Description: The NE5230 is a very low voltage operational amplifier that can perform with a voltage supply as low as 1.8 V or as high as 15 V. In addition split or single supplies can be used and the output will swing to ground when applying the latter. There is a bias adjusting pin which controls the supply current required by the device and thereby controls its power consumption. If the part is operated at±0.9 V supply voltages the current required is only 110mA when the current control pin is left open. Even with this low power consumption the device obtains a typical unity gain bandwidth of 250 kHz. When the bias adjusting pin is connected to the negative supply the unity gain bandwidth is typically 600 kHz while the supply current is increased to 600mA. In this mode the part will supply full power output beyond the audio range. TheNE5230also has a unique input stage that allows the commonmode input range to go above the positive and below the negative supply voltages by 250 mV. This provides for the largest possible input voltages for low voltage applications. The part is also internallycompensated to reduce external component count. TheNE5230has a low input bias current of typically±40 nA and a large open loop gain of 125 dB. These two specifications are beneficial when using the device in transducer applications. The large open loop gain gives very accurate signal processing because of the large excess loop gain in a closedloop system. The output stage is a class AB type that can swing to within 100 mV of the supply voltages for the largest dynamic range that is needed in many applications.