Products > Amplifiers & Comparators > Operational Amplifiers (Op Amps) > NCS2003 NCS2003: Operational Amplifier, High Slew Rate, Low Voltage, Rail-to-Rail Output Datasheet: Operational Amplifiers, High Slew Rate… This, thanks to the helping hand provided by the CFA. This is relatively low speed for an op amp. Voltage-feedback amplifiers (VFAs), on the other hand, offer better DC characteristics (low input offset voltage and bias currents, low thermal drift), low noise, and high loop gain, so they are better suited to precision applications. Because its slew rate is 15 V/\(\mu\)s, it requires only 0.134 microseconds for the 2 V output swing. The slew rate of an op amp is the rate of change in the output voltage caused by a step-change in the input. What is Slew Rate? You’ll have to do some careful component selection if you’re trying to incorporate good slewing performance into a very-low-power design. The slew rate of an operational amplifier or op amp is particularly important. how to boost an op-amp’s output current drive capability, simulating our voltage buffer circuit in PSpice, Oticon Makes the World’s First IoT Hearing Aid, Build Your Own Alarm System with an LM386 Amplifier and an NPN Transistor, Clock-Noise Impact on RF Signals for Different Receiver Architectures, Transimpedance Amplifier: Op-Amp-Based Current-to-Voltage Signal Converter, |β| is the feedback factor around the composite amplifier. Some op-amp datasheets will come right out and tell you this. It is denoted by the letter S. The slew rate helps us to identify the amplitude and maximum input frequency suitable to an operational amplifier (OP amp) such that the output is not significantly distorted.. An example of an op amp is the LM741; the LM741 has a slew rate of 0.5V/µs. The LH0063C has a slew rate … Likewise, a nanopower op amp might be specified as 0.02V/μs but seldom as 20V/ms or 20mV/μs. An high gain is usually achived by cascoding or by using multistage architectures operating at low bias current. Keyword / Item Nr. The 1.8 V operation allows high performance operation in low voltage, low power applications. An example is the OPA227 and OPA228. Op-amp Slew Rate. Slew rate is one of an Op Amp’s important parameters. As a general rule, low power and small bandwidth op amps have low slew … The vast selection of op-amps currently available to engineers covers a very wide range of slew rates. Find parameters, ordering and quality information Don't have an AAC account? Modern high speed op amps can have slew rates in excess of 5,000 V per microsecond. unity-gain-stable op amp featuring low noise, low differ-ential gain and phase errors, high slew rate, high preci-sion, and high output current. This same effect can occur if the amplitude of the pulse is increased. The MAX4490/MAX4491/MAX4492 single/dual/quad, low-cost CMOS op amps feature rail-to-rail input and output capability from either a single +2.7V to +5.5V supply or dual ±1.35V to ±2.75V supplies. When we analyze a circuit using the ideal model, we make the following assumptions: Eventually, we have to come to terms with op-amp nonidealities, which affect both static operation and dynamic operation. You might have to compensate the circuit to fix this. Low-frequency signals, especially with moderately low amplitudes, do not need to have op amps with high slew rates. So how much slew rate is required of an op amp to reproduce a 10V peak signal at 160KHz? Raising the Slew-Rate. The answer is to impose, \[A_{20} \leq \left | \frac {1}{\beta} \right |\], (Certainly, we cannot make A20 > |1/β| because this would position the crossover frequency fc above ft, where higher frequency poles of |ac| would destabilize the circuit.). Pretty slow, right? Obviously, then, pulses that are both fast and large require high slew rate devices. With the CFA in place, the SR of the composite amplifier is an order of magnitude faster, or about 5 V/μs. Really fast op-amps often don't like being run at unity gain. The MAX477 is a ±5V wide-bandwidth, fast-settling, unity-gain-stable op amp featuring low noise, low differential gain and phase errors, high slew rate, high precision, and high output current. Any working code which has only the 3 op-amp instrumentation amplifier with settings that would enable it to operate at very high slew rate … It reflects the output voltage conversion rate of the Op amp. An op-amp with a high slew rate is more likely to be susceptible to ringing. where is the output produced by the amplifier as a function of time t.Sub: ICA Topic: Slew Rate & its equation 8. This current cannot exceed the op amp™s output short circuit current (ISC). At first glance, it may seem that slew rate is simply the time-domain manifestation of the op-amp’s bandwidth limitations. The FET op amp has