PSD Signal processing circuit for 1-D PSD C3683-01 Circuit board for easier 1-D PSD operation Features Applications l No complicated adjustments required Position can be measured just by installing a 1-D PSD on the board. l Accurate position sensing Position data of light spot is independent of light intensity. l Compact design Head amp, signal addition/subtraction circuits, and analog divider circuit are mounted on a compact PC board. l Displacement measurements using DC light l Various studies using 1-D PSD l Performance evaluation of 1-D PSD ■ Absolute maximum ratings Parameter Supply voltage Input signal current Output short-circuit time Operating temperature Symbol Vcc Max. IIN Max. Topr Value ±18 Vcc Max. × 10-5 Continuous 0 to +50 Unit V A s °C ■ Recommended operating range Parameter Supply voltage Symbol Vcc Condition Min. ±14.5 Typ. ±15 Max. ±15.5 Unit V ■ Specifications / Characteristics (Ta=25 °C, Vcc=±15 V) Parameter Head amp conversion impedance *1 Feedback capacitance Symbol Rf Cf Condition Min. Typ. Max. Unit 0.95 × 105 1 × 105 1.05 × 105 V/A Factory setup prior to shipping 950 1000 1050 pF Factory setup prior to shipping Photocurrent with PSD 2 -5 -4 1 × 10 Input signal current * IIN 1 × 10 A installed Output res pons e tim e vers us m ovem ent of light Rise time (output 10 to 90 %) tr 300 µs spot pos ition, m eas ured w ith P SD installed. PSD reverse voltage VR 0 +5 +14 V Factory setup prior to shipping Output offset voltage Vos *3 -10 +10 mV With PSD installed and Output voltage amplitude Vo light spot falling on edge -10 +10 V of active area. Output noise (analog divider) Vn All range *3 25 mVp-p Current consumption Icc *3 ±15 mA *1: These resistors are lead types and inserted into sockets, so it can be easily to exchange by the user if necessary in a range between 1 × 104 to 1 × 106 Ω. For more details, see the instruction manual that comes with the product. *2: PSD does not operate correctly if the input signal current is outside the specified range. *3: With no PSD installed, 20 µA (X1=X2) is supplied to the circuit as current signal that substitutes for PSD photocurrent 1 Signal processing circuit for 1-D PSD ■ PSD and output voltage ■ Dimensional outline (unit: mm, tolerance: ±0.2 mm) THROUGH HOLES FOR EXTERNALLY CONNECTED PSD 56 28 28 50 OUTPUT Vo (V) +10 PSD INSTALLTION POSITION 54321 11.5 C3683-01 L -2 L +2 0 66 60 LIGHT SPOT POSITION X (mm) -10 KACCC0040EA CENTER OF PSD ACTIVE AREA PHOTOSENSITIVE SURFACE LIGHT SPOT X (4×) 3.2 D-SUB CONNECTOR (Hirose Electric: RDEB-9P) 15.5 MAX. - L 2 + L 2 KACCA0035EC KPSDC0062EA S1352, S3931 and S3932 (PSD made by Hamamatsu) can be directly mounted on the board. To mount other types of 1-D PSDs, use through holes on the board. ■ Operating example ■ Input/output terminals ● D-sub connector Name Term inal N o. 1 VR 2 Vo 3 4 5 6 7 8 9 -V +V G VB V2 V1 VA PSD Content PSD bias voltage m onitor output Divider output (position-converted voltage) -15 V input +15 V input GND Subtracted signal output Head amp output 2 Head amp output 1 Summed signal output ● Through holes for externally connected PSD Name Content Term inal N o. 1 IN1 Input from PSD output 1 2 G GND Bias voltage output for R 3 V connection to PSD cathode 4 G GND 5 IN2 Input from PSD output 2 X1 C 1 5 C3683-01 4 5 3 2 5 X2 +15 V CONSTANT GND VOLTAGE POWER -15 V SUPPLY Vo GND VOLTMETER KACCC0039EA Measurement conditions 1. Light source: LED (λp=900 nm) 2. Light spot: φ200 µm 3. PSD: S1352 (L=34 mm) 4. PSD photocurrent: 10 µA 5. Voltmeter: 195A (KEITHLEY) 6. Frequency bandwidth: 10 Hz 7. Constant voltage power supply: ±15 V, power supply capacity: 0.1 A or more, ripple voltage: 3 mVp-p or less When measured under the above conditions, the following output voltage amplitude and position resolution can be obtained. · Output voltage amplitude: VFS=±10 V · Position resolution: ∆l=approx. 0.3 µm (calculated value) ■ Accessories · Connector HDEB-9S (Hirose Electric: For connections to power supply and output readout device) Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2003 Hamamatsu Photonics K.K. HAMAMATSU PHOTONICS K.K., Solid State Division 1126-1 Ichino-cho, Hamamatsu City, 435-8558 Japan, Telephone: (81) 053-434-3311, Fax: (81) 053-434-5184, http://www.hamamatsu.com U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P.O.Box 6910, Bridgewater, N.J. 08807-0910, U.S.A., Telephone: (1) 908-231-0960, Fax: (1) 908-231-1218 Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49) 08152-3750, Fax: (49) 08152-2658 France: Hamamatsu Photonics France S.A.R.L.: 8, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: 33-(1) 69 53 71 00, Fax: 33-(1) 69 53 71 10 United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Hertfordshire AL7 1BW, United Kingdom, Telephone: (44) 1707-294888, Fax: (44) 1707-325777 North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171 41 Solna, Sweden, Telephone: (46) 8-509-031-00, Fax: (46) 8-509-031-01 Italy: Hamamatsu Photonics Italia S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39) 02-935-81-733, Fax: (39) 02-935-81-741 2 Cat. No. KPSD1004E03 Apr. 2003 DN