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CA3094BM Scheda tecnica(PDF) 7 Page - Intersil Corporation |
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CA3094BM Scheda tecnica(HTML) 7 Page - Intersil Corporation |
7 / 14 page 3-7 Typical Applications NOTE: In single-ended output operation, the CA3094 may require a pull up or pull down resistor. FIGURE 11A. INVERTING OP AMP FIGURE 11B. NON-INVERTING MODE, AS A FOLLOWER FIGURE 11. APPLICATION OF THE CA3094 FIGURE 12. RC TIMER FIGURE 13. RC TIMER TRIGGERED BY EXTERNAL NEGATIVE PULSE CA3094 - + EIN EOUT (NOTE) Z1 Z2 CA3094 - + EIN EOUT (NOTE) Where EOUT = EIN Where depends on the characteristics of Z1 and Z2 E OU T E IN ----------------- f Z 2 Z 1 ------- = CA3094 2 3 6 4 8 5 7 - + R2 220k Ω R1 100k Ω R A 12V EOUT 2k Ω PULL UP RABC 220k Ω II 1N914 S1 V+ = 18V +18 0 0 2/3V+ VOLTAGE A VOLTAGE AT TERMINAL 8 TIME DELAY (s) = RC (APPROX.) Problem: To calculate the maximum value of R required to switch a 100mA output current comparator Given: II = 500nA at IABC = 100µA (from Figure 3) II = 5µA can be determined by drawing a line on Figure 3 through IABC = 100µA and IB = 500nA parallel to the typical TA = 25 oC curve. Then: II = 33nA at IABC = 5µA † Ratio of II at TA = 25 oC to I I at TA = -55 oC for any given value of IABC I ABC 5 µA, = R ABC 3.6M Ω 18V 5 µA ----------- ≈ = R MAX 18V 12V – 33nA ---------------------------- 180 M Ω at T A 25 o C == = R MAX 180M Ω 23† ⁄ × 120M Ω at T A 55 o C – == = C CA3094 3 2 4 5 7 8 - + R3 1M Ω R1 1M Ω 6 R2 2.2M Ω RLOAD 2k Ω C1 0.5 µF EOUT E 100 270 100 k Ω 100 k Ω 100 k Ω k Ω k Ω INPUT A 12VDC 0.01 µF B C V+ 220k Ω On a negative going transient at input (A), a negative pulse at C will turn “on” the CA3094, and the output (E) will go from a low to a high level. At the end of the time constant determined by C1, R1, R2, R3, the CA3094 will return to the “off” state and the output will be pulled low by RLOAD. This condition will be independent of the interval when input (A) returns to a high level. V+ 0 0 0 0 0 V+ 3/ 4V+ A B C D E D 1N914 CA3094, CA3094A, CA3094B |
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