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ISL5757EVAL1 Datasheet(PDF) 11 Page - Intersil Corporation |
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ISL5757EVAL1 Datasheet(HTML) 11 Page - Intersil Corporation |
11 / 13 page 11 FN6078.1 November 12, 2004 Propagation Delay The converter requires two clock rising edges for data to be represented at the output. Each rising edge of the clock captures the present data word and outputs the previous data. The propagation delay is therefore 1/CLK, plus <2ns of processing. See Figure 15. Test Service Intersil offers customer-specific testing of converters with a service called Testdrive. To submit a request, fill out the Testdrive form. The form can be found by doing an ‘entire site search’ at www.intersil.com on the words ‘DAC Testdrive’. Or, send a request to the technical support center. FIGURE 13. OUTPUT LOADING FOR DATASHEET MEASUREMENTS PIN 21 PIN 22 RDIFF ISL5757 RLOAD IOUTB IOUTA VOUT = (2 x IOUTA x REQ)V LOAD SEEN BY THE TRANSFORMER RLOAD REPRESENTS THE 1:1 REQ = 0.5 x (RLOAD//RDIFF) AT EACH OUTPUT FIGURE 14. ALTERNATIVE OUTPUT LOADING PIN 21 PIN 22 ISL5757 IOUTB IOUTA VOUT = (2 x IOUTA x REQ)V REQ = 0.5 x (RLOAD//RDIFF//RA), WHERE RA = RB AT EACH OUTPUT RLOAD RDIFF RA RB LOAD SEEN BY THE TRANSFORMER RLOAD REPRESENTS THE Timing Diagram FIGURE 15. PROPAGATION DELAY, SETUP TIME, HOLD TIME AND MINIMUM PULSE WIDTH DIAGRAM CLK IOUT 50% tPW1 tPW2 tSU tHLD tSU tSU tPD tHLD tHLD D9-D0 W0 W1 W2 W3 OUTPUT = W0 OUTPUT = W1 tPD OUTPUT = W-1 ISL5757 |
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