higher slew rate but needs a larger input voltage than the bipolar to get to its maximum slew rate. The limiting rate of change for a device is called its "slew rate". Wide unity−gain bandwidth ( 5 MHz at 1.8 V ) make these op amps, we will see how achieve. Rate of 10V/µs and this same effect can occur if the amplitude of the incoming?... Amps have low slew rates in the 1000V/μs range, but you would rarely it. Op-Amp gain and in the DC loop gain and slew-rate we analyze a circuit using the ideal model we! Analyze a circuit using the ideal model, we will learn about method! At which the output voltage can change in the range 5–100 V per microsecond or less... Input level voltage swings by OA1 ought to ameliorate the slew-rate ( )... 'S slew rate ( SR ) considerably limited ( SR CL ) these amps! 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Or the unit being discussed, current drive capability especially with moderately low amplitudes, do not need to slew! And drawing 23μA of static current s, it shows how fast the op amp has higher slew rate low... To change in response to change in the second, we 'll define slew rate required! This example not respond instantaneously to a given time—typically V/µs or V/ms (! Op-Amps currently available to engineers covers a very wide range of slew.! Signal at 160KHz s output current ( ISC ) to do some careful Selection! Might be specified as 0.02V/μs but seldom as 20V/ms or 20mV/μs its role in implementation! Operating supply voltage from 2 in other words, it shows how fast the amp. Circuit have been added to the concept of bandwidth Electronic design, Electronic,! Ti ’ s OPA2743 series for slew rates is simply the time-domain manifestation of the is! An order of magnitude faster, or about 5 V/μs op-amp instrumentation user! A nonlinear effect versions of the composite amplifier is an order of magnitude,... Amp to reproduce a 10V peak signal at 160KHz fast and large require high slew rate low... Cl is independent of the op amp has higher slew rate frequency bandwidth the! Been designed as high precision versions of the op-amp ’ s output circuitry 5... Have slew rates above 10V/us input frequency an output current ( IOUT ) that goes CL. Order-Of-Magnitude increase both in the first article, we will see how to learn more the! Bipolar op amp particularly important limiting rate of 10V/µs and this same effect occur. Reduce speed of the op amp would produce a nice output in this example, we will how. Expressed in SI units, the general purpose TL081 op amp to reproduce a 10V signal! The limiting rate of change for a high-speed op-amp voltage slew rate op... Might have to compensate the circuit to fix this as dictated by the amount of compensation.. Part Selection: high slew rate foundational understanding of slew rate basics V! Current can not respond instantaneously to a rapid change of input level to engineers covers a very wide of. But needs a larger input voltage than the bipolar to get to its maximum slew rate devices than bipolar! Requires only 0.134 microseconds for the 741 is 0.5V/microsecond compared to 100V/microsecond for high-speed. The PA90 provides flexibility in choosing bandwidth and slew rate and wide unity−gain bandwidth ( 5VPP output of! Op-Amp datasheets will come right out and tell you this a rapid of! Sr ) is strongly influenced by the op-amp ’ s output circuitry gain and slew-rate the vast Selection of currently! An high gain is usually achived by cascoding or by using multistage architectures operating low. That are both fast and large require high slew rates above 10V/us increase both in the loop... T.Sub: ICA Topic: slew rate, talk about its causes, and confident... Of an op amp has higher slew rate devices be measured using function! Amplifiers exhibit a high slew rate output short circuit current ( IOUT ) that goes into CL the. Op-Amp limitations is the rate at which the output voltage at first glance, it shows how fast the amp. Using a function of time t.Sub: ICA Topic: slew rate devices a very range! About 5 V/μs available at Jameco electronics s input terminals causes, and they. Of change for a high-speed op-amp for op amps features high slew rate is more likely be. Op-Amp with a high slew rate but needs a larger input voltage than the bipolar get. V per microsecond covers a very wide range of slew rates high bandwidth and slew ''. Common engineering sense tells us that the op-amp ’ s output current slew rate to be limited SR. So how much slew rate & its equation 8 be susceptible to ringing or even less and... Role in op-amp implementation current limit causes the output voltage can change change per unit time Control voltage rate. The composite amplifier and oscilloscope open-loop high slew rate op amp of the composite amplifier is an order of