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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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ISL54050IRUZ-T Fiches technique(PDF) 9 Page - Intersil Corporation |
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ISL54050IRUZ-T Fiches technique(HTML) 9 Page - Intersil Corporation |
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9 / 12 page  9 FN6356.2 June 11, 2007 Frequency Performance In 50 Ω systems, the ISL54050 has a -3dB bandwidth of 120MHz (see Figure 22). The frequency response is very consistent over a wide V+ range and for varying analog signal levels. An OFF switch acts like a capacitor and passes higher frequencies with less attenuation, resulting in signal feed through from a switch’s input to its output. Off isolation is the resistance to this feed through, while crosstalk indicates the amount of feed through from one switch to another. Figure 23 details the high off isolation and crosstalk rejection provided by this part. At 100kHz, off isolation is about 62dB in 50 Ω systems, decreasing approximately 20dB per decade as frequency increases. Higher load impedances decrease off isolation and crosstalk rejection due to the voltage divider action of the switch OFF impedance and the load impedance. Leakage Considerations Reverse ESD protection diodes are internally connected between each analog-signal pin and both V+ and GND. One of these diodes conducts if any analog signal exceeds V+ or GND. Virtually all the analog leakage current comes from the ESD diodes to V+ or GND. Although the ESD diodes on a given signal pin are identical and therefore fairly well balanced, they are reverse biased differently. Each is biased by either V+ or GND and the analog signal. This means their leakages will vary as the signal varies. The difference in the two diode leakages to the V+ and GND pins constitutes the analog-signal-path leakage current. All analog leakage current flows between each pin and one of the supply terminals, not to the other switch terminal. This is why both sides of a given switch can show leakage currents of the same or opposite polarity. There is no connection between the analog signal paths and V+ or GND. Typical Performance Curves TA = +25°C, Unless Otherwise Specified FIGURE 10. ON-RESISTANCE vs SUPPLY VOLTAGE vs SWITCH VOLTAGE FIGURE 11. ON-RESISTANCE vs SUPPLY VOLTAGE vs SWITCH VOLTAGE FIGURE 12. ON-RESISTANCE vs SUPPLY VOLTAGE vs SWITCH VOLTAGE FIGURE 13. ON-RESISTANCE vs SWITCH VOLTAGE 01 2345 VCOM (V) ICOM = 100mA 0.25 0.26 0.27 0.28 0.29 0.30 V+ = 4.5V V+ = 4.3V V+ = 3.9V VCOM (V) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 ICOM = 100mA 0.28 0.29 0.30 0.31 0.32 0.33 0.34 0.35 V+ = 3.3V V+ = 3V V+ = 2.7V 0 0.5 1.0 1.5 2.0 VCOM (V) ICOM = 100mA 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 V+ = 2V V+ = 1.65V V+ = 1.8V 01 234 5 VCOM (V) V+ = 4.3V ICOM = 100mA +85°C -40°C +25°C 0.20 0.25 0.30 0.35 ISL54050 |
Numéro de pièce similaire - ISL54050IRUZ-T |
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Description similaire - ISL54050IRUZ-T |
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