Using the NE/SA5234 amplifier:The NE/SA5234 is a unique low-voltage quad operational amplifier specifically designed to operate in a broadly diverse environment. It is an enhanced pin-for-pin replacement for the LM324 category of devices. Supply conditions can range from 1.8V to 6.0V with a resultant current drain of 2.8mA,-700mA per op amp. Most notable are the input and output dynamic range characteristics of the individual op amps. The common-mode input voltage can actually exceed the positive and negative supply rails by 250mV with no danger of output latching or polarity reversal. In addition, the output of each op amp will swing to within 50mV of the supply rails over the full supply range. The frequency related characteristics are also above average for low voltage devices in this class. Internal unity gain compensation makes the NE5234 very resistant to any tendency to oscillate in low closed-loop gain configurations. Even so, a unity-gain bandwidth of 2.5MHz is retained. Slew rate is 0.8V/ms and each op amp will settle to a 1% of nominal level within 1.4ms.