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OPA2364AIDGKR Datasheet(PDF) 11 Page - Texas Instruments |
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OPA2364AIDGKR Datasheet(HTML) 11 Page - Texas Instruments |
11 / 38 page V OUT R = 10kW P 500 A m OPA363 OPA364 V IN V+ = +5V Op Amp Negative Supply Grounded -V = 5V - (Additional Negative Supply) 5kW OPAx363 10mA max V+ V IN V OUT I OVERLOAD OPA363, OPA2363 OPA364, OPA2364, OPA4364 www.ti.com SBOS259C – SEPTEMBER 2002 – REVISED MAY 2013 INPUT AND ESD PROTECTION All OPA363 and OPA364 pins are static protected with internal ESD protection diodes tied to the supplies. These diodes will provide overdrive protection if the current is externally limited to 10mA, as stated in the absolute maximum ratings and shown in Figure 24. Figure 24. Input Current Protection ACHIEVING OUTPUT SWING TO THE OP AMP’S NEGATIVE RAIL Some applications require an accurate output voltage swing from 0V to a positive full-scale voltage. A good single supply op amp may be able to swing within a few mV of single supply ground, but as the output is driven toward 0V, the output stage of the amplifier will prevent the output from reaching the negative supply rail of the amplifier. The output of the OPA363 or OPA364 can be made to swing to ground, or slightly below, on a single supply power source. To do so requires use of another resistor and an additional, more negative power supply than the op amp’s negative supply. A pulldown resistor may be connected between the output and the additional negative supply to pull the output down below the value that the output would otherwise achieve as shown in Figure 25. Figure 25. OPA363 and OPA364 Swing to Ground This technique will not work with all op amps. The output stage of the OPA363 and OPA364 allows the output voltage to be pulled below that of most op amps, if approximately 500 μA is maintained through the output stage. To calculate the appropriate value load resistor and negative supply, RL = –V/500 μA. The OPA363 and OPA364 have been characterized to perform well under the described conditions, maintaining excellent accuracy down to 0V and as low as –10mV. Limiting and nonlinearity occur below –10mV, with linearity returning as the output is again driven above –10mV. Copyright © 2002–2013, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: OPA363 OPA2363 OPA364 OPA2364 OPA4364 |
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