LM324EDR2G - Quad Single-Supply Op Amp | onsemi | SOIC-14
MPN: LM324EDR2G ✓ ActiveLM324EDR2G Overview
An operational amplifier, commonly called an op amp, is a high-gain differential amplifier used to amplify, buffer, compare, or otherwise condition analog signals. The LM324 belongs to the quad operational-amplifier family, combining four amplifiers in one package. This integration reduces board area and simplifies designs that need several similar analog channels, such as sensor interfaces, filters, control loops, and signal conditioning stages.
The LM324EDR2G is intended for single-supply operation, which is useful in systems powered from a positive rail with a ground reference. Its four-circuit arrangement allows designers to assign separate amplifiers to independent signal paths while retaining a common package and supply arrangement. The 14-pin SOIC package is a standard surface-mount option for through-hole assembly and conventional PCB manufacturing.
The LM324 is a general-purpose amplifier rather than a precision or high-speed signal-chain device. Its four channels make it especially useful in designs where several moderate-bandwidth, moderate-accuracy amplifier functions are required. Common uses include buffering sensor outputs, amplifying low-level control signals, implementing simple active filters, driving ADC input stages, and providing gain in feedback-control circuits.
In practical designs, the amplifier supply pins must be connected according to the manufacturer pinout, and each channel must have appropriate input and feedback components. Input common-mode range, output swing, noise, bandwidth, input bias current, output-current capability, and absolute maximum ratings should be checked against the manufacturer datasheet before finalizing the circuit. Decoupling capacitors should be placed close to the supply pins to reduce supply noise and improve transient response.
Because the LM324 is a quad amplifier in a 14-pin SOIC, PCB layouts should preserve adequate clearance around adjacent pins and route sensitive input traces away from noisy switching nodes. The same package footprint and four-channel organization can simplify product-family standardization when a design moves between related quad operational amplifiers.
This product page combines the manufacturer-family identity, package information, application guidance, comparison criteria, and practical layout considerations to support faster component selection and PCB planning.
Drop-in alternatives for LM324EDR2G — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LM324EDR2G (same form factor and footprint) — differing in Amplifier Type, Package, Architecture, Input Offset Voltage, Packaging.
LM324ADR2G
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →LM324DR2G
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →LM324DR
✅ Drop-InContact for price
View Datasheet →LM324ADR2G
✅ Drop-InContact for price
View Datasheet →LM324AIDR
✅ Drop-In📋 Reference alternative (not in catalog)
LM324EDR2G Maximum Ratings & Electrical Characteristics
| Product Type | Quad operational amplifier |
| Number of Amplifier Circuits | 4 circuits |
| Supply Configuration | Single supply |
| Product Category | Standard general-purpose instrumentation and buffer amplifier |
| Package | 14-pin SOIC |
| Mounting Type | Surface mount |
| Number of Pins | 14 pins |
| Amplifier Channel Count | 4 channels |
LM324EDR2G Pin Configuration
| Pin 1 | OUTA — Amplifier A output |
| Pin 2 | INA- — Amplifier A inverting input |
| Pin 3 | INA+ — Amplifier A non-inverting input |
| Pin 4 | V- — Negative supply connection |
| Pin 5 | INB+ — Amplifier B non-inverting input |
| Pin 6 | INB- — Amplifier B inverting input |
| Pin 7 | OUTB — Amplifier B output |
| Pin 8 | OUTC — Amplifier C output |
| Pin 9 | INC- — Amplifier C inverting input |
| Pin 10 | INC+ — Amplifier C non-inverting input |
| Pin 11 | V+ — Positive supply connection |
| Pin 12 | IND+ — Amplifier D non-inverting input |
| Pin 13 | OUTD — Amplifier D output |
| Pin 14 | IND- — Amplifier D inverting input |
Typical Applications
LM324EDR2G is suitable for 6 applications: Sensor Signal Conditioning, Active Low-Pass Filtering, ADC Input Conditioning, Industrial Control Loops, Audio and Communication Interfaces, Portable and Battery-Powered Equipment.
Sensor Signal Conditioning
The LM324EDR2G is suitable for multichannel sensor conditioning because it combines four single-supply amplifier circuits in one 14-pin SOIC. One channel can buffer a sensor output, another can provide adjustable gain, and the remaining channels can implement filtering or level conditioning ahead of an ADC. This arrangement reduces package count and simplifies routing on compact analog boards. The sensor output must remain within the amplifier's input common-mode range, and the complete signal path must stay within the device's specified bandwidth and output-swing limits. Check the manufacturer datasheet for the exact input bias current, offset voltage, common-mode range, and output-drive capability before fixing resistor values.
