LM324MT - Low-Power Quad Op Amp, 14-TSSOP | Texas Instruments
MPN: LM324MT ✓ Hoạt độngLM324MT Tóm tắt
An operational amplifier is a voltage-gain device used to amplify, buffer, filter, or compare analog signals. A quad operational amplifier contains four amplifiers in one integrated circuit. Within the signal-chain hierarchy, an operational amplifier belongs to the amplifier-IC family and, more broadly, to analog and mixed-signal semiconductor devices. The LM324MT is designed for applications operating from a single power supply, which simplifies circuit design in systems without a negative supply rail.
The LM324MT provides four amplifier sections in one 14-TSSOP package. Its low-power operating concept is useful when four analog channels are required in compact equipment. The 0°C to 70°C rating identifies it as a commercial-temperature device, so system designers should verify that the enclosure temperature remains within this range. The manufacturer identifies the LM324 as a low-power quad operational amplifier intended for single power-supply operation.
Compared with discrete single amplifier packages, integrating four amplifiers into one TSSOP-14 package can simplify assembly and conserve board area. Designers should still account for shared supply pins, input bias currents, output-current limits, input common-mode range, output swing, stability with the selected load, and the behavior of unused amplifier channels. These operating limits must be confirmed against the manufacturer datasheet for the selected electrical grade and package.
Typical uses include four-channel sensor conditioning, buffered analog measurement, low-frequency active filtering, voltage comparison, general-purpose signal amplification, and educational or laboratory analog circuits. The single-supply architecture is particularly useful in battery-powered and compact embedded systems where a negative rail is unavailable. Input and output signal ranges must remain within the limits required by the circuit.
Layout should place input components close to the associated amplifier pins and maintain short feedback paths. Bypass the supply pins with a suitable local decoupling network, keep sensitive inputs away from switching nodes and high-current return paths, and account for the thermal limits of the TSSOP package. Unused amplifier inputs should be connected to a defined common-mode potential rather than left floating.
This product page combines the manufacturer product information, distributor package identification, cross-reference results, application guidance, and a practical comparison of same-package LM324-family choices. It is designed to help engineers evaluate the LM324MT for signal-conditioning and general analog applications while making package and sourcing requirements explicit.
Bộ thay thế dễ dàng lắp đặt cho LM324MT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LM324MT (cùng hình factor và footprint) — khác nhau ở Amplifier Type, Package.
LM324MT/NOPB
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM324PWR
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LM324PW
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →LM324APWR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM324MT Tỷ lệ tối đa & tính chất điện
| Amplifier Type | Quad operational amplifier |
| Number of Amplifier Channels | 4 channels |
| Power Supply Type | Single supply |
| Khoảng nhiệt độ hoạt động | 0°C to 70°C |
| Hộp | 14-TSSOP |
| Total Pin Count | 14 pins |
| Kiểu lắp đặt | Surface mount |
| AEC-Q100 Qualification | Not applicable |
Cấu hình chân LM324MT
| Chân 1 | OUT1 — Amplifier 1 output |
| Chân 2 | IN1- — Amplifier 1 inverting input |
| Chân 3 | IN1+ — Amplifier 1 non-inverting input |
| Chân 4 | V+ — Positive supply connection |
| Chân 5 | IN2+ — Amplifier 2 non-inverting input |
| Chân 6 | IN2- — Amplifier 2 inverting input |
| Chân 7 | OUT2 — Amplifier 2 output |
| Chân 8 | OUT3 — Amplifier 3 output |
| Chân 9 | IN3- — Amplifier 3 inverting input |
| Chân 10 | IN3+ — Amplifier 3 non-inverting input |
| Chân 11 | V- — Negative supply or ground connection |
| Chân 12 | IN4+ — Amplifier 4 non-inverting input |
| Chân 13 | IN4- — Amplifier 4 inverting input |
| Chân 14 | OUT4 — Amplifier 4 output |
Ứng dụng tiêu biểu
LM324MT phù hợp cho 6 Áp dụngs: Four-Channel Sensor Conditioning, Battery-Powered Analog Measurement, Low-Frequency Active Filtering, Buffered Analog Multiplexer Output, Voltage Threshold and Comparator Circuits, Industrial Control and Instrumentation.
Four-Channel Sensor Conditioning
The Texas Instruments LM324MT is well suited to four-channel sensor conditioning because it combines 4 amplifier sections in one 14-TSSOP package. Each channel can provide buffering or gain around a low-frequency sensor signal while the device operates from a single supply. The 0°C to 70°C specification fits controlled commercial equipment, and the low-power quad design reduces package count compared with four separate single amplifiers. The circuit must bias sensor outputs into the supported common-mode range, check offset and bias current, and verify that the output swing remains valid at the chosen supply voltage.
