Tetra Lateral PSDs

One and Two-Dimensional Photodiodes

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Tetra-lateral position sensing detectors are manufactured with one single resistive layer for both one and two dimensional measurements. They feature a common anode and two cathodes for one dimensional position sensing or four cathodes for two dimensional position sensing.

These detectors are best when used in applications that require measurement over a wide spacial range. They offer high response uniformity, low dark current, and good position linearity over 64% of the sensing area.

A reverse bias should be applied to these detectors to achieve optimum current linearity when large light signals are present. The circuit on the opposite page represents a typical circuit set up for two dimensional tetra-lateral PSDs.

For further details as well as the set up for one dimensional PSDs refer t the "Photodiode Characteristics" section of the catalog. Note that the maximum recommended incident power density is 10 mW / cm2. Furthermore, typical uniformity of response for a 1 mm ф spot size is ± 5% for SC-25D and SC-50D and ± 2% for all other tetra-lateral devices.

Silicon Tetra Lateral PSDs

Product Applications

  • Pulse Detectors
  • Optical Communications
  • Bar Code Readers
  • Optical Remote Control
  • Medical Equipment
  • High Speed Photometry

Product Features

  • High Speed Response
  • Low Capacitance
  • Low Dark Current
  • Wide Dynamic Range
  • High Responsivity

One-Dimensional Photodiodes

Model Number Active Area Active Area Dimensions Position Detector Error Responsivity Dark Current Capacitance Inter-Electrode Resistance Min Inter-Electrode Resistance Max Package Click Image to Zoom
LSC-5D 11.5 mm² 5.3 x 2.2 mm 0.04 mm 0.42 A/W 10 nA 50 pF 2 kΩ 50 kΩ 47 / Plastic Click to View Larger Image of (LSC-5D)
LSC-30D 122 mm² 30 x 4.1 mm 0.24 mm 0.42 A/W 25 nA 300 pF 4 kΩ 100 kΩ 46 / Plastic Click to View Larger Image of (LSC-30D)

Two-Dimensional Photodiodes, Metal Package

Model Number Active Area Active Area Dimensions Position Detector Error Responsivity Dark Current Capacitance Inter-Electrode Resistance Min Inter-Electrode Resistance Max Package Click Image to Zoom
SC-4D 6.45 mm² 2.54 mm² 0.08 mm 0.42 A/W 5 nA 20 pF 3 kΩ 30 kΩ 41 / TO-5 Click to View Larger Image of (SC-4D)
SC-10D 103 mm² 10.16 mm² 1.3 mm 0.42 A/W 25 nA 300 pF 3 kΩ 30 kΩ 44 / Special Click to View Larger Image of (SC-10D)
SC-25D 350 mm² 18.80 mm² 2.5 mm 0.42 A/W 100 nA 1625 pF 3 kΩ 30 kΩ 45 / Special Click to View Larger Image of (SC-25D)
SC-50D 957 mm² 30.94 mm² 5 mm 0.42 A/W 250 nA 3900 pF 3 kΩ 30 kΩ 21 / Special Click to View Larger Image of (SC-50D)
§ The photodiode chips in "FIL" series are isolated in a low profile plastic package. They have a large field of view as well as "in line" pins.
Chip Centering within ± 0.010".