LM2904QS-13 - 36V Dual Op Amp, 1.1MHz | Diodes Incorporated
MPN： LM2904QS-13 ✓ 啟用中LM2904QS-13 概覽
An operational amplifier, commonly called an op amp, is a high-gain differential amplifier whose closed-loop behavior is defined primarily by external feedback components. Within the semiconductor hierarchy, the LM2904QS-13 belongs to the operational amplifier, analog amplifier IC, and power-management-supporting signal-conditioning categories. It can amplify sensor outputs, implement active filters, buffer voltage references, and perform general-purpose analog conditioning where a wide supply range and dual-channel integration are useful.
Key characteristics include two independent amplifier circuits, a 36 V maximum supply, 1.1 MHz unity-gain bandwidth, 100 dB open-loop gain, 500 uA quiescent current, and a typical input bias current of 20 nA. These characteristics make the part appropriate for industrial control, instrumentation, automotive electronics, and appliance applications where two channels can reduce component count and board space. The automotive-compliant LM2904Q family is also manufactured with green mold compound as standard.
The LM2904 architecture supports single-supply operation as well as conventional dual-supply operation when negative supply voltage is available. Input and output common-mode limits must remain within the operating boundaries stated in the manufacturer datasheet. Because the amplifier is intended for broad-voltage applications, designers should distinguish the 36 V maximum supply rating from the usable output-swing and input-common-mode ranges; those ranges are not determined by the maximum supply alone.
Typical applications include sensor conditioning, current-loop receivers, active low-pass filters, audio and communications blocks, automotive electronics, industrial control modules, and general analog signal-conditioning boards. Two integrated channels are especially useful when a design requires closely related positive and negative signals, such as differential sensor outputs, dual-axis sensing, or paired audio paths. Local decoupling and careful trace routing remain important because high-gain amplifiers can amplify noise, oscillation, and unintended feedback caused by poor layout.
For stable operation, place the power-supply bypass capacitor close to the supply pins, keep feedback components compact, and route output signals away from high-impedance input nodes. Avoid placing long copper traces beneath the amplifier unless the layout specifically supports the intended thermal and electrical behavior. Check the complete pin assignment and exposed-package details against the manufacturer datasheet before finalizing a footprint or assembling a prototype.
This product page combines the LM2904QS-13 package and electrical identity, verified manufacturer documentation, same-footprint replacement guidance, application-specific engineering notes, and a parameter comparison intended to accelerate component selection. The primary decision factors are SO-8 footprint compatibility, supply voltage, unity-gain bandwidth, input bias current, quiescent current, and automotive qualification requirements.
直接替換替代品，適用於 LM2904QS-13 — 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： LM2904QS-13 （相同外形與佔位） — 差異在於 Package, Input Bias Current, Input Offset Voltage, Number of Channels.
LM2904S-13
✅ 直接替換聯絡詢價
查看資料表 →LM2904Q-13
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LM2904AQ-13
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LM2904AQS-13
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LM2904BIDR
✅ 直接替換聯絡詢價
查看資料表 →LM2904QS-13 最大額定值與電氣特性
| Amplifier Type | Dual general-purpose operational amplifier |
| Number of Channels | 2 circuits |
| Maximum Supply Voltage | 36 V |
| Unity-Gain Bandwidth | 1.1 MHz |
| Open-Loop Gain | 100 dB |
| 靜態電流 | 500 uA |
| Typical Input Bias Current | 20 nA |
| 封裝 | 8-pin SO-8 |
| Automotive Compliance | Automotive compliant |
| Mold Compound | Green mold compound |
| 安裝類型 | Surface mount |
| 腳位數 | 8 pins |
LM2904QS-13 腳位配置
| 腳位 1 | OUT1 — Output of amplifier channel 1 |
| 腳位 2 | IN1- — Inverting input of amplifier channel 1 |
| 腳位 3 | IN1+ — Non-inverting input of amplifier channel 1 |
| 腳位 4 | V- — Negative supply voltage |
| 腳位 5 | IN2+ — Non-inverting input of amplifier channel 2 |
| 腳位 6 | IN2- — Inverting input of amplifier channel 2 |
| 腳位 7 | OUT2 — Output of amplifier channel 2 |
| 腳位 8 | V+ — Positive supply voltage |
典型應用
LM2904QS-13 適用於 6 應用s: Automotive Sensor Conditioning, Industrial Current-Loop Receiver, Active Low-Pass Filter, Audio Preamplifier Stage, Battery-Powered Analog Monitor, Interface and Control Systems.
Automotive Sensor Conditioning
The LM2904QS-13 is suitable for conditioning signals from vehicle sensors because the LM2904Q family is automotive compliant and operates with up to a 36 V supply. Its two channels can amplify or buffer related sensor outputs while reducing discrete component count. The 1.1 MHz unity-gain bandwidth supports general-purpose low- to moderate-frequency analog signals, while the typical 20 nA input bias current is useful with high-impedance sources. Designers should verify common-mode range, output swing, noise, and automotive qualification for the specific vehicle platform.
