The LM current-feedback amplifier offers an unparalleled combination of bandwidth, slew-rate, and Details, datasheet, quote on part number: LM LM datasheet, LM circuit, LM data sheet: NSC – mA, MHz Current Feedback Amplifier,alldatasheet, datasheet, Datasheet search site for. Download TI technical document LM mA, MHz Current Feedback Amplifier datasheet (Rev. C).
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Documents Flashcards Grammar checker. This represents a radical enhancement in output drive capability for an 8-pin PDIP high-speed amplifier making it ideal for video applications. Pin Configuration and Functions Page numbers for previous revisions may differ from page numbers in the current version. Added, updated, or renamed the following sections: Updated selected plots for readability.
Operating ratings indicate conditions the device is intended to be functional, but device parameter specifications may not be ensured under these conditions. For ensured specifications and test conditions, see the Electrical Characteristics. Human body model pF and 1. Boldface limits apply at the temperature extremes.
All limits ensured at room temperature standard type face or at operating temperature extremes bold face type. Input Voltage Noise vs Frequency Figure Input Current Noise vs Frequency Figure Offset Voltage vs temperature Figure Offset Voltage vs Temperature Figure Transimpedance vs Temperature Figure Quiescent Current vs Temperature Figure Non-inverting Bias Current vs Temperature Figure Absolute Maximum Power Derating: SOIC package Figure In contrast, the current feedback amplifier topology, such as the LM, transcends this limitation to offer a signal bandwidth that is relatively independent of the closed-loop gain.
Therefore, RS and not Rf, must be varied to adjust for the desired closed-loop gain as in Figure It is critical to maintain a wideband low-impedance to ground at the amplifiers supply pins to insure the fidelity of high speed amplifier transient signals.
The bypass capacitors should be placed as close to the amplifier pins as possible 0. Rf Selecting the feedback resistor, Rf, is a dominant factor in compensating the LM Although this value will provide good results for most applications, it may be advantageous to adjust this value slightly. Figure 79 and Figure 80 illustrate the effect of increasing Rf while maintaining the same closed-loop gain—the amplifier bandwidth decreases. Rf continued VOUT 0.
In voltage feedback amplifiers slew rate limiting or non-linear amplifier behavior is dominated by the finite availability of the 1st stage tail current charging the compensation capacitor. The slew rate of current feedback amplifiers, in contrast, is not constant.
Transient current at the inverting input determines slew rate for both inverting and non-inverting gains. The non-inverting configuration slew rate is also determined by input stage limitations. Accordingly, variations of slew rates occur for different circuit topologies.
Although the LM can directly drive as much as pF without oscillating, the resulting response will be a function of the feedback resistor value.
Figure 83 illustrates the small-signal pulse response of the LM while driving a 50 pF load. Ringing persists for approximately 70 ns. Either technique, however, results in lowering the system bandwidth. This compensation serves to reduce the amplifier’s peaking in the frequency domain which equivalently tames the transient response. To limit the bandwidth of current feedback amplifiers, do not use a capacitor across Rf. The dynamic impedance of capacitors in the feedback loop reduces the amplifier’s stability.
Instead, reduced peaking in the frequency response, and bandwidth limiting can be accomplished by adding an RC circuit, as illustrated in Figure Customers should validate and test their design implementation to confirm system functionality. The typical recovery times for open-loop, closed-loop, and input common-mode voltage range overdrive conditions are illustrated in Figure 90, Figure 92, and Figure 93, respectively.
Typical positive and negative overdrive recovery times shown in Figure 90 are 5 ns and 25 ns, respectively. Figure 92 displays the typical 30 ns recovery time to a linear output value. All other trademarks are the property of their respective owners. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
This glossary lists and explains terms, acronyms, and definitions. This vatasheet is the most current data available for the designated devices. This data is subject to change without datashdet and revision of this document.
For browser-based versions of this data sheet, refer to the left-hand navigation. Product device recommended for new designs. TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. Not recommended for new designs.
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Device is in production to support existing customers, but TI does not recommend using this part in a new design. Device has been announced but is not in production.
Samples may or may not be available. TI has discontinued the production of the device. TI’s terms “Lead-Free” or “Pb-Free” mean lm6811 products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
This component has a RoHS exemption for either 1 lead-based flip-chip solder bumps used between the die and package, or 2 lead-based die adhesive used between the die and leadframe.
LM datasheet & applicatoin notes – Datasheet Archive
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LM6181IN/NOPB – Operational Amplifier Single 100 MHz DIL-8, LM6181 – Texas Instruments
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