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| PRODUCT INFORMATION OPT 0256C Oct/2002 OPT 0256C Stand-Alone UV-VIS Photo Detecting Array with ADC The photo detecting array OPT 0256C represents a new generation of highly accurate optical sensors for integrated solutions. Each photodiode is equipped with its own A/D converter to allow precise synchronous measurements. Exchange of data is done via a standard SPI interface. Thus, a large variety of instructions is possible. The 24-pin devices can be connected to the parallel port of any PC or laptop providing a single-chip solution. Alternatively, standalone solutions can be realized by the integration of microcontrollers or DSPs. The OPT 0256C consists of 256 photodiode channels in a 50-m pitch. Further types with 2...1024 channels and pitches down to 25 m are possible on request. Measurement Features x Broad spectral sensitivity: = 190 nm...950 nm x Highly sensitive measurements, fullscale photo current 2.63 nA typ. @ gain= 3 x 16-bit dynamic range, higher resolution by post-decimating output data x Integration time from 26 s to 12.5 s x Ultra-low noise: 4 LSB @ 75% FS and gain= 0 x Integrated temperature sensor x No cooling necessary x No blooming effect x No memory effect on sudden intensity changes Miscellaneous x Synchronous detection of whole frame x On-chip compensation of fixed pattern noise x Four gain factors for each channel x Excellent UV stability (degradation <1.5x10-9 m2/Ws @ =200 nm) x Current adder for diagnostics x Industry standard package Modes x Continuous mode x External start mode x External start/stop mode x Hold mode Applications x Spectrometry x Pattern recognition x Motion control Evaluation Support x Evaluation board - to be connected to PC or laptop - Windows(c) software PRODUCT INFORMATION OPT 0256C Interfacing Communication and data transfer with an external DSP or PC is achieved by means of a four-wire serial interface (SPI, serial peripheral interface). It is possible to cascade a number of ICs to a single SPI interface. Apart from a few blocking and filtering capacitors, no external analog circuitry is necessary. All internal reference voltages are derived from an on-chip integrated reference voltage source. Oct/2002 Geometrical Characteristics Power Supply Operation of the chip requires two supply voltages: 5 V for the analog part and 3.3 V for the digital part, respectively. Power dissipation is held as low as possible and typically amounts to 130 mW. Symbol NC Parameter Number of channels Pixel height of photodiode Channel pitch Gap between photodiodes Chip length Chip height Value 256 Unit - m m m dH 1600 dP dG 50 5 ldie hdie 14.6 4.1 mm mm System Architecture Temperature Sensor ADC Shift Register The hardware of the OPT 0256C consists of 256 photodiodes each having its own 16-bit ADC, a settable accumulation counter for wide accumulation range, a temperature sensor with ADC, and a digital control block with an SPI-compatible serial interface. Accumulation Counter for Temperature Sens. 255 Photodiode 254 Photodiode . . . 1 Photodiode 0 Photodiode ADC Shift Register ADC Shift Register . . . ADC . . . Shift Register . . . ADC Shift Register gain Control Logic and Serial Interface ADC Clock Generator Biasing and Reference Circuit Accumulation Counter SCLK MOSI MISO PCSENQ DAVQ RESETQ MCLK START_AC VDD Fig. 1: Block diagram of the OPT 0256C All information and data contained in this product information are without any commitment, are not to be considered as an offer for conclusion of a contract, nor shall they be construed as to create any liability. Product or development sample availability and delivery are exclusively subject to our respective order confirmation form. By this publication, Micronas GmbH does not assume responsibility for patent infringements or other rights of third parties which may result from its use. No part of this publication may be reproduced, photocopied, stored on a retrieval system, or transmitted without the express written consent of Micronas GmbH. Edition Oct. 1, 2002; Order No. 6251-581-1PI Micronas GmbH Hans-Bunte-Strasse 19 D-79108 Freiburg (Germany) P.O. Box 840 D-79008 Freiburg (Germany) Tel. +49-761-517-0 Fax +49-761-517-2174 E-mail: docservice@micronas.com www.micronas.com AVDD SVDD Voltage Regulator for Counter/Shifter Cells |
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