LM324MTX/NOPB - Quad 1 MHz Op Amp | Texas Instruments
料号： LM324MTX/NOPB ✓ 量产中LM324MTX/NOPB 概述
An operational amplifier is a voltage-controlled differential amplifier used to amplify, buffer, filter, or compare analog signals. The LM324 family belongs to the operational-amplifier hierarchy within analog ICs and analog signal-chain components. Its internal frequency compensation removes the need for external compensation networks in conventional closed-loop gain configurations, simplifying implementation in general-purpose amplifier boards.
The quad configuration provides four amplifiers in one package, reducing PCB area and component count in designs requiring multiple analog channels. Key electrical characteristics include 1 MHz gain-bandwidth product, 0.3 V/µs slew rate, 20 nA input bias current, and 1 mV input offset voltage. The output stage can supply up to 40 mA per channel, while the low-power architecture supports portable and single-supply systems operating from 3 V to 32 V.
Internal frequency compensation makes the amplifier suitable for voltage gains near unity without external compensation capacitors. The 1 MHz bandwidth places the device in the general-purpose, low-to-moderate-frequency class rather than the precision or high-speed class. Designers should account for finite bandwidth and slew rate when processing larger or faster signals, and should verify output swing against the selected supply voltage before driving a load.
Typical uses include four-channel sensor conditioning, low-frequency active filters, general-purpose signal buffers, differential-to-single-ended conversion, and instrumentation interfaces. The four independent channels can also be configured as two differential amplifiers when signal polarity relationships require it. The 14-TSSOP package is appropriate for compact surface-mount assemblies, although its narrow lead pitch requires careful PCB layout and inspection.
For reliable layout, route input and feedback connections away from switching nodes and high-current return paths. Place input-biasing resistors close to the amplifier inputs to reduce leakage sensitivity, and use short feedback traces to minimize parasitic capacitance. Because this is a general-purpose amplifier rather than a rail-to-rail precision device, input common-mode range and output swing must be checked in the actual supply configuration.
This page combines the LM324MTX/NOPB electrical characteristics, package information, drop-in alternatives, comparison data, and practical PCB guidance to support faster component selection and implementation. Use the manufacturer pin-description table and recommended operating conditions when assigning PCB tracks and validating signal headroom.
直接替换替代料： LM324MTX/NOPB ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
LPV324MTX/NOPB
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TLV324MT/NOPB
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LM324MTX/NOPB 最大额定值与电气特性
| Amplifier Type | General-purpose, low-power operational amplifier |
| Number of Circuits | 4 circuits |
| Architecture | Four independent, internally frequency-compensated amplifiers |
| Supply Voltage Range | 3 V to 32 V |
| Gain-Bandwidth Product | 1 MHz |
| Slew Rate | 0.3 V/µs |
| Input Bias Current | 20 nA |
| Input Offset Voltage | 1 mV |
| Maximum Output Current per Channel | 40 mA |
| 封装 | 14-TSSOP, 0.173 inch / 4.40 mm width |
| 安装类型 | Surface mount |
| Shipping Package | Tape and reel (TR) |
LM324MTX/NOPB tape and reel (tr) 引脚配置指南
LM324MTX/NOPB（tape and reel (tr) 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： LM324MTX/NOPB.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LM324MTX/NOPB 适用于 6 应用s: Low-Frequency Sensor Conditioning, Active Audio and Control Filters, General-Purpose Signal Buffering, Portable Battery-Powered Analog Circuits, Industrial Control Signal Conditioning, Test and Measurement Front Ends.
Low-Frequency Sensor Conditioning
The LM324MTX/NOPB is appropriate for conditioning resistive, temperature, and industrial sensor outputs when the signal bandwidth is far below the device's 1 MHz gain-bandwidth product. Each of the four internally compensated channels can amplify a low-level sensor signal with a closed-loop gain selected by external resistors. The 20 nA input bias current is important for high-impedance sources, while the 1 mV input offset establishes the baseline error engineers must include in accuracy calculations. Designers should verify input common-mode range and output swing against the sensor excitation before committing the circuit.
推荐
Active Audio and Control Filters
The LM324MTX/NOPB can implement low-frequency active filter stages because its 1 MHz gain-bandwidth product provides ample closed-loop bandwidth for audio-band and industrial-control corner frequencies. The 0.3 V/µs slew rate helps preserve low-distortion output for moderate-amplitude signals, while internal frequency compensation simplifies basic non-inverting and inverting amplifier configurations. Four independent channels make cascaded sections practical. Engineers should calculate maximum signal amplitude and gain so that the 0.3 V/µs slew rate does not become the limiting factor and should confirm output headroom.
