i n n o v a t i o n a n d e x c ell e n c e ? ? ads-ccd1202 12-bit, 2mhz, sampling a/d?s for ccd imaging applications general description the functionally complete, easy-to-use ads-ccd1202 is a 12-bit, 2mhz sampling a/d converter whose performance and production testing have been optimized for use in ccd applications. this device delivers the lowest noise (600vrms) and the best differential linearity error (0.45lsb maximum) of any commercially available 12-bit a/d in its speed class. it can respond to full scale input steps (from empty to full well) with less than a single count of error, and its input is immune to overvoltages that may occur due to blooming. packaged in an industry-standard, 24-pin, ceramic ddip, the ads-ccd1202 requires 15v (or 12v) and +5v supplies and typically consumes 1.75 (1.45) watts. the device is 100% production tested for all critical performance parameters and is fully specified over both the 0 to +70c and ?55 to +125c operating temperature ranges. for those applications using correlated double sampling, the ads-ccd1202 can be supplied without its internal sample- hold amplifier and achieve conversion rates up to 2.5mhz. figure 1. ads-ccd1202 functional block diagram input/output connections pin function pin function 1 bit 12 (lsb) 24 ?12v/?15v suppl y 2 bit 11 23 gr ound 3 bit 10 22 +12v/+15v suppl y 4 bit 9 21 +10v reference out 5 bit 8 20 analog input 6 bit7 19 gr ound 7 bit 6 18 no connect 8 bit 5 17 no connect 9 bit 4 16 st ar t conver t 10 bit 3 15 eoc 11 bit 2 14 gr ound 12 bit 1 (msb) 13 +5v suppl y unipolar input range (0 to +10v) 2mhz sampling rate 4096-to-1 dynamic range (72.2db) low noise, 600vrms (1/4 of an lsb) outstanding differential nonlinearity error (0.45 lsb max.) small, 24-pin ceramic ddip low power, 1.75 watts operates from 12v or 15v supplies edge-triggered, no pipeline delay low cost fea tures datel will also entertain discussions about including the cds circuit internal to the ads-ccd1202. contact us for details. datel, inc. 11 cabot boulevard, mansfield, ma 02048-1151 (u.s.a.) tel: (508) 339-3000 fax: (508)339-6356 for immediate assistance: (800) 233-2765 flash adc ref dac register register digital correction logic 12 bit 1 (msb) 11 bit 2 10 bit 3 9 bit 4 8 bit 5 7 bit 6 6 bit 7 5 bit 8 4 bit 9 3 bit 10 2 bit 11 1 bit 12 (lsb) timing and control logic analog input 20 start convert 16 eoc 15 13 +5v supply 17, 18 no connect 22 +12v/+15v supply 14, 19, 23 ground 24 ?12v/?15v supply s1 s2 s/h buffer ? + +10v reference 21
ads-ccd1202
ads-ccd1202
ads-ccd1202
ads-ccd1202
ads-ccd1202
ads-ccd1202
0.80 max. (20.32) 0.015 (0.381) max. radius for any pin 1.31 max. (33.02) 0.100 typ. (2.540) 0.100 (2.540) 0.190 max. (4.826) 0.040 (1.016) 0.020 typ. (0.508) 0.020 (0.508) 24 13 12 1 pin 1 index 0.130 typ. (3.302) dimension tolerances (unless otherwise indicated): 2 place decimal (.xx) 0.010 (0.254) 3 place decimal (.xxx) 0.005 (0.127) lead material: kovar alloy lead finish: 50 microinches (minimum) gold plating over 100 microinches (nominal) nickel plating 0.060 typ. (1.524) 0.010 typ. (0.254) ads-ccd1202
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