AMPLIFIER MODULES M7279, M8879 The M7279 and M8879 are non-inverting amplifier modules, specifically designed for photodetectors such as photomultiplier tubes. These amplifier modules work with either a current or voltage input, allowing direct connection to a photomultiplier tube or other photodetectors. The M7279 is comprised of an 8-pin SIP (single inline package) type hybrid IC with protective epoxy resin and the M8879 is a 10-pin hybrid IC to allow a compact mounting size on PC board. The offset voltage and gain are easily adjusted by connecting an external variable resistor. FEATURES ● Non-inverting Amplifier Modules ● Frequency Bandwidth M7279: DC to 10 MHz M8879: DC to 150 MHz ● Compact Size ● Current-to-Voltage Conversion Factor M7279: 10 mV/µA M8879: 4 mV/µA SPECIFICATIONS MAXIMUM RATINGS (Absolute Maximum Values) Parameter Power Supply Voltage (±Vs) Operating Temperature Range Storage Temperature Range Signal Input Voltage Lead Soldering Temperature (Less than 5 s) M8879 ±6.5 0 to +40 -15 to +60 Unit V °C °C V °C M7279 100 DC to 10 M8879 80 DC to 150 Unit — MHz 10 4 mV/µA M7279 ±7 -20 to +55 -30 to +85 ±Vs +280 CHARACTERISTlCS (at 25 °C, ±Vs = ±5 V) Parameter Load Resistance: 50 Ω Voltage Gain Frequency Bandwidth (-3 dB) See Figure 1, 2 Current-to-Voltage Load Resistance: 50 Ω Conversion Factor Input Polarity Amplifying Method Input Impedance Output Impedance Load Resistance: 50 Ω Min. Maximum Output Voltage Load Resistance: 1 MΩ Min. Load Resistance: 50 Ω Typ. Output Noise Voltage Operating Temperature Range Temperature Coefficient of Output Offset Voltage Load Resistance: 50 Ω Recommended Supply Voltage Power Supply Voltage Power Supply Current Max. Weight ±1.5 ±3.5 1.0 ±1.4 ±3 2.8 — — Ω Ω V V mVrms ±0.3 ±0.2 mV/°C ±5 to ±6.5 45 1.1 ±5 to ±6 61 2.5 V mA g Positive / Negative Non-inverting Output 100 50 50 Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office. 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. ©2010 Hamamatsu Photonics K.K. AMPLIFIER MODULES M7279, M8879 ●Typical Frequency Response Figure 1: M7279 Figure 2: M8879 RELATIVE GAIN (1 dB/Div.) TACCB0063EB RELATIVE GAIN (1 dB/Div.) TACCB0057EA 0.1 1 10 1 100 10 100 1000 FREQUENCY (MHz) FREQUENCY (MHz) ●Dimensional Outline and Pin Configuration (Unit: mm) Figure 3: M7279 Figure 4: M8879 R3 WHITE DOT (PIN#1) 12.6 ± 0.2 .5 0.3 R1 1.15 5 6 7 8 FUNCTION INPUT -Vs INTERNAL CONNECTION (DO NOT USE) OPTION (SEE "HOW TO USE" SECTION) GND OUTPUT +Vs TACCA0183ED White dot mark is located on the character printed side to show the orientation of pin#1. 2.54 3 0.5 PIN# 1 2 3 4 METAL CASE 8 0.5 2.1 HAMAMATSU M7279 20.0 ± 0.2 7.5 ± 0.2 2.54 3.5 ± 0.8 3 10.4 ± 0.8 15.0 ± 0.8 21.0 ± 0.8 10.16 2.54 SILICONE PADS 2.54 2.54 2.54 +Vs 5 GND 4 -Vs 3 INPUT 2 6 OPTION PIN A 7 OPTION PIN B (SEE "HOW TO USE" SECTION) 8 OPTION PIN C 9 OUTPUT 1 GND !0 GND TACCA0249EA HOW TO USE ●M7279 (A) To adjust the offset voltage: The DC offset voltage level varies with the ambient temperature and the internal impedance of the signal lines. To adjust this offset voltage level, externally connect a variable resistor across the option lead pins as shown in figure (A) on the right. If a capacitor is connected to pin 7 as shown in figure (B) on the right, this acts as AC coupling and eliminates the offset voltage. (B) COUPLING CAPACITOR 200 kΩ OUTPUT To adjust the gain: To adjust the gain of the M7279, externally connect a resistor (Re) across pins 5 and 6 as shown in the figure below. Use a resistor of 150 Ω or more. The M7279 can be used at a gain between (1) and (2) shown in the gain graph. -Vs VR (10 kΩ to 20 kΩ) +Vs TACCC0109EA Variation of gain and frequency response RELATIVE GAIN (5 dB/Div.) GAIN INCREASING (1) WITHOUT RESISTOR (2) 150 Ω RESISTOR BETWEEN PINS #5 AND #6 (2) (1) * The output offset voltage also changes when Re is connected to the M7279. Adjust the offsett voltage by referring to the offsett voltage adjustment method explained above. 