S6494

PHOTODIODE www.DataSheet4U.com Photodiode array with amplifier S6493/S6494 series Photodiode arrays combined with a signal processing circuit chip S6493 and S6494 series are Si photodiode arrays efficiently combined with a signal processing circuit. The signal processing circuit is formed on a single chip by the CMOS process, and includes a shift register, clamp circuit, hold circuit and charge amplifier array, thus allowing a simplified external circuit configuration. The photocurrent from the photodiode array is fed to the charge amplifier connected to each element and is converted into a voltage. The signal voltage is then sent to the clamp circuit and hold circuit, and is finally read out from the shift register in turn as a sequential video signal. The signal readout is performed by means of the charge storage method, so the output is proportional to the amount of light exposure (the product of incident light level and integration time). The vide output is a boxcar waveform which is low noise and easy to handle. In addition, the readout gain can be selected from two levels by changing the voltage to the external input terminal. (The "high" gain is 10 times that of the "low" gain.) S6493 and S6494 series ensure easy operation since they can operate from a 5 V supply, and yet offer a maximum data rate of 250 kHz. Features S6493-64: 0.8 mm pitch × 64 ch S6493-128: 0.4 mm pitch × 128 ch S6494-64: 1.6 mm pitch × 64 ch S6494-128: 0.8 mm pitch × 128 ch l Simultaneous integr...