Avalanche photodiode (APD) module C30902SH-DTC

Overview
Excelitas C30902SH-DTC is a silicon single-photon avalanche diode (SPAD) designed for ultra-low light detection and photon-counting applications. The device supports operation in Geiger mode (VOP > VBD) for single-photon detection and in linear mode (VOP < VBD) with internal avalanche gains typically ≥250. Units are available with integrated single- or dual-stage thermoelectric coolers for enhanced dark-count performance.

Key features

• 0.5 mm active diameter SPAD in TO-66 flange outline package
• High quantum efficiency — typ. 84% at 800 nm
• Extremely low noise performance at reduced temperatures (example: -20 °C)
• Internal avalanche gain typically >250 (linear mode)
• Spectral response: 400 nm – 1100 nm
• Fast time response — typ. 0.4 ns
• Wide operating temperature range: -40 °C to +85 °C
• Optional built-in single- or dual-stage thermoelectric (TE) cooler

Applications

• LiDAR and Time-of-Flight (ToF) systems
• Quantum communication and cryptography
• Photon counting and single-photon detection
• Optical Time-Domain Reflectometry (OTDR)
• Laser scanning and low-light sensing

Technical specifications

• Active area: 0.2 mm²
• Active diameter: 0.5 mm
• Breakdown voltage (typ.): 225 V
• Capacitance (typ.): 1.5 pF
• Temperature coefficient: typ. 0.7 V/°C
• Dark current: 1 nA
• Dark noise: 0.02 pA/√Hz
• Noise equivalent power (NEP): 0.15 fW/√Hz
• Typical responsivity: 135 A/W at 800 nm
• Recommended gain: 250
• Package: TO-66, flange outline