The H14121 series are photosensor modules containing a metal package PMT having a GaAsP/GaAs photocathode and a high-voltage power supply circuit. The H14121-40 (GaAsP photocathode) has high sensitivity in the spectral range from 300 nm to 740 nm wavelengths. The H14121-50 (GaAs photocathode) is sensitive along a wide spectral range from 380 nm to 900 nm.
|Parameter||Description / Value||Unit|
|Input voltage||+11.5 to +15.5||V|
|Max. input voltage||+18||V|
|Max. input current *1||12||mA|
|Max. output signal current||2||μA|
|Max. control voltage||+0.9 (Input impedance 30kΩ)||V|
|Recommended control voltage adjustment range||+0.5 to +0.8||V|
|Spectral response||300 to 740||nm|
|Peak quantum efficiency wavelength||520||nm|
|[Cathode] Quantum efficiency||at peak quantum efficiency wavelength||Min.||40||%|
|[Cathode] Radiant sensitivity||at peak quantum efficiency wavelength||Min.||168||mA/W|
|[Anode] Radiant sensitivity *2||at peak quantum efficiency wavelength||Min.||1.0 × 105||A/W|
|Typ.||1.9 × 105||A/W|
|[Anode] Dark current *2 *3||Typ.||3||nA|
|[Anode] Gain *2||Typ.||1.0 × 106||-|
|Rise time *2||Typ.||1.0||ns|
|Ripple noise (peak to peak) *2 *4||Max.||0.6||mV|
|Settling time *5||Typ.||0.2||s|
|Operating ambient temperature *6||+5 to +35||°C|
|Storage temperature *6||-20 to +50||°C|
*1 At ±5 V input voltage and +0.8 V control voltage in darkness
*2 Control voltage = +0.8 V
*3 After 30 minutes storage in darkness
*4 Load resistance = 1 MΩ, Load capacitance = 22 pF
*5 The time required for the output to reach a stable level following a change in the control voltage from +0.9 V to +0.5 V.
*6 No condensation
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