LM324NSRG4 - Quad Op Amp in 14-SO | Texas Instruments
部品番号: LM324NSRG4 ✓ 生産中LM324NSRG4 概要
An operational amplifier is an analog integrated circuit that compares its inverting and non-inverting inputs and drives its output according to the voltage difference between them. Operational amplifiers belong to the amplifier IC hierarchy and are widely used in signal chains spanning sensors, data converters, audio equipment, industrial controls, communications, and instrumentation. Negative feedback shapes the closed-loop behavior, while the amplifier supplies the gain or current required to drive the next stage.
The LM324NSRG4 provides 4 amplifier channels in one 14-SO package, making it suitable for designs that require matched functional channels without allocating a separate package for every stage. Its general-purpose classification supports a broad range of conventional analog designs. Because the exact electrical limits, voltage ranges, current capability, noise performance, and temperature ratings are not reproduced in the indexed product excerpts, engineers should use the manufacturer datasheet for final circuit qualification.
The quad topology can simplify layouts that require several related functions. A four-channel implementation may handle two differential or buffered channels, four noninverting gain stages, or a mixture of filtering and amplification functions. Combining these blocks in one package can shorten interstage routing and reduce board-space requirements compared with four discrete single-amplifier packages, provided the selected amplifier ratings satisfy every channel requirement.
Typical uses include low-frequency sensor conditioning, general voltage buffering, analog signal processing, current-to-voltage conversion, basic active filters, and control-signal interfaces. The device is most appropriate when the design calls for a conventional general-purpose amplifier rather than the low-noise, high-speed, low-power, or precision characteristics associated with specialized operational-amplifier families.
Before finalizing the PCB design, assign every pin by consulting the pin-description table in the Texas Instruments datasheet. Preserve the package orientation, route sensitive input and feedback paths away from noisy switching nodes, and include the bypass and compensation components specified by the application circuit. Confirm supply voltage, input common-mode range, output swing, load capability, and stability requirements over the full intended temperature range.
This product page organizes the confirmed package and amplifier configuration, identifies a directly documented replacement, and adds engineering guidance for schematic definition, PCB implementation, and alternative selection. It is intended to accelerate component searches while keeping the final design decision tied to the manufacturer datasheet and the electrical requirements of the target application.
ドロップイン代替品: LM324NSRG4 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
LM324KNSRE4
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LM324NSRG4 最大定格＆電気的特性
| Manufacturer | Texas Instruments |
| Device Type | Quadruple operational amplifier |
| Number of Amplifier Circuits | 4 circuits |
| Product Classification | Standard general-purpose amplifier |
| パッケージ | 14-SO |
| Total Pin Count | 14 pins |
| Mounting Technology | Surface mount |
LM324NSRG4 14-so ピン配置ガイド
LM324NSRG4 (14-so パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: LM324NSRG4.
詳細は データシート をご参照ください。
主な用途
LM324NSRG4 の用途: 6 件s: General-Purpose Sensor Conditioning, Industrial Control-Signal Interfaces, Audio and Low-Frequency Signal Paths, Active Filtering and Feedback Networks, Data-Acquisition Input Conditioning, Power-Supply Control and Feedback Circuits.
General-Purpose Sensor Conditioning
The LM324NSRG4 is suitable for conditioning sensor signals when a design needs several similar analog channels rather than a specialized low-noise or precision amplifier. Its 4 amplifier circuits can be assigned to buffering, gain, or feedback functions within a 14-SO package, reducing the number of separate amplifier packages. The circuit should verify the sensor output range against the input common-mode limits, choose a feedback network that preserves required signal bandwidth, and keep high-impedance sensor traces short. Check the manufacturer datasheet for the exact offset, bias-current, slew-rate, and temperature conditions that govern the selected operating point.
おすすめ
Industrial Control-Signal Interfaces
The LM324NSRG4 can support industrial control interfaces that require multiple buffered or amplified voltage signals, provided its electrical ratings satisfy the plant environment. The 4-channel implementation is useful for scaling controller outputs, buffering sensor inputs, or implementing repeated active stages in one 14-SO package. Industrial designs should verify the allowable supply range, common-mode range, output swing, and temperature grade against the enclosure conditions. Keep feedback components close to their assigned amplifier, use a stable reference for scaled outputs, and isolate analog paths from motors, relays, and switching supplies to prevent unintended feedback or transient damage.
