LM246N

Overview

The LM246N is a quad bipolar operational amplifier in a 16-pin DIP package. It features four independent, high-gain, internally compensated amplifiers with low power consumption of 250 μA per amplifier. The device offers a gain-bandwidth product of 1 MHz and large DC voltage gain of 120 dB. Electrical characteristics such as supply current, slew rate, input bias current, and noise can be programmed using two external resistors connected to pins 8 and 9. It operates from a wide power supply range of ±1.5 V to ±22 V.

Feature Summary

• Features programmable electrical characteristics including gain-bandwidth product, slew rate, and supply current via external resistors.
• Includes Class AB output stage to eliminate crossover distortion.
• Provides overload protection for both inputs and outputs.
• Offers excellent isolation between amplifiers with a channel separation of 120 dB.

Applications

• Applications requiring multiple UA741-type amplifiers with lower power consumption
• Designs demanding high packaging density
• Circuits requiring precise amplifier matching

Procurement Notes

Verify the ordering suffix 'N' confirms the 16-pin plastic Dual In Line Package (DIP). Confirm the temperature range corresponds to the industrial grade (-40°C to +105°C) specified for the LM246 variant. Ensure the application circuit correctly connects the programming resistors to pins 8 and 9 to set the desired electrical parameters.

Selection Notes

Select this component when a quad op-amp solution is needed with adjustable performance metrics. The LM246N allows trade-offs between supply current and bandwidth. It serves as a pin-compatible alternative to the LM324 and LM348 families while offering superior thermal isolation and lower quiescent current compared to standard general-purpose quad amplifiers.

Part Context

The LM246N belongs to the LM146/LM246/LM346 family of programmable quad bipolar operational amplifiers manufactured by STMicroelectronics. This series is designed to provide functional characteristics similar to the UA741 but with significantly reduced total supply current. The LM246 specifically denotes the industrial temperature range version within this lineup.

Replacement Considerations

Pin-compatible substitutes include the LM324 and LM348. However, these alternatives lack the programmability feature found in the LM246N. Designers must verify if the fixed electrical characteristics of the replacement parts meet the specific bandwidth and current requirements of the original design.

FAQ

How are the electrical characteristics of the LM246N adjusted?

The gain-bandwidth product, slew rate, supply current, and input bias current are programmed using two external resistors connected to pins 8 and 9.

What is the operating temperature range for the LM246N?

The LM246N operates within an industrial temperature range of -40°C to +105°C.