MAXIMUM RATINGS (Absolute Maximum Values)
Parameter
Description/Value
Supply Voltage
Input Current
Operating Temperature
Storage Temperature
18 Vdc
0 to -1 mA
0 to +40
C
-20 to +60
C
Description/Value
-0.1 nA to -100
A
1 k
-8 to +4 V
-3.7 to +2 V
50
V = 0.8686 ln (I
in
)
0.02 %/
C Typ.
1.1
s
1.3
s
2.4
s
18
s
170
s
1.8
s
2.2
s
7.2
s
84
s
780
s
15
0.5 Vdc
18 mA
64 mA
Approx. 180 g
LOG AMPLIFIER UNIT
C7706
NOTE:
A
: Less than -0.2 nA input limits output at 50
load resistor terminated.
B
: Output voltage = 0 V at 1
A input
V
: Output voltage (V) at 10 M
load resistor,
I
in
: Input current (-
A)
C
: Input current: 100
A, Ambient temperature range: 0 to +40
C
D
: Input: no connection, Output: 50
load resistor terminated
FEATURES
q
Input Current Wide Dynamic Range
q
Fast Time Response
q
High Cost Performance
PRELIMINARY DATA
JUN. 1999
CHARACTERISTICS (at 25
C)
Parameter
Input Current
Input Impedance
Output Voltage
Output Impedance
Current to Voltage Conversion Factor
Temperature Coefficient (Error of fullscale)
Step Response Time
Supply Voltage
Supply Current
(at 50
load resistor)
Weight
at 1 M
load resister
at 50
load resister
-10
A to -100
A
-1
A to -10
A
-100 nA to -1
A
-10 nA to -100 nA
-1 nA to -10 nA
-100
A to -10
A
-10
A to -1
A
-1
A to -100 nA
-100 nA to -10 nA
-10 nA to -1 nA
+15 V
-15 V
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. 1999 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.
The C7706 is a high-speed logarithmic amplifier capable of amplifying the DC
output current from a photomultiplier tube.
The output signal appears as a change of 2V when the input signal changes by
one order of magnitude. The C7706 provides an output voltage that ranges from
-8V to +4V corresponding to an input signal from 0.1nA to 100
A. This conversion
performance is ideal for applications where a wide range of input signal should be
amplified at a high gain.
Figure 1: Input Current vs. Output Voltage
4
2
0
-2
-4
-6
-8
0.0001
0.001
0.01
0.1
INPUT (-
A)
OUTPUT (V)
1
10
100
TACCB0060EA
Output Voltage Accuracy (Error of fullscale)
Input Current
Output Voltage
Typical
Maximum
Accuracy
0.6 %
0.6 %
0.6 %
0.6 %
1 %
2 %
2 %
0.3 %
0.3 %
0.3 %
0.3 %
0.5 %
1 %
1 %
4 V
2 V
0 V
-2 V
-4 V
-6 V
-8 V
-100
A
-10
A
-1
A
-100 nA
-10 nA
-1 nA
-100 pA
A
B
C
D
Increase
Decrease
LOG AMPLIFIER UNIT C7706
Figure 2: Output Waveform
TACC1023E01
JUN. 1999 SI
Printed in Japan (500)
TACCB0061EA
TACCB0062EA
Figure 3: Dimensional Outline (Unit: mm)
TACCA0193EA
TACCA0194EA
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
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-2658
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: Lough Point, 2 Gladbeck Way, Windmill Hill, Enfield, Middlesex EN2 7JA, United Kingdom, Telephone: 44(20)8-367-3560, Fax: 44(20)8-367-6384
North Europe: Hamamatsu Photonics Norden AB: Smidesvgen 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
-10 A to -100 A to -10 A
Power Supply Cable (Supplied)
-1 nA to -10 nA to -1 nA
5V
OUTPUT
43.2
0.5
47.5
0.2
60.0
0.5
DIN TYPE
(6 PINS)
ALUMINUM HOUSING
SCREW HOLES FOR FIXTURE (2-M3) L=6 (MAX.)
BNC-R
BNC-R
SIG IN
65.0 0.5
SHIELDED CABLE
WITH 6 CONDUCTIVE
WIRES
6-PIN DIN CONNECTOR
1500
+50
-0
6: GND
4: -15V
5: +15V
3: NC
2: NC
1: NC
EXTERNAL CONDUCTOR: GND
COUNNECTOR
PIN
WIRE
COLOR
CONNEC-
TION
1
2
3
4
5
6
External
Conductor
Red
White
Yellow
Blue
Green
Black
Shield
NC
NC
NC
-15V
+15V
GND
GND
4 s/div.
500 mV/div.
GND
50
LOAD RESISTER
1 ms/div.
500 mV/div.
GND
50
LOAD RESISTER
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