Được đề xuất
Battery-Powered Analog Measurement
LM324MT supports compact, battery-powered analog measurement systems that lack a negative supply rail. Its 4 channels and single-supply operating concept allow multiple measurements to share one package, while the 14-TSSOP footprint supports dense surface-mount layouts. The 0°C to 70°C range is suitable for ordinary indoor commercial equipment. Designers should verify quiescent current, supply-voltage limits, input offset, and input bias current against the battery operating range. They should also keep sensor outputs inside the common-mode input range and include gain-setting resistors with tolerances appropriate to measurement accuracy.
Được đề xuất
Low-Frequency Active Filtering
The Texas Instruments LM324MT can implement low-frequency active filters and signal conditioners because it provides 4 amplifier channels in a 14-TSSOP package. A quad device is useful for cascaded stages, multi-pole filters, or parallel conditioning paths while conserving PCB area. The single-supply architecture simplifies the circuit when negative supply generation is undesirable. Component selection must account for the closed-loop gain, gain-bandwidth product, phase margin, output loading, and output-current demand. Confirm the relevant electrical limits in the manufacturer datasheet and add output isolation when driving capacitive loads.
Được đề xuất
Buffered Analog Multiplexer Output
LM324MT can provide buffering for a multiplexer, sensor selector, or resistive ladder where four analog outputs require independent low-frequency conditioning. Integrating 4 amplifiers in one 14-TSSOP package reduces the number of external packages and makes routing to a following converter or controller more consistent. Designers should use the manufacturer pin-description table to assign channels correctly and verify input bias-current effects on high-impedance sources. The 0°C to 70°C range supports conventional commercial environments, while the actual signal bandwidth and settling behavior must remain within the amplifier's electrical characteristics.
Được đề xuất
Voltage Threshold and Comparator Circuits
The LM324MT's four channels are useful for threshold, window-detection, and control-feedback circuits built around single-supply operation. Multiple independent amplifier sections can monitor different nodes without requiring four separate packages, and the 14-TSSOP format supports compact control boards. A practical design must establish a stable reference within the amplifier's common-mode range and account for input offset because it directly shifts the switching threshold. Output state and pull-up requirements should also be checked against the device's output-current and output-swing limits before using the output to drive another logic device.
Được đề xuất
Industrial Control and Instrumentation
LM324MT fits general industrial control and instrumentation blocks requiring 4 low-frequency analog channels in a 14-TSSOP package. Possible uses include transducer conditioning, actuator feedback monitoring, and current-voltage signal interfaces. The device is identified for a 0°C to 70°C operating range, making it appropriate for controlled indoor equipment rather than exposed automotive or extreme industrial environments. Engineers should verify supply immunity, input range, output swing, channel behavior, and thermal performance for the exact implementation. Local supply decoupling and careful grounding are essential when control circuitry shares a board with switching power stages.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LM324MT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | LM324MT/NOPB | LM324PWR | LM324PW | LM324APWR |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-TSSOP | 14-TSSOP | 14-TSSOP | 14-TSSOP | 14-TSSOP |
| Amplifier Configuration | Quad operational amplifier | Quad operational amplifier | Quad operational amplifier | Quad operational amplifier | Quad operational amplifier |
| Number of Channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels |
| Mounting Type | Surface mount | Surface mount | Surface mount | Surface mount | Surface mount |
Bảo phân biệt quan trọng
- Four integrated amplifier channels (vsLM2904P3)
- Direct same-package ordering option (vsLM324MT/NOPB)
- Single-supply general-purpose analog conditioning (vsLM324APWR)
Ghi chú thiết kế
Connect the supply pins to a low-impedance source and place the local bypass capacitor directly beside the device. Because LM324MT supports single-supply operation, the pin marked V- is normally tied to ground in that configuration. Confirm the exact minimum supply voltage, quiescent current, and output-current limits in the manufacturer datasheet. These checks are important when the same 14-TSSOP footprint is also used by an ordering code with different electrical limits.
Place input resistors, feedback components, and reference networks close to their associated LM324MT pins. Keep the four amplifier channels physically separated when one channel handles a high-level signal and another handles a sensitive low-level input. Maintain a continuous ground return beneath the device, avoid routing inputs beside supply and switching-current paths, and use a stable low-impedance ground reference. The 14-TSSOP footprint provides four channels in a compact package, so disciplined placement can prevent channel-to-channel interference.
Do not leave unused LM324MT inputs floating. Connect each unused channel's non-inverting input to a defined common-mode voltage, normally ground for a single-supply circuit, and configure the inverting input through an appropriate feedback network. Also verify that input signals remain within the common-mode range and that output swing supports the intended load. The 0°C to 70°C rating does not describe common-mode limits or supply limits; those must be checked separately for the exact ordering code.
Thông tin tuân thủ
The LM324 family is not identified as an automotive-qualified AEC-Q100 product in the available information. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status require confirmation from the exact ordering code and current manufacturer documentation.