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ISL55141IRZ Datasheet(PDF) 5 Page - Intersil Corporation |
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ISL55141IRZ Datasheet(HTML) 5 Page - Intersil Corporation |
5 / 14 page 5 FN6230.4 August 13, 2015 Input Capacitance (Note 11) CIN 2.5 pF DIGITAL OUTPUTS QAX, QBX Output Resistance RoutR 18 27 37 Output Logic High Voltage VOH VOH = 5V, ISOURCE = 1mA 4.9 4.95 5.0 V Output Logic Low Voltage VOL VOL = 0V, ISINK = 1mA 0.00 0.05 0.1 V POWER SUPPLIES, STATIC CONDITIONS Positive Supply DC Current/Comparator ICC No input data +8.25 12.5 mA Negative Supply Current/Comparator IEE No input data -12.5 -8.25 mA Total Power Dissipation/Comparator P (Note 12) Input data at 40MHz 670 mW NOTES: 9. Lab characterization, room temperature, timing parameters matched stimulus/loads, channel-to-channel skew < 500ps, 1ns maximum by design 10. Note about ICC measurement input can approach 140mA (single comparator) at maximum pattern rates 11. Limits should be considered typical and are not production tested. 12. Total Power dissipation per comparator can be approximately calculated from the following: P = (VCC-VEE)*8.25mW + 90pF*(VCC-VEE)^2*f + CL*(VCC-VEE)^2*f, where f is the operating frequency and CL is the load capacitance. Because the ISL55142 has two comparators, the power dissipation would be twice of P calculated from this equation. The ISL55143 would be four times P. 13. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design. Test Circuits and Waveforms FIGURE 2. COMPARATOR PROPAGATION DELAY AND TRANSITION TIME MEASUREMENT POINTS FIGURE 3. THREE-STATE WINDOW COMPARATOR FUNDAMENTALS Electrical Specifications Test Conditions: VCC = 12V, VEE = -3V, VOH = 5V, VOL = 0V, PD = VEE, CLOAD = 15pF, TA = 25°C, unless otherwise specified. (Continued) PARAMETER SYMBOL TEST CONDITIONS MIN (Note 13) TYP MAX (Note 13) UNITS QAX, QBX 400mV 0V tPDLH VOH (VH) VOL (VL) 50% 50% tPDHL VINPX tR tF DATA = 1 DATA = 0 + - + - VINP QA QB CVA 2.4V CVB 0.4V VCC VEE Although there is no electrical difference between the CVA and CVB Inputs, if one defines CVA as being the high threshold and CVB being the low threshold, it becomes easier to understand the utilization of a dual threshold comparator. Essentially this enables the qualification of an incoming signal into three states. In Figure 3, the three states are Valid Low <0.4V, No-man’s-land (between 0.4 and 2.4V), Valid High >2.4V. Table 2 shows how the QA/QB truth table would be utilized in the real world. TABLE 2. QA/QB TRUTH TABLE VINP QA QB COMMENT <0.4V 0 0 Valid 0 >0.4 and <2.4V 0 1 Invalid >2.4V 1 1 Valid 1 ISL55141, ISL55142, ISL55143 |
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