SAPHIRA

AVALANCHE PHOTODIODE ARRAY

The Saphira detector is designed for high speed infrared applications and is the result of a three year research and development program alongside the European Southern Observatory on sensors for astronomical instruments. It delivers world leading photon sensitivity of <1 photon rms with Fowler sampling and high speed non-destructive readout (>10K frame/s).

Saphira is an HgCdTe avalanche photodiode (APD) array incorporating a full custom ROIC for applications in the 0.8 to 2.5μm range. A key aspect of the array is the ability to perform multiple non-destructive readouts which can allow Fowler sampling or “down the slope” sampling to significantly reduce the noise and increase the sensitivity.

The architecture allows multiple, independently resettable windows and a selectable number of parallel outputs up to 32.

Applications include wavefront sensors, fringe trackers, spectroscopy, and imaging in any photon starved scenario.

Saphira_Image 2

Saphira_Image 1

MAIN FEATURES

  • Flexible integration and readout modes
  • Multiple independently resettable windows
  • Selectable number of outputs up to 32
  • Variable avalanche gain
  • Voltage clamp function to minimize persistence
  • Frame rate up to 100K frames per second with windowing
  • Wavelength tuned to application
  • Windowing function to 1 pixel

KEY BENEFITS

  • Combination of high sensitivity and high frame rate

PACKAGING OPTIONS

  • Currently offered in a 68 pin LCC
  • Please contact us to discuss packaging options

TECHNICAL SPECIFICATIONS

FORMAT

  • Array: 320 x 256 pixels
  • Pixel Pitch: 24μm
  • Active Area: 7.68 x 6.14

TYPICAL PERFORMANCE

  • Avalanche gain range: Up to 80
  • Median Sensitivity: 1 photon RMS (at gain of 80)
  • Pixel Operability: >99%
  • Power Consumption: 30mW

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OPERATING PARAMETERS

  • Modes: Snapshot or rolling
  • Configuration Control: Single serial interface
  • Output Voltage Range: From 2.0V to 1.0V
  • Charge Capacity: 2 x 10^5 electrons
  • Number of Outputs: 4, 8, 16 or 32
  • Array Operating Temperature: 30K to 150K


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