J-Series High PDE and Timing Resolution, TSV Package

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1 High PDE and Timing Resolution SiPM Sensors in a TSV Package SensL s J-Series low-light sensors feature an industry-leading low dark-count rate and a high PDE (photon detection efficiency) that extends much further into the blue part of the electromagnetic spectrum, using a high-volume, P-on-N silicon foundry process. The J-Series sensors incorporate major improvements in the transit time spread which results in a significant improvement in the timing performance of the sensor. J-Series sensors are available in two sizes ( and ) and use a TSV (Through Silicon Via) process to create a CSP (Chip Scale Package) with minimal deadspace, that is compatible with industry standard lead-free, reflow soldering processes. The J-Series Silicon Photomultipliers (SiPM) form a range of high gain, single-photon sensitive, UV to visible light sensors. They have high performance combined with the practical advantages of solid-state technology: low operating voltage, excellent temperature stability, robustness, compactness, output uniformity, and low cost. For more information on the J-Series sensors please refer to the website, PERFORMANCE PARAMETERS Sensor Size Microcell Size Parameter 1 Overvoltage Min. Typical Max. Units, Breakdown Voltage (Vbr) V, Recommended Overvoltage 1 6 V Range (Voltage above Vbr), Spectral Range nm, Peak PDE Wavelength (lp) 420 nm 31 % 38 % 42 % PDE 4 Vbr + 6.0V 51 % 38 % Vbr + 6.0V 51 % khz/mm khz/mm khz/mm 2 Dark Count Rate 5 Vbr + 5.0V khz/mm khz/mm 2 Vbr + 5.0V khz/mm 2 1 All measurements made at 5.0V overvoltage and 21 C unless otherwise stated. 2 The breakdown voltage (Vbr) is defined as the value of the voltage intercept of a straight line fit to a plot of I vs V, where I is the current and V is the overvoltage. 3 The range where PDE >2.5% at Vbr + 5.0V. 4 PDE does not contain afterpulsing or crosstalk. 5 Dark count rate is derived from dark current data. SensL

2 PERFORMANCE PARAMETERS (CONTINUED) Sensor Size Microcell Size Parameter Overvoltage Min. Typical Max. Units 9.1x x10 6 Gain 1.7x10 6 Vbr + 5.0V (anode-cathode) 5.3x x10 6 Vbr + 5.0V 5.3x ma Dark Current Vbr + 5.0V ma ma Vbr + 5.0V ma, Rise time ps anode-cathode output 300 ps 12 ns Microcell recharge time constant 7 37 ns 48 ns TBD pf Capacitance 8 (anode output) 1000 pf 4000 pf TBD pf Capacitance 8 (fast terminal) 50 pf 200 pf 1.4 ns Fast output pulse width (FWHM) 1.4 ns 3.0 ns 5 % 7 % 10 % Crosstalk Vbr + 5.0V 22 % 7 % Vbr + 5.0V 22 %, 0.1 %, Vbr + 5.0V 1.0 % Afterpulsing 0.1 % Vbr + 5.0V 1.0 %, Temperature dependence of Vbr 9 <21.5 mv/ o C 6 Measured as time to go from 10% to 90% of the peak amplitude and measured over a 1W series output resistor. 7 RC charging time constant of the microcell (t) 8 Capacitance values are for the complete TSV package. 9 Calculated as the change in Vbr extracted from pulsed laser gain measurements. SensL

3 GENERAL PARAMETERS 30020, Active area 3.07 x 3.07 mm x 6.07 mm 2 No. of microcells Microcell fill factor 30020: 14, : 5, : 62% 30035: 75% 60035: 22, : 75% TSV Package Specifics 30020, Package dimensions 3.16 x 3.16 mm x 6.13 mm 2 Recommended operating temperature range Soldering conditions -40 o C o C Reflow solder Cover material Glass Cover refractive Index 436nm Moisture sensitivity level Tape & reel MSL3 * Cut tape MSL4 * Maximum Current 10mA 15mA TSV-packaged J-Series sensor * Please refer to the TSV Handling and Soldering guide for more information on MSL for different delivery options. SensL

4 PERFORMANCE PLOTS SensL

5 EVALUATION BOARD OPTIONS SMA BIASING BOARD (MicroFJ-SMA-XXXXX) The MicroFJ-SMA is a printed circuit board (PCB) that can facilitate the evaluation of the J-Series sensors. The board has three female SMA connectors for connecting the bias voltage, the standard output from the anode and the fast output signal. The output signals can be connected directly to a 50W-terminated oscilloscope for viewing. The biasing and output signal tracks are laid out in such a way as to preserve the fast timing characteristics of the sensor. The MicroFJ-SMA is recommended for users who require a plugand-play set-up to quickly evaluate J-Series TSV sensors with optimum timing performance. The board also allows the standard output from the anode to be observed at the same time as the fast output. The outputs can be connected directly to the oscilloscope or measurement device, but external preamplification may be required to boost the signal. The table below lists the SMA board connections. The SMA board electrical schematics are available to download in the TSV Board Reference Design document. MicroFJ-SMA-XXXXX Output Function Vbias positive bias input (cathode) Fout fast output Sout standard output (anode) PIN ADAPTER (MicroFJ-SMTPA-XXXXX) The TSV Pin Adapter board (SMTPA) is a small PCB board that houses the TSV sensor and has through-hole pins to allow its use with standard sockets or probe clips. This product is useful for those needing a quick way to evaluate the TSV package without the need for specialist surface-mount soldering. While this is a quick fix suitable for many evaluations, it should be noted that the timing performance from this board will not be optimized and if the best possible timing performance is required, the MicroFJ-SMA-XXXXX is recommended. The SMTPA circuit schematic is shown below. Please consult the J-Series User Manual for further information on biasing. The SMTPA board electrical schematics are available to download in the TSV Board Reference Design document. SMTPA circuit schematic Top view of the SMTPA board showing the pin numbering MicroFJ-SMTPA-XXXXX Pin No. Connection 1 anode 2 fast output 3 cathode 4 ground 5 no connect SensL

