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ISL54051_0709 Folha de dados(PDF) 6 Page - Intersil Corporation |
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ISL54051_0709 Folha de dados(HTML) 6 Page - Intersil Corporation |
6 / 10 page 6 FN6459.2 September 25, 2007 Detailed Description The ISL54051 and ISL54052 are bidirectional, single pole/single throw (SPST) analog switches. They offer precise switching capability from a single 1.8V to 5.5V supply with low ON-resistance and high speed operation. With a single supply of 5V the typical ON-resistance is only 0.8 Ω, with a typical turn-on and turn-off time of: tON = 24ns, tOFF = 10ns. The devices are especially well suited for portable battery powered equipment due to their low operating supply voltage (1.8V), low power consumption (5.5 μW), low leakage currents (300nA max) and tiny μTDFN package. The ISL54051 is a single normally open (NO) SPST analog switch. The ISL54052 is a single normally closed (NC) SPST analog switch. Supply Sequencing and Overvoltage Protection With any CMOS device, proper power supply sequencing is required to protect the device from excessive input currents, which might permanently damage the IC. All I/O pins contain ESD protection diodes from the pin to V+ and to GND (see Figure 6). To prevent forward biasing these diodes, V+ must be applied before any input signals, and the input signal voltages must remain between V+ and GND. If these conditions cannot be guaranteed, then one of the following two protection methods should be employed. Logic inputs can easily be protected by adding a 1k Ω resistor in series with the input (see Figure 6). The resistor limits the input current below the threshold that produces permanent damage, and the sub-microamp input current produces an insignificant voltage drop during normal operation. FIGURE 3. OFF ISOLATION TEST CIRCUIT FIGURE 4. rON TEST CIRCUIT FIGURE 5. CAPACITANCE TEST CIRCUIT Test Circuits and Waveforms (Continued) ANALYZER RL SIGNAL GENERATOR V+ C 0V OR V+ NO or NC COM IN GND V+ C VINL OR VINH NO or NC COM IN GND VNX V1 rON = V1/100mA 100mA V+ C GND NO OR NC COM IN IMPEDANCE ANALYZER VINL OR VINH ISL54051, ISL54052 |
Nº de peça semelhante - ISL54051_0709 |
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Descrição semelhante - ISL54051_0709 |
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