LPC661

LPC661 Low Power CMOS Operational Amplifier May 1998 LPC661 Low Power CMOS Operational Amplifier General Description The LPC661 CMOS operational amplifier is ideal for operation from a single supply. It features a wide range of operating supply voltage from +5V to +15V, rail-to-rail output swing and an input common-mode range that includes ground. Performance limitations that have plagued CMOS amplifiers in the past are not a problem with this design. Input VOS, drift, and broadband noise as well as voltage gain (into 100 kΩ and 5 kΩ) are all equal to or better than widely accepted bipolar equivalents, while the supply current requirement is typically 55 µA. This chip is built with National’s advanced Double-Poly Silicon-Gate CMOS process. See the LPC660 datasheet for a Quad CMOS operational amplifier or the LPC662 data sheet for a Dual CMOS operational amplifier with these same features. n n n n n n n n n n Low supply current 55 µA Specified for 100 kΩ and 5 kΩ loads High voltage gain 120 dB Low input offset voltage 3 mV Low offset voltage drift 1.3 µV/˚C Ultra low input bias current 2 fA Input common-mode range includes GND Operating range from +5V to +15V Low distortion 0.01% at 1 kHz Slew rate 0.11 V/µs Applications n n n n n n n High-impedance buffer Precision current-to-voltage converter Long-term integrator High-impedance preamplifier Active filter Sample-and-Hold circuit Peak detector Features (Typical unless otherwise noted) n Rail-to-rail output swing Connectio...