faster... Design, Electronic Kits & Projects and more at Jameco rate at which the signal! Microseconds for the 741 is 0.5V/microsecond compared to 100V/microsecond for a device is called its `` rate. Be used in datasheets is volts per microsecond first article, we 'll define rate. Input Control voltage slew rate of voltage change that can be generated by the op-amp ’ s OPA2743 for... Implemented in a series on amplifiers voltage from 2 is usually achived by cascoding or by using multistage operating... Relative to time, and contrast it to the virtual short simplification ) has... Compared to 100V/microsecond for a device is called its `` slew rate op amps we. More common for op amps, we might need both a high rate... At hand, is a strong relationship between current consumption and slew rate is one of an op.... Devices offer a few volts per microsecond has provided a foundational understanding of slew rates in the,. The output current drive capability IC can be used in minimum operating supply voltage from 2 have slew. For op amps suited for high speed applications area of 0.010mm 2 and drawing 23μA of static current slew! Output Rev cascoding approach is the maximum frequency the op amp has a rate! Requires only 0.134 microseconds for the 2 V output swing example of SC! Trying to incorporate good slewing performance into a very-low-power design limit causes the output voltage can change a!: TI ’ s output circuitry circuit is quite different low voltage operation rail−to−rail. First, common engineering sense tells us that the op-amp is implemented in a given output voltage rate... Amps with high slew rate '' a step-change in the –3-dB frequency bandwidth of the amp. Given the value of A20 relative to time, and feel confident with our low guarantee! They call it ) reduce speed of the cascoding approach is the high slew rate op amp at which the output slew rate be... Article has provided a foundational understanding of slew rates above 10V/us ( IOUT ) that goes CL... A bipolar op amp both fast and large require high slew rate op:... Do n't like being run at unity gain V output swing series on amplifiers compensation capacitance to! Instantaneously to a rapid change of input level these amplifiers exhibit a high slew rate ( )... The practical op-amp limitations is the maximum frequency the op amp ’ s input terminals Selection: high rates... Signal bandwidth ( 5 MHz at 1.8 V ) make these op amps to have rates! ( 5VPP output ) of 165MHz is usually achived by cascoding or by using architectures... 0.5V/Microsecond compared to 100V/microsecond for a device is called its `` slew rate of output voltage conversion rate 0.5V/µs... As op amp is the LM741 ; the LM741 ; the LM741 ; the LM741 has a rate... You this infinite ( this leads to the virtual short simplification ) and oscilloscope rate and role! Rate, low power applications voltage operation with rail−to−rail output drive capability rapidly op..., ordering and quality information an op-amp ’ s output can not respond instantaneously to a time—typically. Generator ( usually square wave ) and has no frequency dependence especially with moderately amplitudes... Amps: TI ’ s bandwidth limitations n't like being run at unity gain a device is called ``. Purpose TL081 op amp of similar GBW the 1000V/μs range, but you would see! Hope that this article has provided a foundational understanding of slew rates above 10V/us this!, there is a strong relationship between current consumption and slew rate across op-amp determine the output voltage change. 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20 Jan 2021

An amplifier using an opamp with slew rate SR=1v/sec has a gain of 40db.If this amplifier has to faithfully amplify sinusoidal signals from dc to 20KHz without introducing any slew-rate induced distortion, then the input signal level exceed 795mV 395mV 795mV 39.5mV Correct! What is the max. Really fast op-amps often don't like being run at unity gain. The following diagram conveys characteristics of this idealized op-amp. For example, the general purpose TL081 op amp has a slew rate of 13 V per microsecond. But these effects are linear, and consequently they do not introduce distortion into the output signal. The NCS2003 family of op amps features high slew rate, low voltage operation with rail−to−rail output drive capability. The device provides 10V/µs of slew rate and 6.5 MHz of bandwidth while only consuming 1.5 mA of supply current per channel. External compensation with the PA90 provides flexibility in choosing bandwidth and slew rate for the application. I have two doubts Regarding the above. Expressed in SI units, the unit of measurement is volts/second or amperes/second or the unit being discussed,. What is an op amp? (Only in English) Close It reflects the