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CDP6872 датащи(PDF) 13 Page - Intersil Corporation |
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CDP6872 датащи(HTML) 13 Page - Intersil Corporation |
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13 / 15 page ![]() 13 CDP6872 FIGURE 35. TRANSCONDUCTANCE vs FREQUENCY FIGURE 36. TRANSCONDUCTANCE vs FREQUENCY FIGURE 37. TRANSCONDUCTANCE vs FREQUENCY FIGURE 38. TRANSCONDUCTANCE vs FREQUENCY FIGURE 39. DUTY CYCLE vs RS at 32kHz NOTE: Figure 39 (Duty Cycle vs RS at 32kHz) should only be used for 32kHz crystals. RS may be used at other frequencies to adjust Duty Cycle but experimentation will be required to find an appropriate value. The RS value will be proportional to the effective series resis- tance of the crystal being used. Typical Performance Curves (Continued) 580 540 500 460 420 380 340 300 260 10K 100K 1M 10M 140 150 160 170 180 FREQUENCY (Hz) VDD = 5V, VSS = GND 436.5 µA/V 23 1000pF 1 µF CDP6872 100 Ω 50 Ω 178o 620 F1 = 0, F2 = 0 460 420 380 340 300 260 10K 100K 1M 10M 140 150 160 170 180 FREQUENCY (Hz) 130 VDD = 5V, VSS = GND 311.6 µA/V 23 1000pF 1 µF CDP6872 100 Ω 50 Ω 500 177o F1 = 0, F2 = 1 220 200 180 160 140 120 100 10K 100K 1M 10M 140 150 160 170 180 FREQUENCY (Hz) 130 240 VDD = 5V, VSS = GND 156.7 µA/V 176.6o 23 1000pF 1 µF CDP6872 100 Ω 50 Ω F1 = 1, F2 = 0 15 10 5 0 10K 100K 1M 140 150 160 170 180 FREQUENCY (Hz) 130 120 110 20 VDD = 5V, VSS = GND 6.56 µA/V 23 1000pF 1 µF CDP6872 100 Ω 50 Ω 166o F1 = 1, F2 = 1 0 20 40 60 80 100 120 35 40 45 50 55 60 F1 = F2 = 1, VDD = 5V, CL = 18pF, TA = 25 oC, F OSC = 32.768kHz RS (kΩ) NDK PART # MX-38 EPSON PART # C-001R32.768K-A CDP6872 XTAL 2 OSC IN 3 OSC OUT RS |
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