LM2902QDRQ1 - 26V Automotive Quad Op Amp | Texas Instruments
MPN： LM2902QDRQ1 ✓ 啟用中LM2902QDRQ1 概覽
An operational amplifier is a high-gain, frequency-compensated analog IC that amplifies the difference between two input voltages. Quad operational amplifiers combine four amplifiers in one package, providing a compact solution for multiple signal channels. Within the broader semiconductor hierarchy, the LM2902-Q1 is a linear integrated circuit and operational amplifier intended for precision control, measurement, buffering, and general-purpose analog signal processing.
Key characteristics include four independent amplifier sections, a 26 V maximum supply span, 1.2 MHz gain-bandwidth product, and 2 mV input offset voltage. The wide supply range allows operation from single or split supplies when the total voltage across the amplifier complies with device limits. The automotive-qualified Q1 grade extends the operating-temperature range to -40°C through 125°C for use in demanding vehicle and industrial environments.
The internally frequency-compensated architecture simplifies implementation because external compensation components are not required for typical closed-loop gains. Each amplifier can independently handle input, output, and feedback connections, allowing one package to serve several channels of a control or measurement system. Designers should still account for input common-mode range, output swing, noise, stability, and the input bias-current error when selecting feedback and source impedances.
Typical uses include 12 V and 24 V automotive sensor interfaces, actuator-driver signal conditioning, transducer amplification, current sensing, voltage comparison, and industrial control modules. The 60 mA output capability is useful for driving moderate loads, while the 1.2 MHz bandwidth is appropriate for low- and intermediate-frequency analog signals rather than high-speed waveform or video applications.
The principal design consideration is the 26 V maximum supply rating. Board designers should leave transient margin for automotive and industrial supply variation, route sensitive input signals away from switching nodes, and verify that connected sensors or feedback networks do not exceed the input and output limits. Decoupling capacitors should be placed close to the supply pins, and unused amplifier sections should be configured according to the manufacturer datasheet.
This page combines the LM2902-Q1 product specifications, package information, candidate drop-in references, application guidance, and design considerations. It supports faster part selection while directing engineers to the manufacturer product page and datasheet for final qualification, pin assignment, and lifecycle decisions.
直接替換替代品，適用於 LM2902QDRQ1 — 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： LM2902QDRQ1 （相同外形與佔位） — 差異在於 Maximum Supply Voltage, Package, Amplifier Type, Input Offset Voltage, Input Type.
LM2902DR
✅ 直接替換聯絡詢價
查看資料表 →LM2902DRE4
✅ 直接替換聯絡詢價
查看資料表 →LM2902VDR2G
✅ 直接替換聯絡詢價
LM2902DR2G
✅ 直接替換聯絡詢價
查看資料表 →NCV2902DR2G
✅ 直接替換📋 參考替代品（不在目錄中）
LM2902QDRQ1 最大額定值與電氣特性
| Number of Amplifiers | 4 independent amplifiers |
| Product Type | Quad operational amplifier |
| Maximum Supply Voltage | 26 V |
| Minimum Supply Voltage | 3 V |
| Gain-Bandwidth Product | 1.2 MHz |
| Input Offset Voltage | 2 mV |
| Output Current per Channel | 60 mA |
| Supply Current per Channel | 1.4 mA |
| 工作溫度 | -40°C to 125°C |
| Automotive Qualification | Qualified |
| Compensation | Internal frequency compensation |
| 封裝 | 14-pin SOIC (D) |
| 安裝類型 | Surface mount |
LM2902QDRQ1 14-pin soic (d) 腳位配置指南
LM2902QDRQ1（14-pin soic (d) 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： LM2902QDRQ1.
請參閱 資料表 以查看完整腳位配置。
典型應用
LM2902QDRQ1 適用於 6 應用s: Automotive Sensor Signal Conditioning, 24 V Industrial Control Inputs, Current-Shunt Amplification, Transducer Amplification, Actuator and Driver Signal Conditioning, Precision Voltage Comparison.
Automotive Sensor Signal Conditioning
The LM2902QDRQ1 fits four-channel automotive sensor conditioning because its four independent amplifiers operate from a 3 V to 26 V supply and are qualified for operation from -40°C to 125°C. A 12 V vehicle system can use the available headroom for regulated sensor excitation and signal amplification, while the 2 mV input offset helps preserve the accuracy of pressure, temperature, or position sensing signals. The 60 mA output current per channel is suitable for moderate input loads, and the 1.2 MHz gain-bandwidth product supports low-frequency sensor signals. The design should include input clamping, transient protection, and clean supply decoupling.
推薦
24 V Industrial Control Inputs
The LM2902QDRQ1 is suitable for 24 V industrial control inputs because its maximum supply rating reaches 26 V and the four channels can process separate sensor or switch signals. Its 1.4 mA supply current per channel helps limit total amplifier consumption when four stages operate continuously, while internal frequency compensation avoids external compensation components. The 2 mV offset is useful when conditioning millivolt-level sensor outputs, and 60 mA per channel provides adequate drive for moderate feedback networks. Because the supply margin is limited to 2 V at 24 V, protection and regulation must prevent supply excursions beyond the device rating.