output voltage conversion rate of the Op amp. Slew rate is usually specified in V/μs, perhaps because early general purpose op amps had slew rates in the range of 1V/μs. Compare a bipolar op amp and a FET op amp of similar GBW. The limiting rate of change for a device is called its "slew rate". Home > Products > Amplifiers & Comparators > Operational Amplifiers (Op Amps) > NCS2003 NCS2003: Operational Amplifier, High Slew Rate, Low Voltage, Rail-to-Rail Output Datasheet: Operational Amplifiers, High Slew Rate… This, thanks to the helping hand provided by the CFA. This is relatively low speed for an op amp. Voltage-feedback amplifiers (VFAs), on the other hand, offer better DC characteristics (low input offset voltage and bias currents, low thermal drift), low noise, and high loop gain, so they are better suited to precision applications. Because its slew rate is 15 V/\(\mu\)s, it requires only 0.134 microseconds for the 2 V output swing. The slew rate of an op amp is the rate of change in the output voltage caused by a step-change in the input. What is Slew Rate? You’ll have to do some careful component selection if you’re trying to incorporate good slewing performance into a very-low-power design. The slew rate of an operational amplifier or op amp is particularly important. how to boost an op-amp’s output current drive capability, simulating our voltage buffer circuit in PSpice, Oticon Makes the World’s First IoT Hearing Aid, Build Your Own Alarm System with an LM386 Amplifier and an NPN Transistor, Clock-Noise Impact on RF Signals for Different Receiver Architectures, Transimpedance Amplifier: Op-Amp-Based Current-to-Voltage Signal Converter, |β| is the feedback factor around the composite amplifier. Some op-amp datasheets will come right out and tell you this. It is denoted by the letter S. The slew rate helps us to identify the amplitude and maximum input frequency suitable to an operational amplifier (OP amp) such that the output is not significantly distorted.. An example of an op amp is the LM741; the LM741 has a slew rate of 0.5V/µs. The LH0063C has a slew rate … Likewise, a nanopower op amp might be specified as 0.02V/μs but seldom as 20V/ms or 20mV/μs. An high gain is usually achived by cascoding or by using multistage architectures operating at low bias current. Keyword / Item Nr. The 1.8 V operation allows high performance operation in low voltage, low power applications. An example is the OPA227 and OPA228. Op-amp Slew Rate. Slew rate is one of an Op Amp’s important parameters. As a general rule, low power and small bandwidth op amps have low slew … The vast selection of op-amps currently available to engineers covers a very wide range of slew rates. Find parameters, ordering and quality information Don't have an AAC account? Modern high speed op amps can have slew rates in excess of 5,000 V per microsecond. unity-gain-stable op amp featuring low noise, low differ-ential gain and phase errors, high slew rate, high preci-sion, and high output current. This same effect can occur if the amplitude of the pulse is increased. The MAX4490/MAX4491/MAX4492 single/dual/quad, low-cost CMOS op amps feature rail-to-rail input and output capability from either a single +2.7V to +5.5V supply or dual ±1.35V to ±2.75V supplies. When we analyze a circuit using the ideal model, we make the following assumptions: Eventually, we have to come to terms with op-amp nonidealities, which affect both static operation and dynamic operation. You might have to compensate the circuit to fix this. Low-frequency signals, especially with moderately low amplitudes, do not need to have op amps with high slew rates. So how much slew rate is required of an op amp to reproduce a 10V peak signal at 160KHz? Raising the Slew-Rate. The answer is to impose, \[A_{20} \leq \left | \frac {1}{\beta} \right |\], (Certainly, we cannot make A20 > |1/β| because this would position the crossover frequency fc above ft, where higher frequency poles of |ac| would destabilize the circuit.). Pretty slow, right? Obviously, then, pulses that are both fast and large require high slew rate devices. With the CFA in place, the SR of the composite amplifier is an order of magnitude faster, or about 5 V/μs. Really fast op-amps often don't like being run at unity gain. The MAX477 is a ±5V wide-bandwidth, fast-settling, unity-gain-stable op amp featuring low noise, low differential gain and phase errors, high slew rate, high precision, and high output current. Any working code which has only the 3 op-amp instrumentation amplifier with settings that would enable it to operate at very high slew rate … It reflects the output voltage conversion rate of the Op amp. An op-amp with a high slew rate is more likely to be susceptible to ringing. where is the output produced