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MAXIMUM RATINGS (Absolute Maximum Values) CHARACTERISTlCS (at 25 °C, ±Vs = ±5 V) AMPLIFIER MODULES M7279, M8879 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. Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office. M7279 ±Vs +280 -20 to +55 -30 to +85 ±6.5 0 to +40 -15 to +60 V V UnitParameter Power Supply Voltage (±Vs) Operating Temperature Range Storage Temperature Range Signal Input Voltage Lead Soldering Temperature (Less than 5 s) M7279 M8879 M8879 Unit MHz mV/µA Ω Ω V V mVrms mV/°C V mA g Positive / Negative Non-inverting Output 100 DC to 10 100 ±1.5 ±3.5 1.0 ±0.3 ±5 to ±6.5 1.1 DC to 150 ±1.4 2.8 ±0.2 ±5 to ±6 2.5 Load Resistance: 50 Ω See Figure 1, 2 Load Resistance: 50 Ω Load Resistance: 50 Ω Load Resistance: 1 MΩ Load Resistance: 50 Ω Operating Temperature Range Load Resistance: 50 Ω Recommended Supply Voltage Min. Min. Typ. Max. Parameter Voltage Gain Frequency Bandwidth (-3 dB) Current-to-Voltage Conversion Factor Input Polarity Amplifying Method Input Impedance Output Impedance Maximum Output Voltage Output Noise Voltage Temperature Coefficient of Output Offset Voltage Power Supply Voltage Power Supply Current Weight SPECIFICATIONS The M7279 and M8879 are non-inverting amplifier modules, specifically designed for photodetectors such as photomulti- plier tubes. These amplifier modules work with either a cur- rent or voltage input, allowing direct connection to a photo- multiplier tube or other photodetectors. The M7279 is com- prised 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 exter- nal variable resistor.

FEATURES

G Non-inverting Amplifier Modules G Frequency Bandwidth M7279: DC to 10 MHz M8879: DC to 150 MHz G Compact Size G Current-to-Voltage Conversion Factor M7279: 10 mV/µA M8879: 4 mV/µA

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. 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 a void 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 socke t. 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. 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. TACCC0109EA TACCC0111EA TACCB0058EA Re 150 Ω>= GAIN INCREASING Variation of gain and frequency response FREQUENCY (MHz) RELATIVE GAIN (5 dB/Div.) 0.1 1 10 100 (2) (1) (10 kΩ to 20 kΩ) VR (A) (B) -Vs +Vs COUPLING CAPACITOR OUTPUT 200 kΩ WITHOUT RESISTOR 150 Ω RESISTOR BETWEEN PINS #5 AND #6 (1) (2) * 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. INPUT GM7279 HOW TO USE

MAR. 2010. IP AMPLIFIER MODULES M7279, M8879 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 Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-2658 E-mail: info@hamamatsu.de 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: info@hamamatsu.co.uk 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: info@hamamatsu.se 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: info@hamamatsu.it WEB SITE www.hamamatsu.com CAUTION If the supply voltage exceeds the maximum rating or is misconnected, the amplifier modules may be damaged or overheat. GM8879 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 op- tion 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 con- nection 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 im- pedance.
  • 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 discon- necting condition when not used. TACCC0118EA TACCC0119EA (A) (B) (TOP VIEW) 678 9 OFFSET VR 10 kΩ OUTPUT COUPLING CAPACITOR (TOP VIEW) INPUT HOW TO USE