LM324PWRG3 - 4-Channel 1.2MHz Op Amp | Texas Instruments
MPN： LM324PWRG3 ✓ 啟用中LM324PWRG3 概覽
An operational amplifier is an analog signal-processing IC that compares two input voltages and drives its output toward the higher input voltage. The operational amplifier category includes instrumentation amplifiers, buffer amplifiers, comparators, and general-purpose amplifiers. Within the power-management and signal-conditioning hierarchy, a quad operational amplifier consolidates four amplifiers into one package while preserving independent input, output, and supply connections.
The LM324PWRG3 contains four independent, internally frequency-compensated amplifiers. Its 1.2 MHz gain-bandwidth product supports general-purpose closed-loop amplification, buffering, summing, and differential signal-processing tasks. A slew rate of 0.5 V/µs determines how rapidly the output can follow a changing input waveform, making the device appropriate for low-to-moderate-frequency analog circuits rather than high-speed signal paths.
The part operates from a single supply or split supply, which simplifies circuits operating from batteries, laboratory rails, industrial control systems, and mixed positive and negative analog supplies. The four independent amplifier sections allow common-mode and output-reference arrangements to differ between channels, although each section shares the device supply pins. Its general-purpose design favors straightforward signal conditioning over precision instrumentation performance.
Typical applications include four-channel sensor buffering, low-frequency active filtering, analog summing and subtraction, transducer signal conditioning, audio preamplification, and general feedback-control circuits. The integrated quad arrangement also reduces board area by replacing four separate single operational-amplifier packages. Each channel remains independently usable, so unused sections can be configured according to stable implementation guidance from the manufacturer datasheet.
When laying out the TSSOP-14 footprint, maintain short feedback and signal paths and place input-biasing components close to their associated amplifier pins. Check the configured gain against the 1.2 MHz gain-bandwidth product because practical bandwidth decreases as closed-loop gain rises. Also verify output swing, input common-mode range, supply voltage, and stability requirements for the selected feedback network before releasing the PCB.
This product page combines the manufacturer electrical characteristics with package details, application guidance, verified drop-in candidates, and design-focused selection criteria. It is intended to help engineers identify whether the LM324PWRG3’s four-channel general-purpose architecture fits a PCB and signal-chain requirement before requesting sourcing information.
直接替換替代品，適用於 LM324PWRG3 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LM324PWRG3 （相同外形與佔位） — 差異在於 Amplifier Type, Package Type, Package Width, RoHS Status, Slew Rate.
LM324PWRG4
✅ 直接替換聯絡詢價
查看資料表 →LM324KPWR
✅ 直接替換📋 參考替代品（不在目錄中）
LM324KPWE4
✅ 直接替換📋 參考替代品（不在目錄中）
LM324PWRG3 最大額定值與電氣特性
| Amplifier Type | General Purpose |
| Number of Circuits | 4 circuits |
| Number of Amplifiers | 4 amplifiers |
| Architecture | Four independent high-gain, frequency-compensated operational amplifiers |
| Gain-Bandwidth Product | 1.2 MHz |
| Slew Rate | 0.5 V/µs |
| Package Type | 14-TSSOP |
| Package Width | 0.173 in (4.40 mm) |
| Packaging | Tape and Reel |
| Supply Configuration | Single supply or split supply |
| RoHS 狀態 | RoHS-compliant |
| Lead-Free Status | Lead-free |
| 安裝類型 | Surface Mount |
LM324PWRG3 0.173 in (4.40 mm) 腳位配置指南
LM324PWRG3（0.173 in (4.40 mm) 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： LM324PWRG3.
請參閱 資料表 以查看完整腳位配置。
典型應用
LM324PWRG3 適用於 6 應用s: Four-Channel Sensor Signal Conditioning, Low-Frequency Active Filters, Audio Preamplification, Analog Summing and Mixing, Transducer and Bridge Measurement, Industrial Control and Feedback.
Four-Channel Sensor Signal Conditioning
The LM324PWRG3 fits four-channel sensor conditioning because each independent amplifier can buffer or amplify a separate low-frequency sensor signal while sharing one 14-TSSOP package. Its 1.2 MHz gain-bandwidth product provides useful closed-loop bandwidth for common temperature, pressure, and position transducers. The four sections also reduce board area compared with four individual packages. Designers should verify each channel’s input common-mode range against the actual sensor output and supply voltage, and use local resistor networks to set gain. The 0.5 V/µs slew rate is normally sufficient for slow sensor dynamics, but it limits performance when fast edges or large-amplitude steps are expected.
推薦
Low-Frequency Active Filters
LM324PWRG3 is appropriate for low-frequency active filtering when one board must implement several gain or filtering stages. Its four frequency-compensated amplifier sections support inverting, non-inverting, and multi-stage filter arrangements, while the 1.2 MHz gain-bandwidth product provides margin above typical audio and sensor-band filter requirements. The 0.5 V/µs slew rate helps preserve square-wave test responses at modest frequencies. Component tolerances and amplifier open-loop gain can shift filter poles, so simulate the closed-loop network and test stability with real board parasitics. Place feedback components close to the relevant pins and route sensitive input and output traces away from switching nodes.
