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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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STR720 数据表(PDF) 384 Page - STMicroelectronics |
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STR720 数据表(HTML) 384 Page - STMicroelectronics |
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384 / 401 page  STR720 - ELECTRICAL CHARACTERISTICS 384/401 The electrical characteristics of STR720 oscillator are reported in Table 98. 1. VDD(all) = 1.80 V ± 10%, VDD3(all) = 3.30 V ± 10%, TA = -40 / +85 °C unless otherwise specified. 2. Data based on design characterization done with AEL Crystal (N. 4065), not tested in production Table 97. Crystal oscillator recommanded characteristics Symbol Parameter Conditions Value Unit Min Typ Max fOSCIN Crystal Frequency - 32.678 - kHz fTOL Crystal frequency tolerance -30 - +30 ppm RD Serial drain resistor - 220 - k Ω CG, CD Recommended load capaci- tors versus crystal load capac- itance RD = 220 kΩ CL =9 pF Including board-stray capaci- tances -15 - pF RD = 220 kΩ CL = 12.5 pF Including board-stray capaci- tances -22 - pF Table 98. Oscillator electrical characteristics Symbol Parameter Test Conditions(1) Value Unit Min Typ Max VDDRTC Supply Voltage for PLL 1.71 1.80 1.89 V gm Oscillator Transconductance 14 30 44 µA/V tSETUP Oscillator Start-up Time (2) Stable VDD 400 500 1000 ms Vq Operating point voltage - 956 -mV VOSC Output voltage amplitude(2) CL = 12 pF, RD = 220 kΩ - 788 - mV(rms) ROSC Oscillation allowance(2) CL = 12 pF, RD = 220 kΩ 500 - - k Ω fOFFSET Static frequency deviation ( ∆F/ F)(2) CL = 12 pF, RD = 220 kΩ - +4.0 - ppm |
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