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ISL43113IBZ データシート(PDF) 7 Page - Intersil Corporation |
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ISL43113IBZ データシート(HTML) 7 Page - Intersil Corporation |
7 / 11 page 7 compatible, TTL compatible versions of these switches, see the ISL43110/11 data sheet. Logic-Level Thresholds Due to the lack of a GND pin, the switching point of the digital input is referenced predominantly to V+. The digital input is CMOS compatible at ±5V supplies, and is TTL compatible for ±3.3V supplies. For other supply combinations refer to Figures 13 and 14. The switching point has a very low temperature sensitivity, and changes by only 100mV from 85°C to -40°C, regardless of supply voltage. High-Frequency Performance In 5 0Ω systems, signal response is reasonably flat to 30MHz, with a -3dB bandwidth of nearly 400MHz (see Figure 15). Figure 15 also illustrates that 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 feedthrough from a switch’s input to its output. OFF Isolation is the resistance to this feedthrough. Figure 16 details the high OFF Isolation provided by this family. At 10MHz, OFF Isolation is about 50dB in 50 Ω systems, decreasing approximately 20dB per decade as frequency increases. Higher load impedances decrease OFF Isolation 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 V-. One of these diodes conducts if any analog signal exceeds V+ or V-. Virtually all the analog leakage current comes from the ESD diodes to V+ or V-. 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 V- 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 V- 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 V-. ISL43112, ISL43113 |
同様の部品番号 - ISL43113IBZ |
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同様の説明 - ISL43113IBZ |
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