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EL5420CL Datasheet(PDF) 10 Page - Elantec Semiconductor |
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EL5420CL Datasheet(HTML) 10 Page - Elantec Semiconductor |
10 / 13 page 10 EL5220C, EL5420C 12MHz Rail-to-Rail Input-Output Op Amps Applications Information Product Description The EL5220C and EL5420C voltage feedback amplifi- ers are fabricated using a high voltage CMOS process. They exhibit rail-to-rail input and output capability, they are unity gain stable, and have low power consumption (500µA per amplifier). These features make the EL5220C and EL5420C ideal for a wide range of gen- eral-purpose applications. Connected in voltage follower mode and driving a load of 10k Ω and 12pF, the EL5220C and EL5420C have a -3dB bandwidth of 12MHz while maintaining a 10V/µs slew rate. The EL5220C is a dual amplifier while the EL5420C is a quad amplifier. Operating Voltage, Input, and Output The EL5220C and EL5420C 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 EL5220C and EL5420C 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 per- formance curves. The input common-mode voltage range of the EL5220C and EL5420C extends 500mV beyond the supply rails. The output swings of the EL5220C and EL5420C typi- cally extend to within 80mV 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 1 shows the input and output waveforms for the device in the unity-gain configura- tion. 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 1. Operation with Rail-to-Rail Input and Output Short Circuit Current Limit The EL5220C and EL5420C 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 reli- ability is maintained if the output continuous current never exceeds ±30 mA. This limit is set by the design of the internal metal interconnects. Output Phase Reversal The EL5220C and EL5420C are immune to phase rever- sal as long as the input voltage is limited from (VS-) ---- -0.5V to (VS+) +0.5V. Figure 2 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 overvoltage 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. VS=±5V TA=25°C AV=1 VIN=10VP-P |
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