InGaAs photodiode EXACTD®-332

siliconwavelength-sensitive

Product Overview
The Excelitas EXACTD® platform provides Angle-of-Arrival (AoA) detection for Laser Warning Receiver (LWR) and Electro-Optic threat systems. The EXACTD-332 is a compact photodiode module combining Si and InGaAs detector arrays to deliver broadband sensitivity from 500 to 1650 nm in a TO-8 package, optimized for precise AoA encoding across a wide field of view.

Operation and Key Attributes
The EXACTD-332 uses a 3-bit Gray code encoding scheme to represent incident AoA with an encoded angular resolution of ±6.0°. The module can be oriented for use in either azimuth or elevation and provides a ±45° field of view. Integrated low- and high-sensitivity channels extend dynamic range, and each photodiode array includes two reference channels for baseline level determination.

Features & Benefits

• Spectral sensitivity range: 500 – 1650 nm (combined Si and InGaAs arrays)
• 3-bit Gray code encoding for ±6.0° AoA resolution
• Field of view (FoV): ±45° in azimuth and elevation
• Low- and high-sensitivity channels for wide dynamic range
• Two reference channels per photodiode array for baseline signal measurement

Illustrations
Product documentation includes principle-of-operation diagrams and performance charts showing detector response, AoA encoding, and comparative sensitivity across wavelength bands.

Caractéristiques / Spécifications techniques

• Noise current per element (pA/√Hz): 0.2
• Typical capacitance per element (pF): 13.5
• Typical Angle-of-Arrival (AoA) accuracy (RMS error) (°): 6.0
• Maximal pointing error (°): 1.8
• Angular resolution (encoded): ±6.0° (3-bit Gray code)
• Field of view (FoV): ±45° (azimuth and elevation)
• Spectral sensitivity: 500 – 1650 nm (combined Si and InGaAs arrays)
• Detector arrays: Silicon (Si) and InGaAs
• Channels: Low- and high-sensitivity channels plus two reference channels per photodiode array
• Package: Small compact TO-8 can