推薦
Industrial Current-Loop Receiver
The LM2904QS-13 can serve as the amplifier in a 4-20 mA industrial current-loop receiver, where its 36 V supply tolerance accommodates wider interface voltage than low-voltage amplifier families. Two channels can process complementary or differential portions of the measurement chain. The 1.1 MHz bandwidth provides ample margin for many industrial process-control signals, while 500 uA quiescent current supports portable test equipment. Input protection, transient filtering, and precision resistors remain essential because industrial wiring can expose the amplifier to large voltage surges.
推薦
Active Low-Pass Filter
The LM2904QS-13 is suitable for an active low-pass filter because its 1.1 MHz unity-gain bandwidth and 100 dB open-loop gain provide useful loop gain within the frequency range of many sensor and control signals. Two channels allow a second-order filter or a matched conditioning stage to be implemented on the same board. Component tolerances should be considered when setting gain and cutoff frequency, and the amplifier output must remain within its specified swing under the selected supply and load conditions.
推薦
Audio Preamplifier Stage
The LM2904QS-13 can amplify low-level audio or intercom signals in industrial communication equipment because the dual-device configuration supports two channels in one package. Its 36 V maximum supply allows operation from a higher-voltage analog rail than many modern low-voltage amplifier families, and the 1.1 MHz bandwidth is adequate for many voiceband and wideband-audio conditioning paths. The design should include input coupling, gain-setting resistors, output loading, and stable feedback layout to avoid audible oscillation or unwanted noise amplification.
推薦
Battery-Powered Analog Monitor
The LM2904QS-13 fits battery-powered analog monitoring systems that need a dual amplifier, a relatively low 500 uA quiescent current, and tolerance for a supply up to 36 V. The typical 20 nA input bias current helps reduce disturbance in high-impedance sensor circuits. During design, calculate total supply consumption including feedback networks and load current, then verify startup behavior and output settling. The SO-8 package supports compact PCB layouts while still requiring careful thermal and grounding practices.
推薦
Interface and Control Systems
The LM2904QS-13 can amplify control-loop errors or buffer reference and feedback signals in industrial and appliance interface boards. Two channels make it practical to condition one input while providing a complementary or cascaded stage, reducing board area. Its 100 dB open-loop gain is useful in feedback-controlled amplifier configurations, while the 36 V supply rating offers flexibility around legacy 24 V control systems. The selected resistor network, load, and common-mode operating point must be checked against the datasheet limits.
推薦
推薦產品摘要
工程參考資料，適用於 LM2904QS-13 — 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 | LM2904S-13 | LM2904Q-13 | LM2904AQ-13 | LM2904AQS-13 | LM2904B |
|---|---|---|---|---|---|---|
| Manufacturer | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Texas Instruments |
| Package | 8-pin SO-8 | 8-pin SO-8 | 8-pin SO-8 | 8-pin SO-8 | 8-pin SO-8 | 8-pin SOIC-8 |
| Amplifier Channels | 2 | 2 | 2 | 2 | 2 | 2 |
| Maximum Supply Voltage | 36 V | 36 V | 36 V | 36 V | 36 V | 36 V |
| Unity-Gain Bandwidth | 1.1 MHz | 1.1 MHz | 1.1 MHz | 1.1 MHz | 1.1 MHz | 1.2 MHz |
主要差異化特點
- Automotive-compliant dual amplifier family (對比LM2904S-13)
- 36 V supply capability in a dual SO-8 package (對比LM2904B)
- Wide-bandwidth general-purpose signal conditioning (對比LM2904S-13)
- Low bias current for higher-impedance analog sources (對比LM2904B)
設計說明
Place the supply-bypass capacitor immediately across the V+ and V- pins, with the shortest possible ground return. Connect feedback resistors close to the relevant input and output pins, and keep the inverting-input node as small as practical. Long output traces and parallel routing beneath the SO-8 package can increase coupling into high-impedance inputs and contribute to instability in high-gain configurations.
Do not treat the 36 V maximum supply rating as the permitted input or output range. Before selecting resistor values, confirm that the input common-mode voltage, output swing, supply differential, and output-current conditions remain within the manufacturer limits. This is especially important in 24 V industrial systems where transients may exceed the nominal rail and additional input protection may be required.
Use a solid ground plane and provide a low-impedance return for both supply bypass capacitors. If the circuit handles high-impedance sources, guard sensitive input traces with a grounded guard ring when electrically appropriate and keep switching nodes and clock lines away from the amplifier. The typical 20 nA input bias current makes input-source impedance relevant, but leakage from PCB contamination can dominate at very high impedances.
Estimated: with a 24 V supply, a 5 V output, and 1 A output current, the amplifier would dissipate approximately 19 W. That estimate is based on the input-output difference and load current, not a datasheet thermal rating, and is generally unsuitable for an 8-pin SO-8 package without substantial copper and careful ambient-temperature analysis. Use lower output current or a switching regulator when the voltage drop and load are high.
The LM2904QS-13 contains two independent channels but shares the same power pins. Keep the two channel layouts electrically separate where possible, particularly their high-impedance inputs and feedback networks. Route output returns directly to the device and avoid sharing narrow copper paths between channels. This reduces channel interaction and makes measured noise and crosstalk behavior easier to identify during validation.
合規資訊
The manufacturer describes the LM2904Q family as automotive compliant and states that green mold compound is used as standard. Specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals statements require confirmation from the ordering or compliance documentation.
