MODULE APD module C5 Variable gain and stable detection even at high gains Along with an APD, current-to-voltage conversion circuit, and high-voltage power supply circuit, the C5 contains a microcontroller to perform temperature compensation based on information from the internal thermosensor. Because temperature coefficients that match the APD temperature characteristics are written in the microprocessor chip, the APD can be operated with a highly stable gain over a wide temperature range even at high gain levels. The gain can be changed by the switch on the board or a command from a PC. Features l Gain fluctuation with temperature: ±5% Max. (M=5, Ta= to C) l Easily adjustable gain: Adjustable by switch or by PC command l Easy handling: ±5 V supply voltage l Compact and lightweight Applications l APD evaluation l Power meter l Low-light-level detection Block diagram Photoelectric sensitivity vs. cut-off frequency Voltage controller APD High voltage generator + V +5 V Temperature monitor ±5 V I/O Microcontroller (temperature compensation) High-speed current-to-voltage convertor circuit BNC connector KACCCEA Photoelectric sensitivity (V/W) 9 7 5 C777- -stage thermoelectrically cooled APD DC to 5 khz, -.5 9 V/W C5- DC to khz -.5 V/W C5 DC to MHz.5.5 7 V/W C5 DC to MHz.5 V/W C5 series 9 types are available with different active areas and wavelengths khz to MHz - V/W C55 5 khz to GHz.5 5 V/W C777 -stage thermoelectrically cooled APD khz to MHz -.5 5 V/W DC k k k M M M G Cut-off frequency (Hz) KACCB5EA
APD module C5 General ratings Parameter Symbol Condition Min. Typ. Max. Unit Supply voltage Vs +5 V +. +5. +5. V -5 V -. -5. -5. V Current consumption - +5 V - +5 +75 ma -5 V - -5-5 ma Absolute maximum ratings (Ta=5 C) Parameter Symbol Value Unit Positive supply voltage Vp + V Negative supply voltage Vn - V Maximum input light intensity - mw Operating temperature Topr to + C Storage temperature Tstg - to +7 C * No condensation Specifications (Typ. Ta=5 C, λ= nm, unless otherwise noted) Parameter Symbol Condition Value Unit Active area A φ. mm Spectral response range λ to nm Peak sensitivity wavelength λp nm Photo sensitivity S M=, λ= nm.5 A/W Feedback resistance Rf - - kω Latter-stage amplifier gain - - - times Output polarity - Positive - Cut-off frequency High band M= to 5, - db - MHz fc Low band - DC - - APD gain M Adjustable by switch or serial communication - Temperature stability of gain - M= to 5 Ta= C to C - - ±5 % Photoelectric sensitivity - M=5, λ= nm. 7.5 7.5 7 V/W Noise equivalent power NEP M=5, λ= nm -.. pw/hz / Minimum detection limit - M=5, λ= nm - pw rms Saturation input light intensity - M=5, λ= nm -. - µw Interface - RS-C
APD module C5 Spectral response Gain temperature characteristic 5 (Typ. Ta=5 C, λ= nm, M=5) (M=5) Photo sensitivity (A/W) 5 Gain variation (%) - Typ. - Wavelength (nm) - - 5 Ambient temperature ( C) KACCBEA KACCB5EA Frequency response Response to stepped light (Ta=5 C) M Relative sensitivity (db) - - - M=5 - DC. Frequency (MHz) KACCBEB Ta=5 C, gain M=5, input pulse width= µs X-axis: ns/div., Y-axis: mv/div. KACCC99EA
5 7 APD module C5 Dimensional outline (unit: mm, tolerance unless otherwise noted: ±.) Power supply connector Communication connector 55 ±.5. 5 9 ±.5 55 ±.5 Rotary switch Offset adjustment trimmer ( ). (5.) APD photosensitive surface * APD * BNC connector for output signal 9. 5 ±.5 ±.5 (.) (.7) (9) * Position accuracy of effective active area with respect to the APD package: ±. mm Power supply connector (supplied with cable) Molex: 5-AX -5 V GND +5 V Communication connector (supplied with cable) Molex: 57- GND DSR RTS RxD CTS DTR TxD DCD KACCAEB Changing the gain Changing the gain by the rotary switch The rotary switch on the PC board allows you to change the gain. Gain setting for each switch number is shown below. 9 7 Function Cannot be used Gain: Gain: Gain: 5 Gain: 75 5 Gain: Gain: 5 7 Gain: 5 Gain: Users setting 9 PC control mode Changing the gain by command from the PC Setting the rotary switch to "9" enters PC control mode. In this mode, the gain can be set to any integer value from 5 to times. Note that this gain setting is lost when the power is turned off.
APD module C5 Communication with PC Setting Bound rate: 9 bps Data bits: bits Parity: none Stop bit: bit Flow control: none Command Command #UG This command inquires the currently set gain value. Default gain is. #US This command sets the gain used with switch "9". Setting range is from 5 to. An error occurs if the setting is outside this range. The gain is set to the same value as switch "" when the power is turned on. #UW This command sets the gain used with switch "". Setting range is from 5 to. An error occurs if the setting is outside this range. The setting is retained even after the power is turned off. Transmitted data format (ASCII code: 9 characters) 9 7 5 # AA xxxx <CR> <LF> 9 # -7 Command ( bytes: US/UG/UW) - Data ( bytes: 9999) - Terminator ( bytes: carriage return + line feed) Received data format (ASCII code: 9 characters) 9 7 5 * or $ AA xxxx <CR> <LF> 9 * (OK) or $ (Error) -7 Command ( bytes: echo back) - Data ( bytes: 9999) - Terminator ( bytes: carriage return + line feed) Sample software Sample software is included on the CD-ROM that comes with the C5. The software allows controlling the C5 from a PC. Use this to check the operation of the C5. Operation screen of sample software 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. Hamamatsu Photonics K.K. HAMAMATSU PHOTONICS K.K., Solid State Division - Ichino-cho, Higashi-ku, Hamamatsu City, 5-55 Japan, Telephone: () 5--, Fax: () 5--5, www.hamamatsu.com U.S.A.: Hamamatsu Corporation: Foothill Road, P.O.Box 9, Bridgewater, N.J. 7-9, U.S.A., Telephone: () 9--9, Fax: () 9-- Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr., D- Herrsching am Ammersee, Germany, Telephone: (9) 5-75-, Fax: (9) 5-5- France: Hamamatsu Photonics France S.A.R.L.: 9, Rue du Saule Trapu, Parc du Moulin de Massy, 9 Massy Cedex, France, Telephone: -() 9 5 7, Fax: -() 9 5 7 United Kingdom: Hamamatsu Photonics UK Limited: Howard Court, Tewin Road, Welwyn Garden City, Hertfordshire AL7 BW, United Kingdom, Telephone: () 77-9, Fax: () 77-5777 North Europe: Hamamatsu Photonics Norden AB: Smidesvägen, SE-7 Solna, Sweden, Telephone: () -59--, Fax: () -59-- Italy: Hamamatsu Photonics Italia S.R.L.: Strada della Moia, /E, Arese, (Milano), Italy, Telephone: (9) -95--7, Fax: (9) -95--7 Cat. KACCE Nov. DN