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ADCDS-1405 bảng dữ liệu(PDF) 7 Page - Murata Power Solutions Inc. |
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ADCDS-1405 bảng dữ liệu(HTML) 7 Page - Murata Power Solutions Inc. |
7 / 9 page Table 3. Programmable Analog Bandwidth Note: See Figure 11. for timing details Timing The ADCDS-1405 requires two independently operated signals to accurately digitize the analog output signal from the CCD array. • Reference Hold (pin 26) • Start Convert (pin 25) The "Reference Hold" signal controls the operation of an internal sample-hold circuit. A logic "1" places the sample-hold into the hold mode, capturing the value of the CCD's reference Figure 9. ADCDS-1405 Connection Diagram signal. The Reference Hold Signal allows the user to control the exact moment when the sample-hold is placed into the "hold" mode. For optimal performance the sample-hold should be placed into the "hold" mode once the reference signal has fully settled from all switching transients to the desired accuracy (user defined). Once the reference signal has been "held" and the video portion of the CCD's analog output signal appears at the ADCDS-1405's input, the ADCDS-1405's correlated double sampler produces a "CDS Output" signal (see Figure 11.) + + + +12V +5VD –5VA 4.7µF 0.1µF 39 36 38 1 20KΩ +5V –5V 5 4 3 23 22 21 20 19 18 17 16 15 14 13 12 11 10 BIT 1 (MSB) BIT 2 BIT 3 BIT 4 BIT 5 BIT 6 BIT 7 BIT 8 BIT 9 BIT 10 BIT 11 BIT 12 BIT 13 BIT 14 (LSB) 6 24 27 +2.4V REFERENCE OUT OUT-OF-RANGE DATA VALID ADCDS-1405 4.7µF 0.1µF 4.7µF 0.1µF ANALOG GROUND NON-INVERTING INPUT INVERTING INPUT DIRECT INPUT +5VA 36 7, 35, 37 + 4.7µF 0.1µF 26 25 REF. HOLD START CONVERT 2 20KΩ +5V –5V OFFSET ADJUST FINE GAIN ADJUST External Series Resistor 32, 33 DIGITAL GROUND 30 31 A1 A 0.1µF 0.1µF REFERENCE HOLD "AQUISITION TIME" CDS OUTPUT "SETTLING TIME" A0 (Pin 30) A1 (Pin 31) ADCDS-1405 MAX. CONVERSION RATE -3dB BW 70ns 90ns 0 0 5MHz 10.5MHz 100ns 120ns 1 0 3MHz 6.6MHz 200ns 250ns 0 1 2MHz 3.7MHz 450ns 500ns 1 1 1MHz 2.5MHz ADCDS-1405 14-Bit, 5 Megapixels/Second, CCD Signal Processor Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com MDC_ADCDS-1405.B02 Page 7 of 9 |
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Mô tả tương tự - ADCDS-1405 |
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