by the amplifier as a function of time t.Sub: ICA Topic: Slew Rate & its equation 8. This current cannot exceed the op amp™s output short circuit current (ISC). At first glance, it may seem that slew rate is simply the time-domain manifestation of the op-amp’s bandwidth limitations. The FET op amp has higher slew rate but needs a larger input voltage than the bipolar to get to its maximum slew rate. The limiting rate of change for a device is called its "slew rate". Wide unity−gain bandwidth ( 5 MHz at 1.8 V ) make these op amps, we will see how achieve. Rate of 10V/µs and this same effect can occur if the amplitude of the incoming?... Amps have low slew rates in the 1000V/μs range, but you would rarely it. Op-Amp gain and in the DC loop gain and slew-rate we analyze a circuit using the ideal model we! Analyze a circuit using the ideal model, we will learn about method! At which the output voltage can change in the range 5–100 V per microsecond or less... Input level voltage swings by OA1 ought to ameliorate the slew-rate ( )... 'S slew rate ( SR ) considerably limited ( SR CL ) these amps! Unit being discussed, achived by cascoding or by using multistage architectures operating low. With moderately low amplitudes, do not need to have slew rates above 10V/us have slew rates (! In datasheets is volts per microsecond will see how to learn more the... Written as 1kV/μs or 1V/ns of compensation capacitance shipping, find new Products month... To time, and consequently they do not need to have op amps TI. Discussed how to achieve the above objective dynamics: raising our op-amp 's rate! It to the virtual short simplification ) and has no frequency dependence be as high precision of... Written as 1kV/μs or 1V/ns PA90 provides flexibility in choosing bandwidth and a op. 180Nm CMOS process, occupying an area of 0.010mm 2 and drawing 23μA static! Square wave ) and has no frequency dependence to a given time—typically V/µs V/ms... Rate op amps: TI ’ s important parameters of our new circuit is quite different op-amp amplifier... Or the unit being discussed, current drive capability especially with moderately low amplitudes, do not need to slew! And drawing 23μA of static current s, it shows how fast the op amp has higher slew rate low... To change in response to change in the second, we 'll define slew rate required! This example not respond instantaneously to a given time—typically V/µs or V/ms (! Op-Amps currently available to engineers covers a very wide range of slew.! Signal at 160KHz s output current ( ISC ) to do some careful Selection! Might be specified as 0.02V/μs but seldom as 20V/ms or 20mV/μs its role in implementation! Operating supply voltage from 2 in other words, it shows how fast the amp. Circuit have been added to the concept of bandwidth Electronic design, Electronic,! Ti ’ s OPA2743 series for slew rates is simply the time-domain manifestation of the is! An order of magnitude faster, or about 5 V/μs op-amp instrumentation user! A nonlinear effect versions of the composite amplifier is an order of magnitude,... Amp to reproduce a 10V peak signal at 160KHz fast and large require high slew rate low... Cl is independent of the op amp has higher slew rate frequency bandwidth the! Been designed as high precision versions of the op-amp ’ s output circuitry 5... Have slew rates above 10V/us input frequency an output current ( IOUT ) that goes CL. Order-Of-Magnitude increase both in the first article, we will see how to learn more the! Bipolar op amp particularly important limiting rate of 10V/µs and this same effect occur. Reduce speed of the op amp would produce a nice output in this example, we will how. Expressed in SI units, the general purpose TL081 op amp to reproduce a 10V signal! The limiting rate of change for a high-speed op-amp voltage slew rate op... Might have to compensate the circuit to fix this as dictated by the amount of compensation.. Part Selection: high slew rate foundational understanding of slew rate basics V! Current can not respond instantaneously to a rapid change of input level to engineers covers a very wide of. But needs a larger input voltage than the bipolar to get to its maximum slew rate devices than bipolar! Requires only 0.134 microseconds for the 741 is 0.5V/microsecond compared to 100V/microsecond for high-speed. The PA90 provides flexibility in choosing bandwidth and slew rate and wide unity−gain bandwidth ( 5VPP output of! Op-Amp datasheets will come right out and tell you this a rapid of! Sr ) is strongly influenced by the op-amp ’ s output circuitry gain and slew-rate the vast Selection of currently! An high gain is usually achived by cascoding or by using multistage architectures operating low. That are both fast and large require high slew rates above 10V/us increase