Op amp operates up to 24 volts

Santa Clara, Calif. — National Semiconductor Corp. unveiled a rail-to-rail output CMOS operational amplifier (op amp) today with a wide operating range (up to 24 volts) that is said to meet the noise, power and low-input bias requirements of industrial and telecommunications applications.

The LM6211 op amp is a 20-MHz wide-bandwidth, low-noise operational amplifier with a single supply-voltage range of 5 V to 24 V and a 0.5-picoamp low input bias current for interfacing with high impedance sources.

With an input voltage noise of 5.5 nV/√ Hz at 10 kHz, and 10 femtoAmps/√ Hz input current noise, the LM6211 is said to improve signal fidelity found in wireless and sensor interface applications. In addition, its low input capacitance ensures stability when used at high-frequencies or in high-gain sensor applications, the company said. To accurately monitor voltage conditions with minimal system power consumption, the LM6211 draws a low supply current of less than 1 milliamp.

The op amp has guaranteed performance from -40°C to 125 °C. It also has an output short-circuit current, which limits the current to 25 mA, and a slew rate of 5.6 V/microsecond.

The LM6211's rail-to-rail output stage remains stable with capacitive loads as high as 500 picofarads. The op amp can be used with larger resistors due to its smaller input capacitance of 5.5 pF at 24 V. This also makes the LM6211 suited for wideband transimpedance amplifiers. The amplifier can be used in applications that require an operational amplifier with very low input bias currents and a maximum output voltage swing of 24 V, such as an active loop-filter for phase-locked loops (PLLs).

See related diagram

Available now in a SOT23-5 package, the LM6211 is priced at $1.19 in 1,000-unit quantities.
Click here for the LM6211 data sheet.

National Semiconductor Corp. , 1-800-272-9959,

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