推薦
Current-Shunt Amplification
The LM2902QDRQ1 can amplify low-level shunt voltages in power-supply and motor-control systems because its 2 mV input offset limits baseline input imbalance. Four independent sections allow measurement of multiple shunt elements or two differential shunt amplifiers plus auxiliary conditioning channels. The 1.2 MHz gain-bandwidth product supports control-loop and current-transient signals, while 60 mA output capability supports typical resistive feedback networks. Care is required to keep the shunt common-mode voltage within the input range and to limit differential input voltage during switching events.
推薦
Transducer Amplification
The LM2902QDRQ1 provides four independent gain stages for bridge, resistive, or voltage-based transducer interfaces. A 2 mV input offset is useful when the transducer output is small, and the 1.2 MHz gain-bandwidth product supports closed-loop gains commonly used in instrumentation. The 3 V to 26 V supply range allows operation from industrial sensor rails, while the -40°C to 125°C qualification supports automotive deployments. For accurate results, use matched feedback resistors, minimize source-imbalance error, and verify the common-mode and output-swing limits for the selected gain configuration.
推薦
Actuator and Driver Signal Conditioning
The LM2902QDRQ1 can condition low-level command and feedback signals for automotive and industrial actuator drivers. Its 60 mA output current per channel can drive resistive and high-impedance driver-input networks, while four amplifiers permit command, limit, current-sense, and feedback paths in one package. The 26 V maximum supply accommodates powered 12 V or 24 V systems after suitable regulation, and the 1.2 MHz bandwidth is appropriate for many control loops. The output voltage must remain within the linear swing range, particularly when the next stage has a narrow threshold window.
推薦
Precision Voltage Comparison
The LM2902QDRQ1 is useful for precision threshold and voltage-comparison functions because it provides four independently compensated amplifiers with a 2 mV input offset. Two channels can implement a comparator-style function while the others provide buffered references or additional monitoring paths. Its 1.2 MHz gain-bandwidth product is adequate for signals in the audio, control, and industrial instrumentation ranges, and the 60 mA output current is suitable for ordinary logic-interface loads. Account for output saturation, input offset over temperature, and propagation delay when using the amplifier near a precision switching threshold.
推薦
推薦產品摘要
工程參考資料，適用於 LM2902QDRQ1 — 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 | LM2902DR | LM2902DRE4 | LM2902VDR2G | LM2902DR2G | NCV2902DR2G |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | onsemi | onsemi |
| Package | SOIC-14 (D) | SOIC-14 (D) | SOIC-14 (D) | SOIC-14 (D) | SOIC-14 (D) | SOIC-14 (D) |
| Number of Amplifiers | 4 | 4 | 4 | 4 | 4 | 4 |
主要差異化特點
- Automotive-grade orderable configuration (對比LM2902DR)
- Four independent amplifiers in one 14-pin package (對比LM2904P3)
- 26 V supply ceiling matches regulated industrial and automotive rails (對比LM2902VDR2G)
- Moderate output-current capability (對比TLV2402ID)
設計說明
Treat the 26 V maximum supply rating as a hard design limit. A nominal 24 V industrial rail can experience startup overshoot or transient disturbances, so verify the maximum rail voltage under worst-case loading and fault conditions. Place a local bypass capacitor at each supply pin and return its ground directly to the device ground. If the source rail can exceed 26 V, add clamping or regulation rather than relying on the amplifier's supply tolerance.
Route the two supply connections and the four ground pins directly to solid plane regions, keeping high-current return paths away from sensitive amplifier inputs. Use a short ground path from each bypass capacitor to the nearest device ground pin. Place input and feedback components close to their associated amplifier pins, and keep switching-node copper and high-current inductors away from the input traces to reduce coupled noise and offset errors.
Do not assume that the 1.2 MHz gain-bandwidth product is the usable closed-loop bandwidth at every gain. The achievable bandwidth depends on the selected noise gain, feedback resistance, source impedance, and capacitive loading. Review the manufacturer stability and frequency-response guidance before driving long cable capacitance or driving an ADC sample-and-hold input directly. Also confirm that input and output common-mode limits remain valid during startup.
The LM2902QDRQ1 is rated for a -40°C to 125°C operating range, but ambient temperature alone does not establish circuit reliability. Estimate dissipation from the actual supply voltage, quiescent current, load current, and output swing, then verify the junction-temperature margin using the package thermal information. Provide copper area for heat spreading and keep the device away from localized thermal sources that could create uneven heating across a quad package.
合規資訊
Texas Instruments identifies LM2902QDRQ1 as an automotive-qualified LM2902-Q1 orderable part. RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations require confirmation in the current product documentation.