Recommended
Active Low-Pass Filtering
The four channels in the LM324EDR2G allow a designer to implement several active-filter sections around a shared single supply. A second-order low-pass section can use one amplifier with resistors and capacitors, while the other channels can support additional stages or buffering between filtering and conversion. The 14-pin SOIC keeps four amplifiers in one footprint and is well suited to boards requiring multiple filter functions. Stable operation depends on selecting resistor and capacitor values from the manufacturer's gain-bandwidth and noise information, including the effect of the amplifier's output impedance. Verify the closed-loop response in simulation and ensure input signals remain within the usable common-mode and output ranges.
Recommended
ADC Input Conditioning
The LM324EDR2G can condition several analog inputs before conversion by buffering high-impedance sources, applying gain, and shifting or scaling signals into the ADC's input range. Because the device includes four amplifier channels in a single 14-pin SOIC, it is efficient for multichannel data-acquisition boards where space and channel count matter. Use the amplifier's common-mode range, output swing, gain-bandwidth product, and output-capability values to establish the usable input and output window. Keep input traces short, connect a local supply bypass capacitor close to the device, and account for settling time when switching between channels through external multiplexers.
Recommended
Industrial Control Loops
The LM324EDR2G is appropriate for low-to-moderate-bandwidth industrial control functions that require amplification, comparison, or feedback around a sensor and actuator interface. Its four single-supply channels can be allocated to an error amplifier, a signal conditioner, an output driver stage, and an additional buffer. The integrated quad package reduces the number of components needed beside a controller or ADC. Design verification should include control-loop stability, output swing under the expected load, common-mode headroom at the error input, and the operating-temperature range. A compensation network should be derived and simulated using the electrical model and stability information in the manufacturer datasheet.
Recommended
Audio and Communication Interfaces
The quad LM324EDR2G can provide low-level signal conditioning for audio or communications equipment where several general-purpose amplifier functions are required. The four channels may buffer source outputs, amplify weak signals, implement gain stages, or support monitoring paths in a single-supply system. Its general-purpose designation makes it appropriate for noncritical auxiliary channels rather than demanding high-precision or high-bandwidth audio paths. Confirm the device's bandwidth, output swing, noise, and slew-rate behavior against the signal requirements. Use short, shielded routing where appropriate and provide stable supply bypassing to prevent communication-channel noise or distortion.
Recommended
Portable and Battery-Powered Equipment
The LM324EDR2G can consolidate four analog functions in compact, single-supply equipment such as portable instruments, sensor hubs, and low-power embedded systems. Four channels in one 14-pin SOIC reduce board area compared with separate single or dual amplifier packages. The compact package also shortens local signal paths when channel assignments are planned carefully. Because the LM324 is a general-purpose amplifier, battery-life analysis must include both the load current and the amplifier's own supply current using the manufacturer operating-current values. Verify whether the required rail, common-mode range, output swing, and temperature conditions remain valid throughout battery discharge, and size supply bypassing for the expected transient load.
Recommended
Recommended Products Summary
Engineering reference data for LM324EDR2G — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LM324ADR2G | LM324DR2G | LM324DR | LM324ADR | LM324AIDR |
|---|---|---|---|---|---|---|
| Manufacturer | onsemi | onsemi | onsemi | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC |
| Amplifier Channels | 4 circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits |
Key Differentiators
- Four amplifier channels in one package (vs TLV2402ID)
- General-purpose single-supply quad architecture (vs LM2904P3)
- Same-family onsemi replacement path (vs LM324ADR2G)
Design Notes
Connect the LM324EDR2G supply pins according to the 14-pin SOIC pinout and place a local bypass capacitor close to the positive supply pin. Keep the negative supply return short and connect it to the board ground reference. Before selecting the capacitor value and confirming operation, verify the device's absolute maximum supply voltage, recommended operating range, supply-current limits, and output-swing behavior in the manufacturer datasheet.
Assign the four amplifier channels so that sensitive inputs are not forced to cross noisy output or supply routes. Keep feedback components close to their associated amplifier pins, minimize input-node capacitance where source impedance is high, and maintain a continuous ground reference beneath the device where practical. Verify the SOIC orientation against the pin-1 marking before fabrication to avoid mirrored channel and supply connections.
Do not assume that every quad LM324 ordering suffix has identical electrical and temperature limits. Compare input offset, input bias current, common-mode range, output swing, gain-bandwidth product, output-current capability, and operating-temperature grade before substituting a part in an existing design. Also verify that the replacement uses the same 14-pin channel assignments and physical dimensions.
For sensor or ADC interfaces, check source impedance against the amplifier's input-bias-current and capacitance requirements, then verify closed-loop settling at the operating frequency. Place the amplifier and its feedback network near the source or converter when possible. Filtering and guarding can help with high-impedance nodes, but component values should be selected using the manufacturer noise, bandwidth, and stability characteristics.
Compliance Information
Compliance status requires confirmation from the current onsemi product documentation or declaration for the exact LM324EDR2G order code.