FEATURES

• Digitization: 14 bits at 40 MSPS or 80 MSPS.

• Peaking Time range: 0.1 to 24 μs at 40 MSPS.

• 25.5 dB Variable Analog Gain range and +/- 6 dB Digital Fine Gain adjustment.

• USB 2.0 and RS-232 communications + customizable user digital I/O.

• Complete instrument control via XIA’s ProSpect software and Handel drivers.

APPLICATIONS

• X-ray Spectroscopy: Hand-held, table-top, and embedded process control.

• Gamma-ray Spectroscopy: Low cost gamma-ray spectrometer for portable or dedicated applications.

• Scintillation Detectors: Scintillator/photodiode and scintillator/photomultiplier combinations.

• Neutron / Gamma Discrimination: Particle ID with CsI or other detectors.

SPECIFICATIONS

ADC

• The microDXP’s speed and power consumption are set by the digitizing rate of the 14-bit ADC.

• The standard digitizing rate is 40 MSPS.

• An 80 MSPS version is also available.

Spectroscopy Amplifier

• All settings are digitally controlled, including gain, peaking time and other filtering and pile-up inspection parameters.

• Peaking Time Range: 100 ns to 24 μs with standard 40 MSPS ADC: 50 ns to 12 μs with 80 MSPS ADC.

• Gain: Two analog gain options are available, combined with a digital fine gain adjustment of ± 6dB:

• Variable Gain (default): Switched variable gain with a 25.5 dB range to match the detector and preamp type.

• Fixed Gain (optional): Factory set using precision resistors to match specific detector and preamplifier type. (Lower power consumption and cost).

Communications

• Primary: RS232 serial port operates at up to 921 kBaud (80 kBytes/s: 40 ms to transfer 1k spectrum at 3 Bytes per channel). USB 2.0 operates at 10 MBytes/s.

• Secondary: Customizable serial and parallel ports can be used to communicate with embedded hardware.

• Auxiliary I/O: Real-time GATE input, I²C, and four general purpose digital I/O lines.

Power

• Power Consumption: Depends on clock speed and installed options. Approx 750 mW with 40MSPS and variable gain.

• Digital: +3.3V @ 150 mA (300 mA peak).

• Analog Option 1: ± 5.0V @ 50 mA clean supply.

• Analog Option 2: >± 5.25V @ 50 mA dirty supply to feed onboard linear regulators.

MCA

• Spectrum size: Up to 8K channels, 24 bits deep.

• Statistics: Input counts detected, output counts to the spectrum, live time and real time.

• Run Control: Automatic run termination according to configurable user presets.

Non-Volatile Memory

• A distinguishing feature of the microDXP is its onboard non-volatile memory. All operating firmware is factory pre- loaded but can also be upgraded in the field. Additionally, all settings are saved in arrays that can be stored and retrieved on both a per-peaking time and per MCA- configuration basis.