LM324DTBR2 - 3-32V Quad Op Amp | onsemi | TSSOP-14
MPN： LM324DTBR2 ✓ 啟用中LM324DTBR2 概覽
An operational amplifier, commonly abbreviated op amp, is an analog semiconductor that amplifies the difference between two input voltages. The LM324 belongs to the broader operational amplifier -> voltage amplifier -> analog IC hierarchy. Its four independent channels make it efficient for designs requiring several analog functions on one board, while its wide supply range permits operation from low-voltage systems through industrial 24 V rails.
The principal benefits are the integrated quad-channel configuration, a 3 V to 32 V operating range, and a 5 mV maximum input offset voltage. True differential inputs support input signals referenced to ground in single-supply systems. Its general-purpose architecture also makes it suitable for noninverting and inverting amplifiers, voltage followers, comparators, current-to-voltage conversion, and basic sensor interfaces when precision and speed requirements are modest.
Internally, each channel provides differential input and single-ended output operation. The four channels share a common supply connection, while their input stages accept signals from ground to near the positive supply. Because the LM324 is intended primarily for low-cost, general-purpose designs, the application should not assume precision, high speed, rail-to-rail output, or low-noise operation unless those characteristics are separately confirmed for the selected device.
Typical uses include four-channel sensor conditioning, industrial control interfaces, low-frequency audio signal paths, battery-powered monitoring equipment, and general analog measurement systems. In a single-supply circuit, designers should bias non-inverting inputs above ground to provide an operating common-mode range. The device is also useful in multiple independent gain stages where using four separate packages would increase board area and cost.
A primary design consideration is to keep the input and feedback networks close to the amplifier pins and maintain adequate supply bypassing. The wide supply capability does not remove the need for stable reference and feedback components. Verify input offset, input bias current, output swing, gain-bandwidth, noise, and temperature limits against the manufacturer datasheet before using the LM324 for precision or safety-critical measurements.
This page organizes the verified product identity, package information, sourcing questions, cross-reference alternatives, and practical circuit guidance into one engineering reference. It also distinguishes true same-package drop-in candidates from broader LM324 functional equivalents, helping designers avoid packages that require PCB changes.
直接替換替代品，適用於 LM324DTBR2 — 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： LM324DTBR2 （相同外形與佔位） — 差異在於 Input Offset Voltage, Package, Amplifier Type, Input Type, Supply Voltage Range.
LM324APWR
✅ 直接替換📋 參考替代品（不在目錄中）
LM324DT
✅ 直接替換✗ 缺貨
$0.0827 / 單位
查看資料表 →LM324DTBR2G
✅ 直接替換聯絡詢價
查看資料表 →LM324DTB
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LM324DR
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LM324DTBR2 最大額定值與電氣特性
| Product Type | Quad operational amplifier |
| Amplifier Circuit Count | 4 circuits |
| Supply Voltage Range | 3 V to 32 V |
| Input Offset Voltage | 5 mV maximum |
| Input Type | True differential inputs |
| Product Classification | Standard general-purpose amplifier |
| 封裝 | 14-pin TSSOP |
| 安裝類型 | Surface mount |
| Channel Count | 4 |
| Supply Type | Single supply |
LM324DTBR2 腳位配置
| 腳位 1 | OUT1 — Output of amplifier 1 |
| 腳位 2 | IN1- — Inverting input of amplifier 1 |
| 腳位 3 | IN1+ — Non-inverting input of amplifier 1 |
| 腳位 4 | GND — Ground connection |
| 腳位 5 | IN2+ — Non-inverting input of amplifier 2 |
| 腳位 6 | IN2- — Inverting input of amplifier 2 |
| 腳位 7 | OUT2 — Output of amplifier 2 |
| 腳位 8 | OUT3 — Output of amplifier 3 |
| 腳位 9 | IN3- — Inverting input of amplifier 3 |
| 腳位 10 | IN3+ — Non-inverting input of amplifier 3 |
| 腳位 11 | GND — Ground connection |
| 腳位 12 | IN4+ — Non-inverting input of amplifier 4 |
| 腳位 13 | IN4- — Inverting input of amplifier 4 |
| 腳位 14 | OUT4 — Output of amplifier 4 |
典型應用
LM324DTBR2 適用於 6 應用s: Industrial Sensor Conditioning, Low-Frequency Audio Signal Paths, Single-Supply Data Acquisition, Battery-Powered Monitoring Equipment, Power-Supply Monitoring and Control, General-Purpose Control and Interface Circuits.
Industrial Sensor Conditioning
The onsemi LM324DTBR2 fits four-channel industrial sensor conditioning when each signal requires modest amplification and the application operates from a 3 V to 32 V supply. Its four true-differential amplifier channels can process temperature, pressure, position, and level signals while reducing the number of packages on the controller board. The 5 mV maximum input offset is usable for coarse measurements, although calibration may be necessary. Use ground-referenced or biased inputs within the common-mode range, keep feedback resistors close to the pins, and bypass the supply to prevent switching noise from entering the measurement channels.
