s8745-01 Hamamatsu Photonics, K.K.,, s8745-01 Datasheet - Page 3

• Manufacturer Part Number: s8745-01
• Description: Si Photodiode With Preamp
• Manufacturer: Hamamatsu Photonics, K.K.,

Figure 3 Output noise voltage vs. frequency
NEP (f, ) : NEP at frequency and wavelength to be detected
NEP (f, p): NEP at peak wavelength (See Figures 4)
G
Ssi ( )
S ( )
S ( p)
Vn (f)
Figure 4 NEP vs. frequency
NEP (f, ) =
Output noise voltage and NEP (noise equivalent power) characteristics allow you to check whether the device can detect the low-
level light you want to measure. Since NEP is given by the equation (1) as shown at the right, NEP at wavelengths other than p can
be easily calculated from Figure 1 and Figures 4.
Note) When S8745-01 and S8746-01 are used only with the internal current-to-voltage gain, it is recommended that the "-IN" lead (pin 6 for S8745-
I-V(f)
01; pin 9 for S8746-01) be cut off to a short length in order to reduce the influence of external noise as much as possible.
0.01
100
0.1
10
10
10
10
10
10
10
0.001
1
0.001
: Current-to-voltage conversion gain (See Figure 2)
: Sensitivity of Si photodiode
: Sensitivity of S8745-01 and S8746-01 (See Figure 1.)
: Sensitivity of S8745-01 and S8746-01 at peak wavelength, 0.5 V/nW
: Output noise voltage (See Figure 3)
6
5
4
3
2
1
[Typ. Ta=25 ˚C, Vcc=±15 V, Cf=5 pF (built-in), R
[Typ. Ta=25 ˚C, Vcc=±15 V, Cf=5 pF (built-in), R
G
I - V (f)
S8745-01
0.01
0.01
Vn (f)
· Ssi ( )
+1 M
(EXTERNAL
CONNECTED)
FREQUENCY (kHz)
+11 M
(EXTERNAL
CONNECTED)
FREQUENCY (kHz)
+1 M
(EXTERNAL
CONNECTED)
0.1
+111 M
(EXTERNAL
CONNECTED)
0.1
+111 M
(EXTERNAL
CONNECTED)
S8745-01
S8745-01
+11 M
(EXTERNAL
CONNECTED)
=
1
1
NEP (f, p) · S ( p)
S8745-01
10
10
L
=1 M , dark state,
S ( )
L
=1 M , dark state]
100
Si photodioe with preamp
100
l
=
1000
1000
l
p]
KSPDB0235EA
KSPDB0237EA
··· (1)
0.01
100
10
10
10
10
10
10
0.1
10
0.001
0.001
1
6
5
4
3
2
1
[Typ. Ta=25 ˚C, Vcc=±15 V, Cf=5 pF (built-in), R
[Typ. Ta=25 ˚C, Vcc=±15 V, Cf=5 pF (built-in), R
+11 M
(EXTERNAL
CONNECTED)
S8745-01, S8746-01
S8746-01
0.01
0.01
FREQUENCY (kHz)
FREQUENCY (kHz)
0.1
+111 M
(EXTERNAL
CONNECTED)
0.1
+11 M
(EXTERNAL
CONNECTED)
+1 M
(EXTERNAL
CONNECTED)
+111 M
(EXTERNAL
CONNECTED)
S8746-01
S8746-01
S8746-01
1
1
+1 M
(EXTERNAL
CONNECTED)
10
10
L
=1 M , dark state,
L
=1 M , dark state]
100
100
l
=
1000
1000
l
p]
KSPDB0236EA
KSPDB0238EA
3