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C4675 Datasheet(PDF) 3 Page - Hamamatsu Corporation |
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C4675 Datasheet(HTML) 3 Page - Hamamatsu Corporation |
3 / 4 page 16 × 16 element photodiode array detector C4675 series s Operating principle When light enters a photodiode, photoelectric conversion occurs in the photodiode and the photocurrent Ip is gener- ated. The photocurrent Ip then flows through the current-to- voltage conversion amplifier feedback resistance Rf and is output as voltage V (=Ip × Rf). C4675 series uses current-to-voltage conversion amplifiers connected to each of the 256-element photodiodes to per- form parallel signal processing. A low noise bias circuit is also used to reduce the photodiode junction capacitance. Type No. Feedback resistance Feedback capacitance C4675-102 100 MΩ C4675-302 50 MΩ C4675-103 10 MΩ 1 pF KACCC0001EA s Block diagram LOW NOISE BIAS CIRCUIT +15 V GND -15 V CH 1 CH 2 INCIDENT LIGHT Ip Rf Cf (1p) -15 V GND +15 V CH256 Rf Ip Cf (1p) Rf Ip Cf (1p) - + - + - + s Application example FIBER SPECTRUM RECEPTACLE DATA PROCESSING DEVICE MEMORY SH MUX ADC GAIN AMP AC GAIN AMP CHOPPER l Nerve potential measurement under microscope l 2-D spectrophotometry in visible range l Fine-modulation light measurement LOCK IN AMP C4675-xxx C4675-xxx HAMAMATSU C4675-xxx C4675-xxx HAMAMATSU C4675-xxx C4675-xxx HAMAMATSU KACCC0003EA |
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