おすすめ
Audio and Low-Frequency Signal Paths
The LM324NSRG4 may be used in conventional low-frequency audio or instrumentation paths that do not require the low-noise and high-speed performance of a dedicated audio amplifier. Its 4 amplifier channels can implement buffering, active gain, tone-control, or feedback stages in a 14-SO package. The design must confirm that the required audio bandwidth, output swing, load impedance, and noise contribution meet the system specification. Use short input traces, maintain stable feedback ratios, and place input-referenced compensation components according to the manufacturer application guidance. Verify channel stability with the actual source impedance and load before production release.
おすすめ
Active Filtering and Feedback Networks
The LM324NSRG4's 4 amplifier channels can implement repeated active-filter or feedback sections where compactness and conventional general-purpose operation are priorities. Separate channels allow different resistor and capacitor networks to realize low-pass, high-pass, or other feedback-based stages while sharing one package outline. Confirm loop gain and stability across the intended frequency range, especially with the signal-source impedance and capacitive load expected in the finished board. Place each feedback network close to its amplifier, maintain consistent grounding between channels, and use the manufacturer test-circuit arrangement as the basis for selecting compensation and bypassing.
おすすめ
Data-Acquisition Input Conditioning
The LM324NSRG4 can form part of a multi-channel data-acquisition front end when each sensor or reference node requires buffering before conversion. The 4 amplifier channels can reduce package count while providing repeated impedance isolation, scaling, or active feedback functions. Confirm the amplifier's input common-mode range against the converter's full-scale input span, verify offset and bias-current contributions against the required accuracy, and assess whether the gain-bandwidth product is sufficient for the sampling system. Use a quiet reference, short high-impedance routes, and a single-point ground strategy around the analog section to minimize coupling from digital and switching circuitry.
おすすめ
Power-Supply Control and Feedback Circuits
The LM324NSRG4 can support low-bandwidth control loops, current-feedback paths, and power-supply error amplifiers when the loop bandwidth and operating limits remain within the device's application range. Four channels provide flexibility for error amplification, current sensing, soft-start control, and auxiliary signal conditioning in one 14-SO package. Designers must verify the supported supply voltage, input common-mode range, output swing, and stability with the power-stage capacitance and compensation network. Keep the high-current switching node physically separated from the error amplifier, use Kelvin routing where applicable, and validate loop crossover and phase margin under the worst expected load transient.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: LM324NSRG4 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | LM324KNSRE4 |
|---|---|---|
| Brand | Texas Instruments | Texas Instruments |
| Package | 14-SO | 14-SO |
| Total Pin Count | 14 pins | 14 pins |
主な差別化要因
- Four amplifier channels in one component （vs Single-amplifier devices such as MCP601-E/ST)
- Documented direct-replacement relationship （vs LM324KNSRE4)
- General-purpose amplifier positioning （vs OPA132UA)
設計ノート
Assign all 14 connections from the pin-description table in the manufacturer datasheet rather than inferring the four-channel order from the package drawing. Preserve the SO-14 footprint, lead pitch, and orientation shown by the package outline. Place each op-amp's feedback resistors and compensation capacitors close to their associated pins, keep input traces short, and route outputs away from adjacent clock or switching nodes to reduce capacitive feedthrough.
Do not select the LM324NSRG4 solely because it contains 4 amplifier channels. Confirm the supply voltage, input common-mode range, output swing, output-current capability, gain-bandwidth product, slew rate, and operating temperature range against the complete design requirements. Pay particular attention to source impedance, load capacitance, and the intended closed-loop gain because these factors determine stability and usable bandwidth beyond the basic package configuration.
Separate sensitive amplifier inputs from power-conversion and digital timing paths. Use a continuous ground reference beneath the analog section where the board construction permits, provide local supply bypassing according to the manufacturer layout guidance, and avoid sharing narrow return paths with high-current outputs. For sensor or current-measurement circuits, use Kelvin routing so voltage drops in copper and connectors do not become part of the measured signal.
Validate every channel with its real source impedance and load because nominal amplifier bandwidth alone does not guarantee closed-loop stability. Check gain flatness and phase margin at the highest intended frequency, add the recommended output isolation when driving capacitive loads, and compare the selected feedback values with the manufacturer test circuit. If one channel is unused, follow the datasheet's prescribed connection rather than leaving it floating.
コンプライアンス情報
The indexed product excerpts do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is not applicable to the identified standard general-purpose LM324NSRG4 configuration.