SiPM
WB SERIES

1×1 mm² or 3×3 mm² SiPMs in ultra-compact, quadratic, tileable BGA package

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WB Series with 1.0 x 1.0 mm² active area
WB Series with 3.0 x 3.0 mm² active area

Unique Features

High photon detection efficiency
Very low dark count rate

Ultra high cell densitity
Fast recovery time

Non-magnetic

KEY PARAMETERS

Type	Active Area [mm²]	Microcell Size [µm]	No. of Microcells	Package Dimensions [mm³]
PM1125-WB	1.0 x 1.0	25	1600	1.315 x 1.315 x 0.595
PM3315-WB	3.0 x 3.0	15	38800	3.315 x 3.315 x 0.595
PM3325-WB	3.0 x 3.0	25	13920	3.315 x 3.315 x 0.595

Device Parameters

Key parameters of SiPMs explained.

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Photo Detection Efficiency

Figure 1: Absolute Photo Detection Efficiency (PDE) of the WB Series SiPMs versus photon wavelength. The peak PDE is at 430 nm. WB Series SiPMs are sensitive over a wide range from 350 nm to 900 nm. The plot shows the values at 5.0 V overvoltage.

Dark Count Rate

Figure 2: Typical Dark Count Rate (DCR) of the WB Series SiPMs versus overvoltage. In comparison to the EB Series SiPMs the DCR greatly improved and is below 100 kHz/mm^² in the recommended operating range. Measured at 21°C.

Dynamic Range

Figure 3: Linearity of PM3315-WB and PM3325-WB versus number of impinging photons. As PM3315-WB has more cells and a faster cell recovery, it has a higher dynamic range than PM3325-WB. The measurement has been done with a short laser pulse of 70 ps length.

Pulse Shape

Figure 6: Typical pulse shape of PM3315-WB and PM3325-WB when illuminating with a short laser pulse (< 1ns). Measured at 5.0 V overvoltage with the SiPM Evaluation Kit and a 5 Ω load resistor.
Used components: PE33xx-WB-AR

Single Photon Spectrum

Figure 5: Both PM3315-WB and PM3325-WB show an excellent single photon resolution. Measured with the SiPM Evaluation Kit at 4.0 V overvoltage.
Used components: PEVAL-KIT-MCX and PE33xx-WB-AX

Coincidence Time Resolution

Figure 4: Coincidence Time Resolution (CTR) of two PM3325-WB with 3 x 3 x 20 mm^³ LYSO crystals. Measured with the SiPM Evaluation Kit at 5.0 V overvoltage.
Used components: Two PEVAL-KIT-MCX and two PE33xx-WB-AX

Scintillator Measurements

Figure 3: Example of an energy spectrum measured with PM3315-WB. The used scintillator crystal LYSO is very bright and typically SiPMs tend to respond non-linear when measuring e.g. a ^²²Na source. Due to its high cell density and fast recovery time, PM3315-WB shows a perfectly linear response and both photopeaks (511 keV, 1275 keV) are correctly located on the x-axis. Measured with the SiPM Evaluation Kit at 5.0 V overvoltage.
Used components: PEVAL-KIT-MCX and PE33xx-WB-AX