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EL5211TIYEZ-T7 Datasheet(PDF) 11 Page - Intersil Corporation |
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EL5211TIYEZ-T7 Datasheet(HTML) 11 Page - Intersil Corporation |
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11 / 15 page  EL5211T 11 FN6893.0 May 12, 2010 Applications Information Product Description The EL5211T is a high voltage rail-to-rail input-output amplifier with low power consumption. The EL5211T contains four amplifiers. Each amplifier exhibits beyond the rail input capability, rail-to-rail output capability and is unity gain stable. The EL5211T features a high slew rate of 100V/μs, and fast settling time. Also, the device provides common mode input capability beyond the supply rails, rail-to-rail output capability, and a bandwidth of 60MHz (-3dB). This enables the amplifiers to offer maximum dynamic range at any supply voltage. Operating Voltage, Input and Output Capability The EL5211T can operate on a single supply or dual supply configuration. The EL5211T operating voltage ranges from a minimum of 4.5V to a maximum of 19V. This range allows for a standard 5V (or ±2.5V) supply voltage to dip to -10%, or a standard 18V (or ±9V) to rise by +5.5% without affecting performance or reliability. The input common-mode voltage range of the EL5211T extends 500mV beyond the supply rails. Also, the EL5211T is immune to phase reversal. However, if the common mode input voltage exceeds the supply voltage by more than 0.5V, electrostatic protection diodes in the input stage of the device begin to conduct. Even though phase reversal will not occur, to maintain optimal reliability it is suggested to avoid input overvoltage conditions. Figure 32 shows the input voltage driven 500mV beyond the supply rails and the device output swinging between the supply rails. The EL5211T output typically swings 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 33 shows the input and output waveforms for the device in a unity-gain configuration. Operation is from ±5V supply with a 1kΩ load connected to GND. The input is a 10VP-P sinusoid and the output voltage is approximately 9.9VP-P. Refer to the “Electrical Specifications” Table beginning on page 3 for specific device parameters. Parameter variations with operating voltage, loading and/or temperature are shown in the “Typical Performance Curves” on page 6. Output Current The EL5211T is capable of output short circuit currents of 300mA (source and sink), and the device has built-in protection circuitry which limits the output current to ±300mA (typical). To maintain maximum reliability, the continuous output current should never exceed ±65mA. This ±65mA limit is determined by the characteristics of the internal metal interconnects. Also, see “Power Dissipation” on page 12 for detailed information on ensuring proper device operation and reliability for temperature and load conditions. Unused Amplifiers It is recommended that any unused amplifiers be configured as a unity gain follower. The inverting input should be directly connected to the output and the non-inverting input tied to the ground. Thermal Shutdown The EL5211T has a built-in thermal protection which ensures safe operation and prevents internal damage to the device due to overheating. When the die temperature reaches +165°C (typical), the device automatically shuts OFF the outputs by putting them in a high impedance state. When the die cools by +15°C (typical), the device automatically turns ON the outputs by putting them in a low impedance (normal) operating state. FIGURE 32. OPERATION WITH BEYOND-THE-RAILS INPUT 10μs/DIV VS = ±2.5V, TA = +25°C, AV = 1, VINx = 6VP-P, RL = 1kΩ to GND INPUT OUTPUT FIGURE 33. OPERATION WITH RAIL-TO-RAIL INPUT AND OUTPUT VS = ±5V, TA = +25°C, AV = 1, VINx = 10VP-P, RL = 1kΩ to GND 10μs/DIV |
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