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OPA4348AQPWRQ1 Datasheet(PDF) 8 Page - Texas Instruments |
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OPA4348AQPWRQ1 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 18 page –0.5 Common-Mode Voltage (V) OFFSET VOLTAGE vs FULL COMMON-MODE VOLTAGE RANGE 0 V– 0.5 1.5 1 2.5 2 3.5 3 4.5 5 4 5.5 2 1.5 1 0.5 0 –0.5 –1 –1.5 –2 V+ 5V 0V G = +1V/V, V S = +5V 10µs/div V IN V OUT 5kW 1/2 OPA2348 10mA max +5V V IN V OUT I OVERLOAD OPA2348-Q1 OPA4348-Q1 SBOS465A – JANUARY 2009 – REVISED MARCH 2010 www.ti.com Figure 2. Behavior of Typical Transition Region at Room Temperature Rail-to-Rail Input The input common-mode range extends from (V–) – 0.2 V to (V+) + 0.2 V. For normal operation, inputs should be limited to this range. The absolute maximum input voltage is 500 mV beyond the supplies. Inputs greater than the input common-mode range but less than the maximum input voltage, while not valid, do not cause any damage to the op amp. Unlike some other op amps, if input current is limited the inputs may go beyond the power supplies without phase inversion, as shown in Figure 3. Figure 3. No Phase Inversion With Inputs Greater Than Power-Supply Voltage Normally, input currents are 0.5 pA. However, large inputs (greater than 500 mV beyond the supply rails) can cause excessive current to flow in or out of the input pins. Therefore, as well as keeping the input voltage below the maximum rating, it is also important to limit the input current to less than 10 mA. This is easily accomplished with an input voltage resistor, as shown in Figure 4. Figure 4. Input Current Protection for Voltages Exceeding the Supply Voltage 8 Submit Documentation Feedback Copyright © 2009–2010, Texas Instruments Incorporated Product Folder Link(s): OPA2348-Q1 OPA4348-Q1 |
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