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NE5230DR2G Datasheet(PDF) 9 Page - ON Semiconductor |
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NE5230DR2G Datasheet(HTML) 9 Page - ON Semiconductor |
9 / 18 page NE5230, SA5230, SE5230 http://onsemi.com 9 The full output power bandwidth range for VCC equals 2.0 V, is above 40 kHz for the maximum bias current setting and greater than 10 kHz at the minimum bias current setting. If extremely low signal distortion (<0.05%) is required at low supply voltages, exclude the common−mode crossover point (VB1) from the common−mode signal range. This can be accomplished by proper bias selection or by using an inverting amplifier configuration. Most single supply designs necessitate that the inputs to the op amp be biased between VCC and ground. This is to assure that the input signal swing is within the working common−mode range of the amplifier. This leads to another helpful and unique property of the NE5230 that other CMOS and bipolar low voltage parts cannot achieve. It is the simple fact that the input common−mode voltage can go beyond either the positive or negative supply voltages. This benefit is made very clear in a non−inverting voltage−follower configuration. This is shown in Figure 5 where the input sine wave allows an undistorted output sine wave which will swing less than 100 mV of either supply voltage. Many competitive parts will show severe clipping caused by input common−mode limitations. The NE5230 in this configuration offers more freedom for quiescent biasing of the inputs close to the positive supply rail where similar op amps would not allow signal processing. There are not as many considerations when designing with the NE5230 as with other devices. Since the NE5230 is internally−compensated and has a unity gain−bandwidth of 600 kHz, board layout is not so stringent as for very high frequency devices such as the NE5205. The output capability of the NE5230 allows it to drive relatively high capacitive loads and small resistive loads. The power supply pins should be decoupled with a low−pass RC network as close to the supply pins as possible to eliminate 60 Hz and other external power line noise, although the power supply rejection ratio (PSRR) for the part is very high. The pinout for the NE5230 is the same as the standard single op amp pinout with the exception of the bias current adjusting pin. V+ V− + − NE5230 OTHER PARTS V+ V− V+ V− V+ V− Figure 5. In a non−inverting voltage−follower configuration, the NE5230 will give full rail−to−rail swing. Other low voltage amplifiers will not because they are limited by their input common−mode range and output swing capability. |
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