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RL0512P Datasheet(PDF) 5 Page - PerkinElmer Optoelectronics |
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RL0512P Datasheet(HTML) 5 Page - PerkinElmer Optoelectronics |
5 / 8 page condition is not satisfied. Figure 4 details the clock waveform require- ments and overlap tolerances. The video amplifier buffers the signal from the integrator for output from the imager. Care must be taken to keep the load on this amplifier within its ability to drive highly reactive or low imped- ance loads. The half power bandwidth into an external load of 10 pF is 150 MHz. It is recommended that the output video signal be buffered with a wide bandwidth emitter follower or other appropriate amplifier to provide a large ZIN to the output amplifier. Keep the external amplifier close to the output pins to minimize stray inductive and capacitive coupling of the output signal that can harm signal quality. Exposure Control and Antiblooming An exposure control feature in the P-series imagers supports variable charge accumulation time in the photo- diode. When the antiblooming gate voltage ( øAB) is set to its high state, charge is drained from the pixel storage gate to the exposure control drain. During normal charge collection in the photodiode, øAB is set to its low state. Due to the timing requirements of the exposure control mode, charge is always accumulated at the end of the period just before the charge is transferred to the readout register. Figure 3 includes the timing require- ments for exposure control with the antiblooming gate. The exposure control timing shown will act on the charge packets that emerge as video data on the next readout cycle. Signal Function State Voltage Tolerance ø 1 , ø2 Horizontal Clocks High 5 ±5% Low 0 ø TG Transfer Gate High 8 ±10% Low 0 ø PG Photo Gate High 8 ±5% Low -4 ø AB Antiblooming Gate High 4 ±5% Low -4 VOG Output Gate 3 ±5% ø RG Reset Gate High 8 ±10% Low 0 VDD Amplifier Voltage Supply 12 ±5% VRD Amplifier Reset Drain 9.5 ±5% VRD/LS Amplifier Return / Light Shield 0 Table 4. Operating Voltages Min Max Units Tempera emperature ture Storage -25 +85 °C Operating -25 +55 °C V olta oltage ge (with (with respect respect to to GND) GND) Pins 3, 4, 17 - 19 -0.3 +18 V Pins 2, 10, 20 -0.3 +18 V Pins 1, 11 -0.3 + 0 V Pins 15, 16 -4.3 +18 V Table 5. Absolute Maximum Rating Above Which Useful Life May Be Impaired Linear Photodiode Array Imagers www.perkinelmer.com/opto Imager Performance In P-series images each element per- forms its own function admirably while integrating smoothly with the other elements on the team. The pho- todiodes efficiently transform light to charge, the readout registers accu- rately transport the charge to the amplifier, and the amplifier delivers Output Amplifier (cont.) a clean, robust signal for use in image processing electronics. While the actual performance of these imagers depends strongly on the details of the electronics and timing the camera provides, their straight- forward implementation require- ments facilitate optimum designs. Precautionary Note: The CCD output pin (Pin #2) must never be shorted to either V SS or VDD while power is applied to the device. Catastrophic device failure will result! DSP-101 01H - 7/2002W Page 5 |
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