AMPLIFIER MODULE
M8879
The M8879 is a non-inverting amplifier module with 150 MHz
bandwidth response, specifically designed for photodetectors
such as photomultiplier tubes. The M8879 works with either a
current or voltage input, allowing direct connection to a pho-
tomultiplier tube or other photodetectors. The M8879 is com-
prised of a 10 pin hybrid IC to allow a compact mounting size
on PC board. The offset voltage is easily adjusted by connect-
ing an external variable resistor.
I
FEATURES
G
Non-inverting amplifier module operable
from DC to 150 MHz
G
I/V Conversion Ratio: 4 V/mA
G
Compact size: 20 mm
×
12.6 mm
×
8 mm
MAXIMUM RATINGS (Absolute Maximum Values)
Parameter
Supply Voltage (±Vs)
Operating Temperature Range
Storage Temperature Range
Maximum Input Voltage
Lead Soldering Temperature (Less than 5 s)
Description/Value
±6.5
0 to +40
-15 to +60
±Vs
+280
Unit
V
°C
°C
V
°C
Unit
V
mA
—
V/mA
MHz
V
V
Ω
Ω
mV/°C
nV⋅Hz
-1/2
g
CHARACTERISTICS (at 25
°C, ±Vs
=
±5
V)
Supply Voltage
Supply Current
Voltage Gain (Vout/Vin)
I/V Conversion Ratio
Frequency Response
Maximum Output Swing
Input Impedance
Output Impedance
Temp. Coefficient of
Output Offset Voltage
Equivalent Input Noise
Weight
*R
L
: Output Load Resistor
Parameter
Recommend Supply Voltage
With no R
L
*
Voltage Input, R
L
= 50
Ω*
Current Input, R
L
= 50
Ω*
Vout (p-p) = 1 V, -3 dB Bandwidth
R
L
= 50
Ω*
With no R
L
*
Typ.
±5
to
±6
31
80
4
0 to 150
1.4
3
50
50
±0.2
2.3
2.5
0
°C
< Temperature < +40
°C,
R
L
= 50
Ω*
Figure 1: Typical Frequency Response
TACCB0063EB
RELATIVE GAIN (1 dB/Div.)
1
10
100
1000
FREQUENCY (MHz)
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 HAMAMATS U 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.
©
2002 Hamamatsu Photonics K.K.
AMPLIFIER MODULE M8879
HOW TO USE
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 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
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 discon-
necting condition when not used.
(A)
(B)
678
9
COUPLING
CAPACITOR
OFFSET VR
10 kΩ
OUTPUT
(TOP VIEW)
TACCC0118EA
INPUT
2
(TOP VIEW)
TACCC0119EA
Figure 2: Dimensional Outline and Pin Configuration (Unit: mm)
20.0 ± 0.2
R3
12.6 ± 0.2
7.5 ± 0.2
.5
R1
METAL CASE
2.1
0.5
2.54
+Vs
5
GND
4
-Vs
3
INPUT
2
1
GND
!0
GND
10.16
2.54
SILICONE PADS
2.54
2.54
2.54
6
OPTION PIN A
7
OPTION PIN B (SEE "HOW TO USE" SECTION)
8
OPTION PIN C
9
OUTPUT
TACCA0249EA
CAUTION
If the supply voltage exceeds the maximum rating or is misconnected, the M8879 may be damaged or overheat.
3
8
HOMEPAGE URL http://www.hamamatsu.com
HAMAMATSU PHOTONICS K.K., Electron Tube Center
314-5, Shimokanzo, Toyooka-village, Iwata-gun, Shizuoka-ken, 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: usa@hamamatsu.com
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
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 E-mail: infos@hamamatsu.fr
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
TACC1026E01
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
MAR. 2002 IP
单片机
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