推薦
Low-Frequency Audio Signal Paths
The LM324DTBR2 can implement low-frequency mixer, preamplifier, headphone-driver, and equalizer functions when wide bandwidth and low distortion are not required. Four amplifiers in one 14-pin TSSOP allow a stereo board to use fewer packages. Its 3 V to 32 V supply range covers portable and higher-voltage audio systems, while the 5 mV maximum input offset is generally acceptable for ordinary audio paths. Keep input and feedback networks compact, provide stable supply bypassing, and verify output swing because the LM324 is not a rail-to-rail precision audio amplifier.
推薦
Single-Supply Data Acquisition
For a single-supply acquisition frontend, the LM324DTBR2 offers four true-differential input channels and operation across 3 V to 32 V, simplifying analog conditioning around sensors, dividers, and converters. Each channel can buffer a source or form a noninverting stage, although inputs near ground must remain above the usable common-mode boundary. The 5 mV maximum input offset should be included in the error budget for high-resolution measurements. Place input resistors and feedback networks close to the device, bypass the supply locally, and select a more precise amplifier when offset drift materially affects the result.
推薦
Battery-Powered Monitoring Equipment
The LM324DTBR2 is suitable for portable monitoring equipment that requires four analog channels and can operate from a 3 V supply. It can amplify sensor outputs, implement threshold comparators, and provide voltage buffering within one TSSOP package. Low-voltage operation reduces system complexity compared with requiring multiple higher-voltage amplifiers. Because the LM324 is a general-purpose amplifier, evaluate input bias current, output swing, and supply-current requirements carefully at the lowest system voltage; add a midpoint reference when the source signal can sit at ground.
推薦
Power-Supply Monitoring and Control
The LM324DTBR2 can condition voltage-divider outputs, current-sense signals, and comparator thresholds in a 24 V industrial control system. Its supply range extends to 32 V, allowing operation directly from many 24 V rails after suitable input conditioning. Four channels can implement redundant measurements or multiple threshold detectors without requiring four packages. The 5 mV maximum input offset may be acceptable in supervisory loops, but protection and isolation functions demand careful component selection. Keep high-voltage nodes away from sensitive feedback traces and follow the absolute-maximum ratings stated in the manufacturer datasheet.
推薦
General-Purpose Control and Interface Circuits
The LM324DTBR2 is well suited to comparators, relay drivers, current-to-voltage converters, and general feedback loops in non-safety-critical control equipment. Four independent channels make it economical for implementing several analog functions on one board. Its true-differential inputs support both grounded and biased signal arrangements, and operation up to 32 V covers many industrial interfaces. Verify that output current, output swing, and input common-mode range satisfy the load and signal levels. For precision current sensing or safety-related decisions, use an amplifier with tighter offset, drift, and output-drive specifications.
推薦
推薦產品摘要
工程參考資料，適用於 LM324DTBR2 — 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 | LM324APWR | LM324DT | LM324DTBR2G | LM324DTB | LM324DR |
|---|---|---|---|---|---|---|
| Package | 14-pin TSSOP | 14-pin TSSOP | 14-pin TSSOP | 14-pin TSSOP | 14-pin TSSOP | 14-pin TSSOP |
| Brand | onsemi | Texas Instruments | Texas Instruments | onsemi | onsemi | Texas Instruments |
| Mounting Type | Surface mount | Surface mount | Surface mount | Surface mount | Surface mount | Surface mount |
主要差異化特點
- Four-channel integration in one 14-pin TSSOP (對比LM324APT)
- Wide single-supply operating range (對比LM324APWR)
- True differential inputs for grounded signal conditioning (對比LM324DTBR2G)
設計說明
Do not assume that every LM324-family order code is a footprint-compatible replacement. Confirm the 14-pin TSSOP land pattern, lead pitch, pin-one orientation, and electrical limits for the exact alternative. Also verify the input common-mode range at the lowest supply voltage. A source centered at ground can move outside the usable input range, so bias non-inverting inputs above ground when the LM324 is powered from a single supply.
Place input, feedback, and compensation components close to their associated TSSOP pins to minimize parasitic capacitance and feedback-loop area. Route the ground return directly to the device ground pin and bypass the supply with a local high-frequency capacitor plus a suitable bulk capacitor. Keep sensitive input traces away from switching nodes and high-current paths. Good grounding is especially important because four amplifier channels in one package share common supply and ground connections.
Include the device's quiescent current, output-stage current, and load current when sizing the supply. The LM324DTBR2 can operate from 3 V to 32 V, but acceptable supply voltage does not guarantee the same output swing across the full range. Check output swing, output-current capability, and thermal performance at the intended load. For a bipolar output stage, the output may not reach either supply rail, so leave the required headroom in the circuit design.
Use stable resistor networks for gain-setting and feedback, and avoid excessive source impedance at the input because bias-current effects can create offset. For small-signal stages, check the gain-bandwidth product, slew rate, noise, and output-current limits against the intended signal bandwidth. The 5 mV maximum input offset may be acceptable for general-purpose control but can dominate the error budget of a precision bridge or sensor interface.
合規資訊
Compliance declarations require confirmation from the manufacturer datasheet or product documentation for the exact ordering code. The LM324DTBR2 is a general-purpose commercial amplifier and is not identified as an automotive-qualified AEC-Q100 device.