6 CIRCUIT SCHEMATICS An SIPM is formed of a large number (hundreds or thousands) of microcells. Each microcell (Figure 1) is an avalanche photodiode with its own quench resistor and a capactively coupled fast output. These microcells are arranged in a close-packed array with all of the like terminals (e.g. all of the anodes) summed together (Figure 2). The array of microcells can thus be considered as a single photodiode sensor with three terminals: anode, cathode and fast output, as shown in Figure 3. Figure 1, Circuit schematic of the SensL SiPM microcell, showing details of the Fast Output. Figure 2, Simplified circuit schematic of the SensL SiPM showing only a 12 microcell example. Typically, SiPM sensors have hundreds or thousands of microcells. Figure 3, SensL SiPM component symbol. TILING OF THE TSV PACKAGE For the J-Series, SensL has developed a market-leading, high-performance package using a TSV process. It is a chip-scale package that is compatible with lead-free, reflow soldering processes. The glass cover is ideal for coupling to scintillators or fibre optic elements. The dead-space between the sensor active area and the edge of the package has been minimized, resulting in a package that can be tiled on 4 sides with high fill-factor. This allows multiple sensors to be configured into unique layouts for a wide range of custom applications. The distance between sensor packages can be as little as 200um when tiled, but actual alignment and placement tolerances will depend on the accuracy of the user s assembly process. A Technical Note is available that gives advice on creating arrays of the TSV sensors. SensL

7 PACKAGE DRAWINGS (All Dimensions in mm) MicroFJ-300XX-TSV-A1 TOP VIEW BOTTOM VIEW Pin Assignments SIDE VIEW Pin # MicroFJ-300XX-TSV B1 Anode B3 Fast Output A1, C3 Cathode All others No Connect * * The No Connect pins are electrically isolated and should be soldered to a ground (or bias) plane to help with heat dissipation. The complete MicroFJ-300XX-TSV-A1 CAD and solder footprint file is available to download here. SensL

8 PACKAGE DRAWINGS (All Dimensions in mm) MicroFJ TSV-A1 TOP VIEW BOTTOM VIEW SIDE VIEW Pin Assignments Pin # MicroFJ TSV C1, D1 Anode A1, F6 Cathode C6, D6 Fast Output All others No Connect * The No Connect pins are electrically isolated and should be soldered to a ground (or bias) plane to help with heat dissipation. The complete MicroFJ TSV CAD and solder footprint file is available to download here. SensL

9 MicroFJ-SMA Board TOP VIEW BOTTOM VIEW SIDE VIEW The complete CAD for the SMA boards can be downloaded from the website: version and version. MicroFJ-SMTPA Board TOP VIEW SIDE VIEW BOTTOM VIEW The complete CAD for the SMTPA boards can be downloaded from the website: version and version. SensL

10 ORDERING INFORMATION Product Code sensors Microcell size (number of microcells) Sensor active area Description Delivery options b MicroFJ TSV a MicroFJ-SMA a 20µm (14,850) 4-side tileable, chip scale package with through-silicon vias (TSV) TSV sensor mounted onto a PCB with three SMA connectors for bias, standard output and fast output. WP d, TA, TR c PK MicroFJ-SMTPA a TSV sensor mounted onto a pin adapter board PK 3.07mm x 3.07mm 4-side tileable, chip scale package with MicroFJ TSV WP through-silicon vias (TSV) d, TA, TR c MicroFJ-SMA µm (5,676) TSV sensor mounted onto a PCB with three SMA connectors for bias, standard output and fast output. MicroFJ-SMTPA TSV sensor mounted onto a pin adapter board PK PK sensors MicroFJ TSV MicroFJ-SMA µm (22,292) 6.07mm x 6.07mm 4-side tileable, chip scale package with through-silicon vias (TSV) TSV sensor mounted onto a PCB with three SMA connectors for bias, standard output and fast output. GP, TA, TR c PK MicroFJ-SMTPA TSV sensor mounted onto a pin adapter board PK a Check with SensL sales for availability. b The two-letter delivery option code should be appended to the order number, e.g.) to receive a MicroFJ TSV in a Gel Pack, use MicroFJ TSV-GP. The codes are as follows: PK = ESD Package GP = Gel Pack WP = Waffle Pack d TA = Tape TR = Tape and Reel c c The TR (Tape and Reel) delivery option has a minimum order quantity (MOQ) of 3000, and is available in multiples thereof. d WP and GP options only available for small quantity orders, please discuss with SensL sales. Rev. 2.2, Preliminary, May 2016 All specifications are subject to change without notice sales@sensl.com (International) (North America) SensL