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S8746-01 Datasheet(PDF) 3 Page - Hamamatsu Corporation |
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S8746-01 Datasheet(HTML) 3 Page - Hamamatsu Corporation |
3 / 5 page Si photodioe with preamp S8745-01, S8746-01 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 λp 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- 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. Figure 4 NEP vs. frequency KSPDB0237EA KSPDB0238EA Figure 3 Output noise voltage vs. frequency KSPDB0235EA NEP (f, λ) : NEP at frequency and wavelength to be detected NEP (f, λp): NEP at peak wavelength (See Figures 4) GI-V(f) : Current-to-voltage conversion gain (See Figure 2) Ssi ( λ) : Sensitivity of Si photodiode S ( λ) : Sensitivity of S8745-01 and S8746-01 (See Figure 1.) S ( λp) : Sensitivity of S8745-01 and S8746-01 at peak wavelength, 0.5 V/nW Vn (f) : Output noise voltage (See Figure 3) KSPDB0236EA FREQUENCY (kHz) [Typ. Ta=25 ˚C, Vcc=±15 V, Cf=5 pF (built-in), RL=1 M Ω, dark state] 0.1 0.001 0.01 0.01 0.1 1 10 100 1 1000 100 10 S8745-01 +111 M Ω (EXTERNAL CONNECTED) +11 M Ω (EXTERNAL CONNECTED) +1 M Ω (EXTERNAL CONNECTED) FREQUENCY (kHz) [Typ. Ta=25 ˚C, Vcc=±15 V, Cf=5 pF (built-in), RL=1 M Ω, dark state] 0.1 0.001 0.01 0.01 0.1 1 10 100 1 1000 100 10 S8746-01 +111 M Ω (EXTERNAL CONNECTED) +1 M Ω (EXTERNAL CONNECTED) +11 M Ω (EXTERNAL CONNECTED) FREQUENCY (kHz) [Typ. Ta=25 ˚C, Vcc=±15 V, Cf=5 pF (built-in), RL=1 M Ω, dark state, l=lp] 0.1 0.001 0.01 101 102 103 104 105 106 1 1000 100 10 S8745-01 +111 M Ω (EXTERNAL CONNECTED) +1 M Ω (EXTERNAL CONNECTED) +11 M Ω (EXTERNAL CONNECTED) FREQUENCY (kHz) [Typ. Ta=25 ˚C, Vcc=±15 V, Cf=5 pF (built-in), RL=1 M Ω, dark state, l=lp] 0.1 0.001 0.01 101 102 103 104 105 106 1 1000 100 10 S8746-01 +111 M Ω (EXTERNAL CONNECTED) +1 M Ω (EXTERNAL CONNECTED) +11 M Ω (EXTERNAL CONNECTED) S8745-01 S8746-01 S8745-01 S8746-01 NEP (f, λ) = = ··· (1) Vn (f) GI - V (f) · Ssi ( λ) NEP (f, λp) · S (λp) S ( λ) 3 |
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