; Dual Channel: 4k max per channel
 
     Delayed Trigger: delay from trigger to data storage; Up to 64k digitizer clock cycles
 
Memory
     Total Size: Up to 256 Megasamples
     Segment Size: Up to 128 Megasamples
     Segment Re-Arm Time: 150 nanoseconds
     Addressing: DMA transfers from starting address
 
Power Requirements
     +12V: 1.0 Amps max.
     +3.3V: 3.3 Amps max.
 
Absolute Maximum Ratings
     Analog Inputs: +/- 4 volts
     Trigger Input: -0.2 to +4.0 volts DC
     Clock Input: 5 volts 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 /
19.0cm L x 10.9cm H x 1.9cm W