推薦
Audio Preamplification
The LM324PWRG3 can support four general-purpose audio preamplifier paths in a compact 14-TSSOP footprint. Its 1.2 MHz gain-bandwidth product is well above the audio band, while the 0.5 V/µs slew rate supports ordinary audio signals when they remain within the output-voltage limits. The quad organization is useful for stereo and auxiliary-channel conditioning, provided each channel has its own input and feedback network. Designers should check gain-bandwidth margin at the selected closed-loop gain and keep the feedback loop short. Headroom calculations must include the input common-mode range and output swing at the actual supply voltage.
推薦
Analog Summing and Mixing
LM324PWRG3 suits analog summing, mixing, and difference-amplifier circuits where several independent inputs must be combined before conversion or measurement. Four amplifier sections allow a design to implement a summation stage, difference stage, and auxiliary channels without using separate packages. The 1.2 MHz gain-bandwidth product accommodates low-frequency control and instrumentation signals, while the 0.5 V/µs slew rate supports modest transient changes. Each summing node must remain inside the output swing range, and resistor matching directly affects gain accuracy. A practical layout should use matched resistor networks, solid ground returns, and short feedback routes to minimize offset and channel-to-channel interaction.
推薦
Transducer and Bridge Measurement
The LM324PWRG3 is appropriate for general-purpose transducer and bridge measurement front ends that operate at low frequencies. Four independent channels can handle excitation buffering, signal amplification, and auxiliary reference functions in a shared 14-TSSOP package. The 1.2 MHz gain-bandwidth product is sufficient for many resistive-sensor systems, and the 0.5 V/µs slew rate is normally non-limiting at slow measurement bandwidths. Bridge designs still require attention to common-mode range, excitation stability, and input offset error. Verify the sensor excitation level and the amplifier output range before committing the layout, and use guarding or grounded guard traces when high-impedance sensing paths are present.
推薦
Industrial Control and Feedback
LM324PWRG3 can implement several low-frequency control and feedback functions in industrial equipment because it combines four independent amplifiers in one surface-mount package. Typical uses include error amplifiers, actuator command buffers, threshold-shaping networks, and sensor-feedback channels. The 1.2 MHz gain-bandwidth product provides useful loop bandwidth for many slow control loops, while the 0.5 V/µs slew rate helps define achievable response to command changes. Control design must still account for output saturation, load capability, supply variation, and the bandwidth lost at higher closed-loop gain. Keep feedback compensation close to the device and test loop stability over the full process, load, and temperature range.
推薦
推薦產品摘要
工程參考資料，適用於 LM324PWRG3 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | LM324PWRG4 | LM324KPWR | LM324KPWE4 |
|---|---|---|---|---|
| Package | 14-TSSOP | 14-TSSOP | 14-TSSOP | 14-TSSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
主要差異化特點
- Four independent amplifiers in one compact package (對比LM2904PW)
- Confirmed 1.2 MHz gain-bandwidth product (對比LM324PWRG4)
- 0.5 V/µs slew rate for general-purpose signal paths (對比LM324KPWR)
設計說明
Route each inverting input, feedback component, and output as a compact loop with the shortest practical path between the LM324PWRG3 pins and associated passive parts. Longer feedback traces can add parasitic capacitance and reduce phase margin, especially at higher closed-loop gain. Keep analog input nets away from switching-node and high-current return paths, and use a continuous ground reference beneath the analog section when board-space conditions permit.
Check the selected closed-loop gain against the 1.2 MHz gain-bandwidth product rather than treating the amplifier as bandwidth-independent. A useful rule is that practical bandwidth decreases approximately as closed-loop gain increases. Also verify that expected input and output transitions remain compatible with the 0.5 V/µs slew rate. Add simulation or bench testing for large-signal settling, capacitive loading, and the complete feedback network.
Calculate worst-case package dissipation from the actual supply voltage, quiescent current, output current, and output voltage rather than using a single nominal value. For each amplifier channel, the approximate channel contribution is the voltage across the output stage multiplied by its load current; add the device quiescent dissipation for the total package estimate. Verify the result against the LM324 manufacturer datasheet limits for the exact revision and package.
Do not assume that all four amplifier sections can independently swing to the full supply rails. Confirm the input common-mode range and output swing at the selected supply voltage, including the load current. Single-supply designs often need biasing around the mid-supply point, while split-supply operation can simplify zero-centered signals. Also verify that unused channels are configured for stable operation rather than left open.
合規資訊
The component listing identifies LM324PWRG3 as a RoHS-compliant and lead-free green electronic component. No separate REACH, halogen-free, conflict-minerals, or automotive-qualification statement was identified.