NJM2711

The NJM2711 has the following features including Operating Voltage  (±2.0 to ±4.5V);Operating Current  (1.9mA typ. at V /V=±2.5V) ;High Slew Rate  (260V/s typ.) ;Gain Bandwidth Product  (1GHz typ.) ;Bandwidth  (10MHz typ. at 40dB) ;Unity Gain Bandwidth  (180MHz typ.) ;Input Offset Voltage  (7mV max.) ;Open Loop Voltage Gain  (75dB typ.) ;Bipolar Technology ;Package Outline  MTP5 .

The NJM2711 is an ultra high speed single operational amplifier.It can swings 260V/s high slew rate and 1GHz gain band width product(10MHz typ. at 40dB) at ±2.5V. It is suitable for pickup circuit of CD-R/RW or DVD-R/RW, wideband video system, high resolution scanner NJM2711F  or FAX, high speed telecommunications, and any other high speed signal processing system. For non-inverting amplifier The closed gain should be 6dB or higher to prevent the oscillation. Unity gain follower application may cause the oscillation. When the closed gain is lower than 20dB, use a compensation capacitor  (CF: about 5pF), parallel with the feedback resistor RF to avoid oscillation. Recommended feedback resistor is less than 2k-ohom to keep the flatness of the frequency response.Minimize the load capacitor for the better performance.A large load capacitor CL reduces the frequency response and causes oscillation or ringing.

For inverting amplifier NJM2711,When the closed gain of NJM2711 is lower than 20dB, use a compensation capacitor (CF; recommended from 1pF to 5pF), parallel with the feedback resistor RF to avoid oscillation. Minimize the feedback resistor to keep the frequency response and the slew rate. (recommended about 1k-ohom) The proper compensation capacitor CF can counteract oscillation even with a large feedback resistor RF.  Total load capacitance should be not more than 100pF. The oscillation margin may be affected by the total load capacitance.

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