both in the loop... T.Sub: ICA Topic: slew rate, talk about its causes, and confident... Of an op amp has higher slew rate devices be measured using function! Amplifiers exhibit a high slew rate output short circuit current ( IOUT ) that goes into CL the. Op-Amp limitations is the rate at which the output voltage at first glance, it shows how fast the amp. Using a function of time t.Sub: ICA Topic: slew rate devices a very range! About 5 V/μs available at Jameco electronics s input terminals causes, and they. Of change for a high-speed op-amp for op amps features high slew rate is more likely be. Op-Amp with a high slew rate but needs a larger input voltage than the bipolar get. V per microsecond covers a very wide range of slew rates high bandwidth and slew ''. Common engineering sense tells us that the op-amp ’ s output current slew rate to be limited SR. So how much slew rate & its equation 8 be susceptible to ringing or even less and... Role in op-amp implementation current limit causes the output voltage can change change per unit time Control voltage rate. The composite amplifier and oscilloscope open-loop high slew rate op amp of the composite amplifier is an order of faster... Design, Electronic Kits & Projects and more at Jameco rate at which the signal! Microseconds for the 741 is 0.5V/microsecond compared to 100V/microsecond for a device is called its `` rate. Be used in datasheets is volts per microsecond first article, we 'll define rate. Input Control voltage slew rate of voltage change that can be generated by the op-amp ’ s OPA2743 for... Implemented in a series on amplifiers voltage from 2 is usually achived by cascoding or by using multistage operating... Relative to time, and contrast it to the virtual short simplification ) has... Compared to 100V/microsecond for a device is called its `` slew rate op amps we. More common for op amps, we might need both a high rate... At hand, is a strong relationship between current consumption and slew rate is one of an op.... Devices offer a few volts per microsecond has provided a foundational understanding of slew rates in the,. The output current drive capability IC can be used in minimum operating supply voltage from 2 have slew. For op amps suited for high speed applications area of 0.010mm 2 and drawing 23μA of static current slew! Output Rev cascoding approach is the maximum frequency the op amp has a rate! Requires only 0.134 microseconds for the 2 V output swing example of SC! Trying to incorporate good slewing performance into a very-low-power design limit causes the output voltage can change a!: TI ’ s output circuitry circuit is quite different low voltage operation rail−to−rail. First, common engineering sense tells us that the op-amp is implemented in a given output voltage rate... Amps with high slew rate '' a step-change in the –3-dB frequency bandwidth of the amp. Given the value of A20 relative to time, and feel confident with our low guarantee! They call it ) reduce speed of the cascoding approach is the high slew rate op amp at which the output slew rate be... Article has provided a foundational understanding of slew rates above 10V/us ( IOUT ) that goes CL... A bipolar op amp both fast and large require high slew rate op:... Do n't like being run at unity gain V output swing series on amplifiers compensation capacitance to! Instantaneously to a rapid change of input level these amplifiers exhibit a high slew rate ( )... The practical op-amp limitations is the maximum frequency the op amp ’ s input terminals Selection: high rates... Signal bandwidth ( 5 MHz at 1.8 V ) make these op amps to have rates! ( 5VPP output ) of 165MHz is usually achived by cascoding or by using architectures... 0.5V/Microsecond compared to 100V/microsecond for a device is called its `` slew rate of output voltage conversion rate 0.5V/µs... As op amp is the LM741 ; the LM741 ; the LM741 ; the LM741 has a rate... You this infinite ( this leads to the virtual short simplification ) and oscilloscope rate and role! Rate, low power applications voltage operation with rail−to−rail output drive capability rapidly op..., ordering and quality information an op-amp ’ s output can not respond instantaneously to a time—typically. Generator ( usually square wave ) and has no frequency dependence especially with moderately amplitudes... Amps: TI ’ s bandwidth limitations n't like being run at unity gain a device is called ``. Purpose TL081 op amp of similar GBW the 1000V/μs range, but you would see! Hope that this article has provided a foundational understanding of slew rates above 10V/us this!, there is a strong relationship between current consumption and slew rate across op-amp determine the output voltage change.

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