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OPA2333AIDGKRG4 Datasheet(PDF) 8 Page - Texas Instruments |
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OPA2333AIDGKRG4 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 28 page www.ti.com APPLICATIONS INFORMATION INPUT VOLTAGE 5k W OPA333 10mAmax +5V V IN V OUT I OVERLOAD Current-limitingresistor requiredifinputvoltage exceedssupplyrailsby ³ 0.5V. OPERATING VOLTAGE INTERNAL OFFSET CORRECTION OPA333 OPA2333 SBOS351C – MARCH 2006 – REVISED MAY 2007 The OPA333 and OPA2333 are unity-gain stable and free from unexpected output phase reversal. They use a proprietary auto-calibration technique to The OPA333 and OPA2333 input common-mode provide low offset voltage and very low drift over time voltage range extends 0.1V beyond the supply rails. and temperature. For lowest offset voltage and The OPA333 is designed to cover the full range precision performance, circuit layout and mechanical without the troublesome transition region found in conditions should be optimized. Avoid temperature some other rail-to-rail amplifiers. gradients that create thermoelectric (Seebeck) Normally, input bias current is about 70pA; however, effects in the thermocouple junctions formed from input voltages exceeding the power supplies can connecting dissimilar conductors. These cause excessive current to flow into or out of the thermally-generated potentials can be made to input pins. Momentary voltages greater than the cancel by assuring they are equal on both input power supply can be tolerated if the input current is terminals. Other layout and design considerations limited to 10mA. This limitation is easily include: accomplished with an input resistor, as shown in • Use low thermoelectric-coefficient conditions Figure 18. (avoid dissimilar metals). • Thermally isolate components from power supplies or other heat sources. • Shield op amp and input circuitry from air currents, such as cooling fans. Following these guidelines will reduce the likelihood of junctions being at different temperatures, which can cause thermoelectric voltages of 0.1 μV/ °C or higher, depending on materials used. Figure 18. Input Current Protection The OPA333 and OPA2333 op amps operate over a power-supply range of +1.8V to +5.5V ( ±0.9V to ±2.75V). Supply voltages higher than +7V (absolute maximum) can permanently damage the device. The OPA333 and OPA2333 op amps use an Parameters that vary over supply voltage or auto-calibration technique with a time-continuous temperature are shown in the Typical Characteristics 350kHz op amp in the signal path. This amplifier is section of this data sheet. zero-corrected every 8 μs using a proprietary technique. Upon power-up, the amplifier requires approximately 100 μs to achieve specified VOS accuracy. This design has no aliasing or flicker noise. 8 Submit Documentation Feedback |
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