LM324ADR2G Operational Amplifier Specifications and Applications

ElecSuppliers Part Number GuideSep 26, 2026

LM324ADR2G 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 and single-supply analog applications.

The device belongs to the LM324A family and is intended for signal amplification, voltage monitoring, active filtering, sensor interfaces, and general-purpose analog signal conditioning.

Compared with the standard LM324 version, the LM324A family provides improved electrical specifications in areas such as input offset voltage. The exact characteristics depend on the operating conditions and the specific manufacturer's datasheet.

LM324ADR2G Key Specifications

LM324ADR2G contains four operational amplifier channels and has a typical gain bandwidth product of 1 MHz. Its typical slew rate is 0.6 V/µs.

The device supports single-supply operation from 3 V to 32 V and can also operate from dual supplies within the applicable voltage range.

The maximum input offset voltage specified for LM324ADR2G is 3 mV under the applicable datasheet conditions. Typical quiescent current is approximately 0.35 mA for the device.

LM324ADR2G is supplied in a 14-lead SOIC package and is specified for an operating temperature range of 0°C to +70°C.

LM324ADR2G Quad Operational Amplifier

Four independent amplifier channels are integrated into the LM324ADR2G package.

This configuration allows multiple analog functions to be implemented with a single IC. One channel can be used for sensor amplification while the remaining channels can perform buffering, filtering, threshold detection, or other signal-processing functions.

Using a quad amplifier can reduce PCB component count and simplify the power and signal connections compared with using several individual operational amplifier ICs.

The four channels share the same supply rails, but their inputs and outputs operate independently.

LM324ADR2G Supply Voltage

LM324ADR2G supports a wide single-supply operating range from 3 V to 32 V.

Single-supply operation is particularly useful in embedded systems and industrial electronics where the circuit has only one positive power rail. It can simplify the power architecture while allowing the amplifier to process signals referenced to ground.

The supply voltage should be selected together with the expected input common-mode voltage and output voltage range.

Although LM324ADR2G is suitable for single-supply circuits, it is not a rail-to-rail input and output amplifier. The positive-side input and output limitations therefore need to be considered during circuit design.

LM324ADR2G Input Common-Mode Range

LM324ADR2G is designed with an input common-mode range that includes the negative supply rail under the specified conditions.

This feature makes it useful for measuring or amplifying signals close to ground in single-supply circuits.

Typical applications include sensor outputs, battery monitoring, voltage measurement, current sensing, and low-frequency control signals.

The common-mode range should be checked against the selected supply voltage and the actual input signal. Operating outside the specified range can cause increased error or unexpected amplifier behavior.

LM324ADR2G Gain Bandwidth

LM324ADR2G has a typical gain bandwidth product of 1 MHz.

This specification makes the device suitable for relatively low-frequency analog signal processing. Applications such as sensor amplification, voltage monitoring, active filters, and control loops can generally be designed within this bandwidth range.

The available bandwidth decreases as closed-loop gain increases. Designers should therefore consider both gain and signal frequency when determining whether LM324ADR2G provides sufficient dynamic performance.

For high-speed analog applications, a dedicated high-bandwidth operational amplifier may be more appropriate.

LM324ADR2G Input Offset Voltage

One of the important characteristics of LM324ADR2G is its improved input offset specification compared with the standard LM324 version.

The maximum input offset voltage is specified at 3 mV for the LM324A device under the applicable conditions.

Input offset voltage is important when the amplifier is used to process small differential signals. Any offset at the input can appear as an additional error at the output, particularly when the circuit uses high closed-loop gain.

For precision applications, the complete error budget should also consider resistor tolerance, input bias current, temperature drift, PCB leakage, and sensor characteristics.

LM324ADR2G Package

LM324ADR2G uses a 14-pin SOIC package designed for surface-mount PCB assembly.

The SOIC package provides a relatively compact footprint while maintaining four independent amplifier channels.

The exact package is an important part of the ordering code. LM324A devices are also available in other package configurations, including TSSOP versions. Therefore, LM324ADR2G should not be replaced solely based on the LM324A device name without checking the physical package and pin compatibility.

LM324ADR2G Applications

LM324ADR2G can be used in sensor interfaces, signal conditioning circuits, voltage monitoring systems, active filters, industrial controls, battery-powered electronics, and general-purpose analog equipment.

In sensor applications, the amplifier can increase low-level analog signals before they are processed by an ADC.

In voltage monitoring circuits, one or more amplifier channels can be configured as voltage buffers, scaling stages, or threshold detection circuits.

In industrial control equipment, the four channels can be used for several independent analog functions while sharing the same supply system.

The device can also be used in active filter circuits where its bandwidth and slew rate are suitable for the required signal frequency.

LM324ADR2G Design Considerations

When designing with LM324ADR2G, the supply voltage, input common-mode range, output swing, gain, bandwidth, load resistance, and temperature should be evaluated together.

The device is intended for general-purpose analog applications rather than high-speed signal processing. The 1 MHz typical gain bandwidth and 0.6 V/µs typical slew rate should be considered when processing signals with relatively large amplitude or higher frequency.

Power-supply bypass capacitors should be placed close to the IC supply pins. Analog input traces should also be routed away from high-frequency switching signals and other sources of electrical interference.

When unused amplifier channels are present, their inputs should be configured according to the manufacturer's recommended circuit rather than being left floating.

LM324ADR2G and LM324DR2G

LM324ADR2G and LM324DR2G are closely related devices, but they should not automatically be treated as identical parts.

Both are quad single-supply operational amplifiers in SOIC-14 packages with a typical 1 MHz gain bandwidth and 0.6 V/µs slew rate. However, the LM324A version has a tighter maximum input offset voltage specification. Onsemi lists 3 mV maximum for LM324ADR2G compared with 7 mV maximum for LM324DR2G under the applicable conditions.

For a production replacement, the complete electrical requirements should therefore be checked rather than selecting a substitute based only on the shared LM324 name.

LM324ADR2G Sourcing Considerations

When sourcing LM324ADR2G, buyers should confirm the complete manufacturer part number, SOIC-14 package, temperature grade, electrical specifications, quantity, and delivery requirements.

LM324ADR2G is listed by onsemi as a standard-grade device with an operating temperature range of 0°C to +70°C. The related LM324ADTBR2G uses a TSSOP-14 package, so the two parts should not be treated as mechanically interchangeable without checking the PCB design.

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

LM324ADR2G is a practical choice for low-frequency analog designs requiring four operational amplifier channels, single-supply operation, a wide supply range, and improved input offset performance in a compact SOIC-14 package.