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EL5211AIYEZ Datasheet(PDF) 9 Page - Intersil Corporation |
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EL5211AIYEZ Datasheet(HTML) 9 Page - Intersil Corporation |
9 / 12 page 9 FN6143.2 July 23, 2009 Applications Information Product Description The EL5211A voltage feedback amplifier is fabricated using a high voltage CMOS process. It exhibits rail-to-rail input and output capability, is unity gain stable, and has low power consumption (2.5mA per amplifier). These features make the EL5211A ideal for a wide range of general-purpose applications. Connected in voltage follower mode and driving a load of 1k Ω, the EL5211A has a -3dB bandwidth of 60MHz while maintaining a 75V/µs slew rate. Operating Voltage, Input, and Output The EL5211A is 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 EL5211A 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” on page 4. The input common-mode voltage range of the EL5211A extends 500mV beyond the supply rails. The output swings of the EL5211A typically extend to within 100mV 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 27 shows the input and output waveforms for the device in the unity-gain configuration. Operation is from ±5V supply with a 1k Ω load connected to GND. The input is a 10VP-P sinusoid. The output voltage is approximately 9.8VP-P. Short Circuit Current Limit The EL5211A will limit the short circuit current to ±110mA 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 ±65mA. This limit is set by the design of the internal metal interconnects. Pin Descriptions PIN NUMBER PIN NAME FUNCTION EQUIVALENT CIRCUIT 1 VOUTA Amplifier A output 2 VINA- Amplifier A inverting input 3 VINA+ Amplifier A non-inverting input (Reference Circuit 2) 4 VS- Negative power supply 5 VINB+ Amplifier B non-inverting input (Reference Circuit 2) 6 VINB- Amplifier B inverting input (Reference Circuit 2) 7 VOUTB Amplifier B output (Reference Circuit 1) 8 VS+ Positive power supply VS+ GND VS- CIRCUIT 1 VS+ VS- CIRCUIT 2 5V 5V 10µs FIGURE 27. OPERATION WITH RAIL-TO-RAIL INPUT AND OUTPUT VS = ±5V TA = +25°C AV = 1 VIN = 10VP- EL5211A |
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