0.1 1 10 Re > = 150 Ω 100 FREQUENCY (MHz) TACCB0058EA PC board layout When designing the PC board layout for mounting the M7279, the input signal line (pin 1) must be kept as short as possible to avoid impairing the high-speed response. Do not connect the supply voltage (±Vs) to pins 1, 3, 4, 5 and 7. Use a wide area for ground. Connect external bypass capacitors between the power supply lines (±Vs) and ground, and keep the wiring as short as possible. The output impedance of the M7279 is 50 Ω. Make sure the signal output line matches the 50 Ω impedance. When mounting the M7279 on a PC board, directly insert the pins into the terminal holes on the PC board without using any socket. We recommend connecting diodes to pin 1 as shown below for over-current protection. Don't connect any of option pins to anywhere in circuit unless using the option. Keep on disconnecting condition when not used. INPUT TACCC0111EA AMPLIFIER MODULES M7279, M8879 HOW TO USE ●M8879 To adjust the offset voltage: The DC offset voltage level varies with the ambient temperature and the internal impedance of the signal lines. To adjust this offset voltage level, externally connect a variable resistor across the option lead pins as shown in figure (A) on the right. If a capacitor is connected to pin 9 as shown in figure (B) on the right, this acts as AC coupling and eliminates the offset voltage. PC board layout When designing a PC board layout for mounting the M8879, it is recommended to follow below suggestion in order to maintain its high-speed response. • The pattern for input signal line and output signal line should not be longer than 7 mm and connection should be made with coaxial cable. (The characteristic impedance of coaxial cable should be 50 Ω and the length of core cable should be as short as possible.) Use a cable clamp or a cable crimp type connector to a coaxial (cable). • All of pins from the M8879 should be connected on a PC Board. • Do not connect the supply voltage (±Vs) to the pins 2, 6, 7, 8 and 9. • Use a wide area for ground. • Connect external bypass capacitors between the power supply lines (±Vs) and ground, and keep the wiring as short as possible. • The output impedance of the M8879 is 50 Ω. Make sure the signal output line matches 50 Ω impedance. • When mounting the M8879 on a PC board, directly insert the pins into the terminal holes on the PC board without using any socket. We recommend connecting diodes to pin 2 as shown on the right for over-current protection. • Don't connect any of option pins to anywhere in circuit unless using the option. Keep on disconnecting condition when not used. (A) (B) 678 9 COUPLING CAPACITOR OUTPUT OFFSET VR 10 kΩ (TOP VIEW) TACCC0118EA INPUT 2 (TOP VIEW) TACCC0119EA CAUTION If the supply voltage exceeds the maximum rating or is misconnected, the amplifier modules may be damaged or overheat. WEB SITE www.hamamatsu.com HAMAMATSU PHOTONICS K.K., Electron Tube Division 314-5, Shimokanzo, Iwata City, Shizuoka Pref., 438-0193, Japan, Telephone: (81)539/62-5248, Fax: (81)539/62-2205 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 E-mail: [email protected] Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-2658 E-mail: [email protected] France: Hamamatsu Photonics France S.A.R.L.: 19, 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 E-mail: [email protected] United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road Welwyn Garden City Hertfordshire AL7 1BW, United Kingdom, Telephone: 44-(0)1707-294888, Fax: 44(0)1707-325777 E-mail: [email protected] 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 E-mail: [email protected] 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 E-mail: [email protected] TACC1044E01 MAR. 2010. 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