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| PSD Signal processing circuit for 1-D PSD C5923 Circuit board for easier 1-D PSD operation Features Position can be measured just by installing a 1-D PSD on the board. l Accurate position sensing Use of pulse-driven LED allows accurate position sensing even under background light, and independent of pulsed light intensity. l Compact design An LED drive circuit, head amp, signal addition/subtraction circuits, sample hold circuit, synchronization circuit and analog divider circuit are mounted on a compact PC board. Applications l No complicated adjustments required l Displacement measurements using pulsed light synchronized with the circuit l Various studies using 1-D PSD l Performance evaluation of 1-D PSD s A bsolute m axim um ratings P aram eter S upply voltage S ig nal Input signal current proc essor O utput short-circuit tim e O perating tem perature Transistor collector-em itter voltage LE D Transistor collector current * 1 driver Transistor collector dissipation * 1 S ym bol V cc M ax. IIN M ax. Topr VCE Ic Pc V alue 18 V cc M ax. x 10 -5 Continuous 0 to +50 +30 800 600 Unit V A s C V mA mW s R ecom m ended operating range P aram eter S upply voltage S ym bol V cc Condition M in. 14.5 Typ. 15 M ax. 15.5 Unit V s S pecifications / characteristics (Ta= 25 C, Vcc=15 V ) Condition M in. Typ. M ax. Unit V /A F actory setup prior to ship ping 0.95 x 10 5 1 x 10 5 1.05 x 10 5 21 22 23 pF F actory setup prior to ship ping 1 x 10 -5 1 x 10 -4 A P hotoc urre nt w ith P S D ins talle d O utput response tim e versus m ovem ent of light Rise tim e (output 10 to 90 % ) tr 30 s spot position, m easured with P S D installed. S ig nal VR 0 5 14 V F actory setup prior to ship ping proc essor P SD reverse voltage O utput offset voltage Vos *5 -10 +10 mV W ith P SD installed and O utput voltage am plitude * 4 Vo light spot falling on edge -10 +10 V of active area. 5 O utput noise (analog divider) Vn A ll range * 5 10 50 m Vp-p Current consum ption Icc *5 45 mA Transistor collector current Ic *1 170 m Ap-p LE D Rep etition frequency fT *1 3333 Hz driver O utput m ethod O pen collector *1: D uty ratio: 3/10, pulse width: 90 s, LED: L1915-01 (m ade by Ham am atsu; sold separately) *2: 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 x 10 4 to 1 x 10 6 . For m ore details, see the instruction m anual that com es with the product. *3: P SD does not operate correctly if the input signal current is outside the specified range. *4: M axim um output am plitude can be adjusted in a range of 2 to 10 V according to PS D type to be used. *5: W ith no P SD installed and LED turned off; pulsed current of 20 A (X 1=X2) is supplied to the circuit as current signal (duty ratio: 3/10, pulse w idth: 90 s) that substitutes for P SD photocurrent P aram eter Head am p conversion im pedance * 2 Feedback capacitance * 2 Input signal current * 3 S ym bol Rf Cf IIN 1 Signal processing circuit for 1-D PSD s Dimensional outline (unit: mm, tolerance: 0.2 mm) 37.5 37.5 THROUGH HOLES FOR EXTERNALLY CONNECTED PSD C5923 s PSD and output voltage OUTPUT Vo (V) 54321 12.5 L L/2 PSD INSTALLTION POSITION L/4 -L/2 -L/4 -L/2 S1352, S3270 L/2 LIGHT SPOT POSITION X (mm) 110 102 D-SUB CONNECTOR (Hirose Electric: RDAB-15P) -L S3931, S3932 (4 x) 3.2 S3979 CENTER OF PSD ACTIVE AREA PHOTOSENSITIVE SURFACE LIGHT SPOT X KACCB0040EB 67 75 15.5 MAX. KACCA0054EB 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. - L 2 + L 2 KPSDC0062EA s Input/output terminals q D-sub connector T erm inal No. Name Content 1 VREF R eference voltage m onitor output 2 VR PSD bias voltage monitor output Divider output 3 Vo (position-converted voltage) 4 K C onnection to LED or other cathode 5 A C onnection to LED or other anode 6 +V +15 V input 7 -V -15 V input 8 G GND 9 V1 Head amp output 1 10 V2 Head amp output 2 11 V3 Subtracted signal pulse output 12 V4 Summed signal pulse output 13 V5 Subtracted signal output after S/H * 14 V6 Sum m ed signal output after S/H * 15 G GND * S/H: sample hold s Operating example D-SUB CONNECTOR PSD X1 1 C 5 X2 C5923 6 7 8 3 4 5 +15 V -15 V GND CONSTANT + VOLTAGE - G POWER SUPPLY + - VOLTMETER LED (LD) CATHODE (-) LED (LD) ANODE (+) KACCC0071EA Measurement conditions 1. Light source: LED (p=900 nm) 2. Light spot: 200 m 3. PSD: S1352 (L=34 mm) 4. PSD photocurrent: 10 A 5. Frequency bandwidth: 10 Hz 6. Voltmeter: 195A (KEITHLEY) 7. Constant voltage power supply: 15 V, power supply capacity: 0.2 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. 0.6 m (calculated value) q Through holes for externally connected PSD T erm inal No. Name Content 1 IN1 Input from PSD output 1 2 G GND Bias voltage output for 3 VR connection to PSD cathode 4 G GND 5 IN2 Input from PSD output 2 s Accessories * Connector HDAB-15S (HIROSE: 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. (c)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: Smidesvagen 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. KPSD1011E03 Apr. 2003 DN |
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