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EL5423CRZ-T7 Datasheet(PDF) 11 Page - Intersil Corporation |
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EL5423CRZ-T7 Datasheet(HTML) 11 Page - Intersil Corporation |
11 / 12 page 11 FN7176.1 November 19, 2004 Applications Information Product Description The EL5123, EL5223, EL5323, and EL5423 unity gain buffers are fabricated using a high voltage CMOS process. It exhibits rail-to-rail input and output capability and has low power consumption (600µA per buffer). These features make the EL5123, EL5223, EL5323, and EL5423 ideal for a wide range of general-purpose applications. When driving a load of 10k Ω and 12pF, the EL5123, EL5223, EL5323, and EL5423 have a -3dB bandwidth of 12MHz and exhibits 15V/µs slew rate. Operating Voltage, Input, and Output The EL5123, EL5223, EL5323, and EL5423 are specified with a single nominal supply voltage from 5V to 15V or a split supply with its total range from 5V to 15V. Correct operation is guaranteed for a supply range of 4.5V to 16.5V. Most EL5123, EL5223, EL5323, and EL5423 specifications are stable over both the full supply range and operating temperatures of -40°C to +85°C. Parameter variations with operating voltage and/or temperature are shown in the typical performance curves. The output swings of the EL5123, EL5223, EL5323, and EL5423 typically extend to within 50mV of positive and negative supply rails with load currents of 5mA. Decreasing load currents will extend the output voltage range even closer to the supply rails. Figure 24shows the input and output waveforms for the device. Operation is from ±5V supply with a 10k Ω load connected to GND. The input is a 10VP-P sinusoid. The output voltage is approximately 9.985VP-P. FIGURE 24. OPERATION WITH RAIL-TO-RAIL INPUT AND OUTPUT Short Circuit Current Limit The EL5123, EL5223, EL5323, and EL5423 will limit the short circuit current to ±120mA if the output is directly shorted to the positive or the negative supply. If an output is shorted indefinitely, the power dissipation could easily increase such that the device may be damaged. Maximum reliability is maintained if the output continuous current never exceeds ±30mA. This limit is set by the design of the internal metal interconnects. Output Phase Reversal The EL5123, EL5223, EL5323, and EL5423 are immune to phase reversal as long as the input voltage is limited from VS- -0.5V to VS+ +0.5V. Figure 25 shows a photo of the output of the device with the input voltage driven beyond the supply rails. Although the device's output will not change phase, the input's over-voltage should be avoided. If an input voltage exceeds supply voltage by more than 0.6V, electrostatic protection diodes placed in the input stage of the device begin to conduct and over-voltage damage could occur. FIGURE 25. OPERATION WITH BEYOND-THE-RAILS INPUT Power Dissipation With the high-output drive capability of the EL5123, EL5223, EL5323, and EL5423 buffer, it is possible to exceed the 125°C “absolute-maximum junction temperature” under certain load current conditions. Therefore, it is important to calculate the maximum junction temperature for the application to determine if load conditions need to be modified for the buffer to remain in the safe operating area. The maximum power dissipation allowed in a package is determined according to: where: TJMAX = Maximum junction temperature TAMAX = Maximum ambient temperature θJA = Thermal resistance of the package PDMAX = Maximum power dissipation in the package The maximum power dissipation actually produced by an IC is the total quiescent supply current times the total power supply voltage, plus the power in the IC due to the loads, or: 5V 5V 10µs VS=±5V TA=25°C VIN=10VP-P 1V 1V 10µs VS=±2.5V TA=25°C VIN=6VP-P PDMAX TJMAX TAMAX – Θ d JA --------------------------------------------- = PDMAX ΣiV [ S ISMAX VS+ ( VOUTi) ILOADi] × – + × = EL5123, EL5223, EL5323, EL5423 |
Similar Part No. - EL5423CRZ-T7 |
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Similar Description - EL5423CRZ-T7 |
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