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LF444 データシート(PDF) 6 Page - National Semiconductor (TI) |
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LF444 データシート(HTML) 6 Page - National Semiconductor (TI) |
6 / 10 page Pulse Response R L = 10 kΩ,CL = 10 pF Application Hints This device is a quad low power op amp with JFET input de- vices ( BI-FET™). These JFETs have large reverse break- down voltages from gate to source and drain eliminating the need for clamps across the inputs. Therefore, large differen- tial input voltages can easily be accommodated without a large increase in input current. The maximum differential in- put voltage is independent of the supply voltages. However, neither of the input voltages should be allowed to exceed the negative supply as this will cause large currents to flow which can result in a destroyed unit. Exceeding the negative common-mode limit on either input will force the output to a high state, potentially causing a re- versal of phase to the output. Exceeding the negative common-mode limit on both inputs will force the amplifier output to a high state. In neither case does a latch occur since raising the input back within the common-mode range again puts the input stage and thus the amplifier in a normal operating mode. Exceeding the positive common-mode limit on a single input will not change the phase of the output; however, if both in- puts exceed the limit, the output of the amplifier will be forced to a high state. The amplifiers will operate with a common-mode input volt- age equal to the positive supply; however, the gain band- width and slew rate may be decreased in this condition. When the negative common-mode voltage swings to within 3V of the negative supply, an increase in input offset voltage may occur. Each amplifier is individually biased to allow normal circuit operation with power supplies of ±3.0V. Supply voltages less than these may degrade the common-mode rejection and re- strict the output voltage swing. The amplifiers will drive a 10 k Ω load resistance to ±10V over the full temperature range. If the amplifier is forced to drive heavier load currents, however, an increase in input offset voltage may occur on the negative voltage swing and finally reach an active current limit on both positive and negative swings. Small Signal Inverting DS009156-6 Small Signal Non-Inverting DS009156-7 Large Signal Inverting DS009156-8 Large Signal Non-Inverting DS009156-9 www.national.com 6 |
同様の部品番号 - LF444 |
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同様の説明 - LF444 |
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