LM324DR2G Operational Amplifier Specifications and Applications

ElecSuppliers Part Number GuideSep 26, 2026

The LM324DR2G is a quad general-purpose operational amplifier from onsemi. It integrates four independent operational amplifier channels in a single 14-pin SOIC package and is designed for low-voltage analog signal processing.

The device is part of the LM324 amplifier family and supports single-supply operation. Its input common-mode range includes the negative supply rail, making it suitable for circuits that process signals close to ground.

LM324DR2G is commonly used in sensor interfaces, voltage monitoring circuits, signal conditioning, active filters, industrial control systems, and general-purpose analog designs.

LM324DR2G Key Specifications

LM324DR2G provides four operational amplifier channels in one package. It supports a supply voltage range from 3 V to 32 V for single-supply operation, or equivalent dual-supply operation within the specified limits.

The device has a typical gain bandwidth product of 1 MHz and a typical slew rate of 0.6 V/µs. Its input offset voltage and input bias current depend on the specified operating conditions and electrical grade.

The amplifier provides an output current capability of approximately 40 mA per channel under the applicable conditions. It also includes internally compensated amplifier stages and short-circuit-protected outputs.

LM324DR2G is specified for an operating temperature range of 0°C to +70°C.

LM324DR2G Quad Amplifier Configuration

The LM324DR2G contains four independent operational amplifiers. Each channel has two input terminals and one output terminal.

Integrating four amplifiers into one IC can reduce PCB space and simplify the design of analog circuits that require multiple amplification or signal-processing stages.

For example, one channel can be used for sensor amplification, another for voltage comparison, and the remaining channels for filtering or signal buffering.

Although the four channels are integrated into the same package, each amplifier must be evaluated according to its own input, output, loading, and stability requirements.

LM324DR2G Supply Voltage

LM324DR2G is designed for single-supply operation from 3 V to 32 V. It can also be used with dual power supplies within the applicable operating range.

Single-supply operation is useful in embedded and industrial systems where only one positive power rail is available. It eliminates the need for a separate negative supply in many low-frequency analog circuits.

The selected supply voltage must provide sufficient input and output operating range for the intended circuit. Designers should also consider power-supply noise because fluctuations on the supply rail can affect analog signal accuracy.

LM324DR2G Input Common-Mode Range

One important characteristic of LM324DR2G is that its input common-mode range includes the negative supply rail.

This allows the amplifier to process input signals close to ground in many single-supply circuits. It is useful for sensor outputs, voltage measurements, current-sensing circuits, and other applications where the input signal starts near 0 V.

However, the input common-mode range does not necessarily extend to the positive supply rail. The input voltage must remain within the limits specified in the datasheet for the selected supply voltage and operating conditions.

LM324DR2G Gain Bandwidth and Slew Rate

LM324DR2G has a typical gain bandwidth product of 1 MHz and a typical slew rate of 0.6 V/µs.

These specifications make the device suitable for low-frequency signal amplification, voltage monitoring, active filtering, and control applications. It is not intended to replace high-speed operational amplifiers in circuits requiring fast transitions or wide analog bandwidth.

The available closed-loop bandwidth depends on the selected gain. As the closed-loop gain increases, the usable signal bandwidth generally decreases.

The required signal frequency, output amplitude, gain, and transient response should therefore be evaluated together when selecting LM324DR2G.

LM324DR2G Output Performance

The LM324 family is designed to provide an output voltage range that extends close to the negative supply rail under suitable load conditions.

This characteristic is useful in single-supply circuits where the output must approach ground. However, the output cannot generally be assumed to reach the positive supply rail.

Output voltage swing depends on supply voltage, load resistance, output current, temperature, and the specific operating conditions. Designers should check the output limitations before using LM324DR2G in comparator-like or high-current applications.

The amplifier includes short-circuit protection, but continuous operation under overload conditions should still be evaluated carefully.

LM324DR2G Package and Pin Configuration

LM324DR2G is supplied in a 14-pin SOIC package and is designed for surface-mount PCB assembly.

The package contains four operational amplifier channels, along with the positive and negative supply connections. The pin configuration follows the standard LM324 quad operational amplifier arrangement for the applicable device family.

When replacing LM324DR2G, the package outline, pin assignment, electrical specifications, and manufacturer ordering code should be checked carefully.

A different LM324 variant may use a different package, temperature grade, or electrical performance level even when the basic device name is similar.

LM324DR2G Applications

LM324DR2G can be used in sensor signal conditioning, battery monitoring, voltage detection, industrial control, active filters, audio-related low-frequency circuits, and embedded analog systems.

In sensor interfaces, the amplifier can increase low-level signals before they are processed by a microcontroller or analog-to-digital converter.

In battery monitoring circuits, LM324DR2G can be used for voltage scaling, threshold detection, and signal buffering.

In industrial equipment, its four amplifier channels can support multiple analog functions such as current monitoring, temperature measurement, feedback control, and alarm signal processing.

The device can also be used in power supply monitoring circuits, signal filters, waveform conditioning circuits, and general-purpose analog development projects.

LM324DR2G Design Considerations

When designing with LM324DR2G, the supply voltage, input common-mode range, output voltage swing, gain, bandwidth, slew rate, and load conditions should be considered together.

The device is intended for general-purpose low-frequency analog applications. It may not be suitable for high-speed signal processing, precision low-offset measurement, or rail-to-rail operation unless the circuit requirements remain within its specified limits.

For stable operation, appropriate feedback components and supply bypass capacitors should be used. The PCB layout should keep sensitive analog inputs away from switching nodes, high-current traces, and noisy digital signals.

Unused amplifier channels should also be handled according to the manufacturer's recommendations rather than leaving their inputs floating.

LM324DR2G Sourcing Considerations

When sourcing LM324DR2G, buyers should confirm the complete onsemi part number, SOIC-14 package, operating temperature range, quantity, and required delivery schedule.

LM324DR2G should not be automatically treated as interchangeable with LM324ADR2G, LM324DTBR2G, or LM324ADTBR2G. These related ordering codes may have different electrical grades or package configurations.

For production procurement, buyers should verify the manufacturer, date code, packaging condition, traceability, and datasheet specifications for the exact ordering code.

LM324DR2G is a practical quad operational amplifier for low-frequency analog circuits requiring single-supply operation, four amplifier channels, a wide supply range, and a compact SOIC-14 package.