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ISL43841 Datasheet(PDF) 10 Page - Intersil Corporation |
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ISL43841 Datasheet(HTML) 10 Page - Intersil Corporation |
10 / 14 page 10 Detailed Description The ISL43841 analog switch offers a precise switching capability from a bipolar ±2V to ±6V or a single 2V to 12V supply with low on-resistance (39 Ω) and high speed operation (tON = 38ns, tOFF = 19ns) with dual 5V supplies. It has an latch bar pin to lock in the last switch address. The device is especially well suited for applications using ±5V supplies. With ±5V supplies the performance (RON, Leakage, Charge Injection, ect.) is best in class. High frequency applications also benefit from the wide bandwidth, and the very high off isolation and crosstalk rejection. 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 V+(see Figure 9). To prevent forward biasing these diodes, V+ and V- must be applied before any input signals, and input signal voltages must remain between V+ and V-. 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 9). 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 5. OFF ISOLATION TEST CIRCUIT FIGURE 6. RON TEST CIRCUIT FIGURE 7. CROSSTALK TEST CIRCUIT FIGURE 8. CAPACITANCE TEST CIRCUIT Test Circuits and Waveforms (Continued) ANALYZER RL SIGNAL GENERATOR 0V or V+ NOX COMX ADDX GND V- C V+ C LATCH 0V or V+ NOX COMX ADDX GND VNX V1 RON = V1/1mA 1mA V- C V+ C LATCH 0V or V+ ANALYZER NOA SIGNAL GENERATOR RL GND ADDX 50 Ω N.C. COMB NOB V- C V+ C COMA LATCH GND NOX COMX ADDX IMPEDANCE ANALYZER 0V or V+ V- C V+ C LATCH ISL43841 |
Similar Part No. - ISL43841_04 |
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Similar Description - ISL43841_04 |
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