推荐
General-Purpose Signal Buffering
The LM324MTX/NOPB is well suited to buffering sensor outputs, ADC driver inputs, and control signals where a higher input impedance or adjustable offset is required. Its four independent channels allow one package to replace several discrete single amplifiers, while the 40 mA per-channel output capability provides useful drive for moderate loads. A unity-gain buffer configuration remains well within the 1 MHz bandwidth limit, but input offset and bias currents still contribute to total error. Keep feedback loops short and check capacitive loading for stability.
推荐
Portable Battery-Powered Analog Circuits
The LM324MTX/NOPB supports battery-powered instrumentation because it can operate from a single supply starting at 3 V. The low-power general-purpose architecture provides four channels without requiring negative supplies for many input and output arrangements. Its 1 MHz gain-bandwidth product is appropriate for low-frequency health-monitoring, portable instrumentation, and measurement loops rather than high-speed waveform processing. Because the broad 3 V to 32 V rating does not imply rail-to-rail operation, the actual input common-mode range and output swing must remain inside the usable signal region.
推荐
Industrial Control Signal Conditioning
The LM324MTX/NOPB fits 3 V to 32 V industrial control circuits that require amplification, comparison, or current-to-voltage conversion of slow control signals. Its four independent channels can process several sensing or actuation paths in one package, and the 1 MHz bandwidth is more than sufficient for many process-control loops. The 20 nA input bias current supports relatively high source impedances, while the 1 mV offset may require calibration in precision measurements. PCB layout should isolate sensitive input traces from motors, relays, and high-current switching paths.
推荐
Test and Measurement Front Ends
The LM324MTX/NOPB can form the input-conditioning section of a general-purpose test and measurement instrument when the measured bandwidth is below 1 MHz. Four channels support differential measurements, excitation buffering, midpoint references, and gain stages within one 14-TSSOP package. The 0.3 V/µs slew rate is suitable for many low-frequency sine and triangular waveforms, but engineers must limit amplitude or bandwidth when the required output cannot be reached. Low-noise layout, grounded reference connections, and short feedback paths help preserve measurement fidelity.
推荐
推荐产品汇总
工程参考数据： LM324MTX/NOPB ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | LPV324MTX/NOPB | TLV324MT/NOPB | LM324MTX |
|---|---|---|---|---|
| Package | 14-TSSOP | 14-TSSOP | 14-TSSOP | 14-TSSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | ROHM Semiconductor |
| Number of Amplifiers | 4 circuits | 4 circuits | 4 circuits | 4 circuits |
关键差异点
- Broad single-supply operating range （对比 TLV324MT/NOPB)
- Matched core performance from a cross-brand source （对比 LM324MTX)
- Four independent channels in one compact package （对比 Single-channel general-purpose alternatives)
设计说明
Use the manufacturer pin-description table to assign all 14 TSSOP connections and verify that the selected land pattern corresponds to the 14-pin package. Place each amplifier's input and feedback components close to their associated pins, and avoid routing high-impedance input traces beneath power or switching nets. The LM324MTX/NOPB includes four independent amplifiers in one package, so partitioning each channel's critical analog path can prevent coupling between measurement channels.
The 1 MHz gain-bandwidth product and 0.3 V/µs slew rate set the usable bandwidth and large-signal response limits. For a closed-loop gain of G, the approximate small-signal bandwidth is 1 MHz divided by G, while the required slew rate rises with output amplitude and frequency. Check these calculations before using the amplifier with fast edges or large waveforms. If the source can present significant capacitance, add isolation resistance and verify stability on the assembled board.
Do not assume that the 3 V to 32 V supply rating makes the LM324MTX/NOPB rail-to-rail. Confirm the usable input common-mode range and output swing for the selected supply, especially near 3 V or 5 V. Also account for the 1 mV input offset and 20 nA input bias current in precision measurements. For high-impedance sources, use guarding or insulation techniques and keep board contamination away from the input pins.
合规信息
The LM324MTX/NOPB is a general-purpose commercial operational amplifier rather than an automotive-qualified AEC-Q100 device. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status were not established by the cited ordering information.
